If 24% of a DNA sample is made up of thymine(T)
Then percentage of Adenine(A) will be also 24% as they are complementary therefore (AT) will be 48%.
Erwin Chargaff proposed the Chargaff's rule.Chargaff's rules state that in the DNA of any species, the total amount of guanine should be equal to the amount of cytosine as they are complementary and the amount of adenine should be equal to the amount of thymine i.e., A+G=T+C. The base pair rule is 1:1 for any species.It helps in determining the structure and composition of DNA in various organisms.
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Hello! Can someone help me with this science virtual lab? I'm having trouble determining the red highlighted area. I've also attached the pictures to the questions for more information.
The given data from least to greatest. 5.2, 5.3, 5.3, 5.4, 5.5, 5.7, 5.7, 5.8, 5.8, 5.9. The number of data =10 and it is an even number. The middle two terms are 5.5 and 5.7.
What is even number?An even number is defined as a number that is a multiple of 2 is called even number, such as 2, 4, 6, 12, and so on.The sum of two even numbers is even.
If the sum of 6 and another number is even, that another number must be even to get the sum of 6 and another number to be even, while 6 it self is an even number.
Therefore, The given data from least to greatest. 5.2, 5.3, 5.3, 5.4, 5.5, 5.7, 5.7, 5.8, 5.8, 5.9. The number of data =10 and it is an even number. The middle two terms are 5.5 and 5.7.
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cells in the immune system are sometimes named for their color, or the color they become when stained.
Cells in the immune system are named for their color because they are often identified and studied through a process called staining.
Staining involves treating a sample with a colored dye or antibody that specifically binds to a particular cell type or protein, making it visible under a microscope.
For example, white blood cells, which are a type of immune cell, are often classified into different categories based on their appearance when stained. Neutrophils, for instance, are so named because they have a neutral color when stained with a common laboratory dye. Eosinophils, on the other hand, become red when stained with an acidic dye called eosin. Similarly, basophils appear blue-purple when stained with a basic dye called methylene blue.
Other immune cells, such as T cells and B cells, are not named for their color but rather for their function and/or the location where they were first discovered. Nevertheless, staining remains an important tool for identifying and characterizing different immune cell types, and has helped researchers make significant strides in understanding how the immune system works and how it can be harnessed to treat disease.
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What is the name for the small movements of your eye that are pieced together by the brain into perceptually seamless visual movement? a) Saccades b) Motor jumps c) Ocular tracking d) Eye bursts
The brain first puts together what appears to be an image to our conscious awareness in the primary visual cortex, which is situated in the occipital lobes at the back of the head. Thus, option A is correct.
What is the perceptually seamless visual movement?The term "perceptual constancy" describes how perceived geometrical and physical properties of objects hold true despite changes to the objects, such as stiff motion.
The superior colliculus (SC) is a multimodal midbrain region that combines spatial information from the eyes, ears, and somatosensory system to cause the head and eyes to move in the direction of important things in space.
Therefore, Saccades is the term used to describe how your brain assembles the tiny movements of your eye into perceptually continuous visual movement.
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what is the effect in generael of changing the last base in a codon
The effect in generael of changing the last base in a codon is can change the amino acid that is produced during translation which known as a silent mutation.
Mutations are changes that occur in genetic material, both DNA and RNA, which occur at the gene or chromosome level, which can be passed on from parent to offspring.
Silent mutation is a change in a base pair in the gene at position 3 of the codon which results in a change in one genetic code. In some cases, changing the last base in a codon can lead to a different amino acid being produced, which can affect the structure and function of the protein. This is known as a "missense mutation." It is important to note that not all changes in the last base of a codon will have an effect on the protein, as some codons can code for the same amino acid.
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according to the histological pictures of an artery and vein in the blood vessels chapter of the lab manual, which is characteristic of the vein?
The statement that is true about veins is: Veins have valves; arteries do not. Veins are blood vessels that carry blood towards the heart, while arteries carry blood away from the heart.
Compared to arteries, veins have a larger diameter lumen and thinner walls, which make them less elastic and more distensible. Additionally, veins have a lower pressure than arteries, which means they require some mechanism to prevent the backflow of blood. This is where valves come into play - veins have one-way valves that prevent blood from flowing backward, helping to maintain proper blood flow and circulation. In contrast, arteries do not have valves because the blood is under higher pressure and flows continuously in one direction. Overall, veins play an important role in the circulatory system by returning blood back to the heart and are equipped with valves to ensure proper blood flow.
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The complete Question is:
Which of the following is true about veins?
Veins have a smaller diameter lumen than arteries.
Veins are more muscular than arteries.
Veins carry blood away from the heart, while arteries carry blood to the heart.
Veins have valves; arteries do not.
What do ribosomes look like description?
Under an electron microscope, ribosomes are seen to be flattened and spherical in shape, with a diameter of 15 to 25 nm. There are two main ribonucleoprotein components in these complexes.
The smaller component ensures that the transfer RNA's three consecutive, in-frame base pair units known as codons, and the complementary triplet known as the anti-codon connect correctly (tRNA).
A sophisticated biological device, the ribosome. It is mostly composed of ribosomal RNA (rRNA), a specialized RNA, and dozens of different proteins. The large and small subunits of the ribosome, which are two distinct ribosomal components of varying sizes, are how the ribosomal proteins and rRNAs are organized.
The DNA sequence that specifies the placement of the amino acids in protein results in the production of a messenger RNA chain. Ribosomes bind messenger RNAs and utilize their sequences to decide how amino acids should be arranged to generate a particular protein.
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Which of the following is true about why we eat? Choose all that apply
We need to eat so we can create waste products.
We need building blocks for our body.
We need to eat so we can reduce our levels of oxygen.
We need fuel.
Which options are correct^
The statements that are true about what we eat are: options B and D
We need building blocks for our body.We need fuel.Why do we need to eat food?We eat food to provide our bodies with essential nutrients, vitamins, and minerals that are necessary for maintaining good health and performing daily functions. Food provides us with energy in the form of calories, which we use to fuel our physical and mental activities.
Food also helps us build and repair our tissues, support immune function, regulate hormones, and maintain a healthy body weight. We need energy to perform daily activities and maintain our body's functions. Foods that contain carbohydrates and fats provide us with energy.
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Which of these are visible characteristics of stratified squamous epithelium?
-The squamous cells closer to the lumen are flatter while the squamous cells closer to the connective tissue are fuller and rounder. -There are so many layers of cells that it would be difficult to count them precisely. -Stratified squamous epithelium is always adjacent to a free space or lumen.
The epithelium is always adjacent to a free space or lumen.
What is epithelium?Epithelium is a type of tissue that lines the cavities and surfaces of organs and blood vessels throughout the body. It is made up of cells that are packed tightly together to form a protective layer. Epithelium serves many different functions, such as forming barriers, controlling the movement of substances into and out of the body, providing sensory information, and producing secretions such as hormones and enzymes.
Yes, these are all visible characteristics of stratified squamous epithelium. Stratified squamous epithelium is composed of multiple layers of flattened cells that become increasingly full and round as you move away from the lumen. This allows for the epithelium to be more resistant to abrasion and injury. Additionally, there may be so many layers of cells that it is difficult to count them precisely. Finally, the epithelium is always adjacent to a free space or lumen.
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Which part of the urinary system does the filtering of the blood?A. Ureters
B. Bladder
C. Urethra
D. Kidneys
Answer:
D
Explanation:
Answer:
The answer to this question is D.
The tendons of ____ split to allow for the passage of the ____ tendons to attach to the distal phalanges. Flexor digitorum superficialis ; flexor digitorum ...
To allow the flexor digitorum profundus tendons to join to the distal phalanges, the flexor digitorum superficialis tendons separate. Therefore, the correct answers are flexor digitorum profundus and superficialis.
Long held theories suggest that this is how tendon transfer of force between muscles and between muscles and bone happens. Because of this connection, tendons can passively change forces as they move, increasing stability without making any effort. But during the past 20 years, a lot of research has focused on the elastic properties of specific tendons and their ability to function as springs. Positioning tendons, for example, are used primarily to position limbs, such the fingers when writing, while other tendons act as springs to promote mobility (energy storing tendons).
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Most of the growth of a plant body is the result of_____. (A) cell differentiation. (B) morphogenesis. (C) cell division. (D) cell elongation.
Most of the growth of a plant body is the result of cell elongation (D). The combination of cell division and elongation allows plants to achieve impressive growth rates. However, cell elongation plays a more important part.
Cell elongation is also a significant factor in the growth of plant bodies. In addition to cell division, plant cells also undergo significant elongation as they grow, especially in tissues such as stems and leaves. Cell division is the process by which a single cell divides into two or more daughter cells, which then grow and divide further to produce a multicellular organism. In plants, cell division occurs in meristematic tissues, which are regions of actively dividing cells. These cells differentiate and undergo morphogenesis, ultimately leading to the development of different tissues and organs in the plant body. However, the initial growth of the plant body, as well as the continued growth of roots, stems, and leaves, is primarily the result of cell division in the meristematic tissues.
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Some animals, such as race horses, have been produced by selective breeding. Abdul wants to own fast race horses.
(a) Describe how he uses selective breeding to produce fast race horses.
The processes used in artificial and selective breeding of contending horses improves fast racing horses.
Only horses successful on the race tracks are named for parentage, so that the cross will induce the steed with asked racing characteristics from both its parents. picky parentage may be used in nags to produce faster seed. This is because steed racing is a economic assiduity and as similar nags that have great speed can secure large earnings for their possessors.
Selective parentage is when mortal beings control which organisms copulate with each other. People first tamed nags some 6000 times ago in the Eurasian Campo, near ultramodern- day Ukraine and western Kazakhstan. As we put these creatures to work over the coming several thousand times, we widely bred them to have desirable traits like speed, stamina, strength, intelligence, and trainability.
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__________ are useful in collecting blood specimens from small or fragile veins that cannot withstand the pressure of an evacuated tube.
Syringes are useful in collecting blood specimens from small or fragile veins that cannot withstand the pressure of an evacuated tube.
Veins are the blood vessels which carry the deoxygenated blood from the tissues and other parts of the body and deliver it to the heart for purification. They work together with other blood vessels and your heart to keep your blood moving. Veins hold the maximum amount of the blood in your body.
Syringes may be useful in drawing blood from newborns or other patients with tiny, fragile, or rolling veins that would not be able to hold the vacuum pressure from evacuated tubes. A phlebotomist controls the amount of pressure exerted by the syringe by slowly pulling back the plunger. Syringes may also be used with winged infusion sets.
For prevention of hemolysis when using transfer devices, use only the tube’s vacuum and not the plunger to transfer the blood from the syringe into the evacuated tube.
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which level of protein structure is formed by the weak bonds between oxygen and hydrogen atoms?
The secondary structure is formed by weak bonds between oxygen and hydrogen atoms within the polypeptide backbone. The hydrogen bonds that occur between the molecules of the polypeptide backbone are what give the secondary structure its form.
It is important to note that only hydrogen bonds unrelated to amino acid side chains are involved in secondary structure. The form of most proteins is influenced by polypeptide chain segments that are either coiled or folded in specific ways. There are names for several of these coils and folds since they repeat so frequently. The beta-pleated sheet and the alpha-helix are two very prevalent folds in biochemistry.
The right-handed helical coil known as the alpha-helix is joined by hydrogen bonds between each subsequent amino acid. Numerous globular proteins feature lengthy spans of non-helical regions in between alpha-helical segments. Alpha-helices make up the majority of some fibrous proteins, such as alpha-keratin. Alpha-helices are also found in the nails on our fingers and toes. Alpha-helices seen in transmembrane proteins have particular hydrophobic characteristics that enable them to cross membranes and stay stable within the cell membrane. The transmembrane proteins take on a non-helical form outside the membrane, and an alpha-helix is frequently disrupted by a proline residue.
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The given question is incomplete. The complete question is as follows:
Which level of protein structure is formed by the weak bonds between oxygen and hydrogen atoms within the polypeptide backbone?
A. Secondary structure
B. Quaternary structure
C. Tertiary structure
D. Primary structure
Significance of 'heat shock' method in bacterial transformation is to facilitate:
A. Binding of DNA to the cell wall
B. Uptake of DNA through membrane transport proteins
C. Uptake of DNA through transient pores in the bacterial cell membrane
D. Expression of antibiotic resistance gene
The correct answer is option C. Uptake of DNA through transient pores in the bacterial cell membrane.
Heat shock is a technique for changing bacteria that includes subjecting bacterial cells to an abrupt increase in temperature. The bacterial cell membrane momentarily becomes permeable as a result of this abrupt temperature rise, allowing DNA to enter the cell.
Through a mechanism called heat shock, DNA may enter bacterial cells by forming brief gaps in the cell membrane. The absorption of DNA through this pathway is more effective than uptake by membrane transport proteins or DNA binding to the cell wall.
Because of its effective DNA absorption, heat shock is particularly helpful when it's essential to express an antibiotic resistance gene in the bacterium.
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Starting with one bacterium, how many bacteria would there be after 5 hours?
Starting with one bacterium, 4185 bacteria would there be after 5 hours. A culture of bacteria grows exponentially according to the following general exponential growth function.
What are bacteria?Bacteria can be nitrogen-fixers, decomposers or agents/ catalysts. However, in the case, when the complex organic compounds in sewage are broken down by bacteria, the role of bacteria here is "as decomposers. Bacteria on this case decompose highly complex organic compounds.
As shown in the table after 0 weeks or at the beginning of this experiment, the sample A population was 600, while by the end of the fourth week the population had increased to 23438.
Therefore, Starting with one bacterium, 4185 bacteria would there be after 5 hours. A culture of bacteria grows exponentially according to the following general exponential growth function.
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the arteries that anastomose and form the two arterial arches in the palm are the _____ and _____ arteries.
The ulnar and radial arteries join together to create the two artery arches in the palm.
Where are arteries located?All body parts have arteries, with the exception of the hair, nails, dermis, cartilages, or cornea. Inside the limbs, they run along flexor edge, where they are less vulnerable to injury, and the larger trunks typically occupy the most protective positions.
Where do you feel artery pain?Although it can also impact your arms or hands, it usually affect your feet and legs or ankles. Vascular claudication is a different term for leg vascular discomfort. Even while vascular discomfort is less frequent in the arms, it nevertheless affects about 1 in 10 people.
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What are some general characteristics of natural killer cells?
Natural Killer cells are large, granular lymphocytes that are defined by expression of CD56 and CD16 and lack the common T cell marker, CD3, and T cell receptor (TCR) in humans
Natural killer cells provide first line of defense against many viruses. As they can distinguish between infected and uninfected host cells they are able to target and kill infected cells. This allows them to eliminate the infection, or at least hold it in check until virus specific T cells and Ab can be produced.
Large, granular grainy appearance under microscopePart of innate immune systemMake up 5-10% of lymphocytes in human peripheral bloodDisplay cytotoxic activity against a wide range of tumor cells and against cells infected with virusesDo not have T or B cell receptors - must recognize abnormal cells in a different way.Learn more about Natural killer cells here:
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explain the significance of the plateau phase in the action potential of a cardiac contractile cell:
Longer muscle contractions are possible during the plateau period, which also provides neighbouring cardiac muscle cells time to depolarize. This is necessary to enable the heart to beat steadily, consistently, and strongly.
What are the four cardiac action potential phases?currents in the membrane that cause a typical action potential. The 5 phases of the action potential include resting (4), upstroke (0), early repolarization (1), plateau (2), and final repolarization.
What causes a potential plateau?A sustained inward current that is voltage sensitive produces plateau potentials. This current in spinal motoneurones is primarily mediated by Ca2+ inflow through Ca(v)1.3 subtype L-type Ca2+ channels.
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How was the Archaea domain determined to be separate domain?
Due to the significant changes in the structure of their ribosomal RNA, the archaea were separated as a third domain in 1977.
All organisms produce proteins using the specific molecule 16S rRNA. Since this function is so crucial to life, it is unlikely that organisms with mutations in their 16S rRNA will survive, which has led to great (but not absolute) stability in this polynucleotide's structure through generations. Despite being large enough to reveal organism-specific differences, 16S rRNA is still tiny enough to be easily compared.
The category of single-celled organisms is called Archaea. Prokaryotes are bacteria that lack cell nuclei. When archaea were originally classified as bacteria, the name "archaebacteria," which was utilized to characterize them, is no longer widely used.
Depending on their ribosomal RNA (rRNA) genes, Carl Woese and George E. Fox initially distinguished archaea from bacteria in 1977. While other scholars considered these groups as kingdoms or subkingdoms, they named them the Urkingdoms of Archaebacteria and Eubacteria.
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the biggest part of the brain, called the ________, contains the cerebral cortex, which is ________ in humans that other animals.
The biggest part of the brain, called the cerebrum, contains the cerebral cortex, which is more highly developed in humans than in other animals.
Explanation: The cerebrum is the largest and most highly developed part of the brain in mammals, including humans. It is divided into two hemispheres, each of which is responsible for controlling movement and sensation on the opposite side of the body. The cerebral cortex is the outer layer of the cerebrum, and is responsible for a wide range of functions, including perception, cognition, and voluntary movement. The cerebral cortex is more highly developed in humans than in other animals, and is responsible for many of the uniquely human capabilities, such as language, abstract thinking, and problem solving. This is due in part to the expansion of the cerebral cortex in humans, which has occurred over the course of human evolution, and has enabled us to develop more advanced cognitive abilities than other animals.
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what type of lipids form the main structure of the plasma membrane of cells?
The primary structural element of the cell membrane is composed of cholesterol and phospholipids.
Lipids are any organic molecules that are soluble in fat or oil but not in water. They include lipids, waxes, oils, hormones, and some cell membrane components and act as chemical messengers and energy storage molecules.
Lipids perform three major biological functions in the body: they are necessary signaling molecules, fundamental components of cell membranes, and facilities for energy storage. The three main types of lipids are sterols, phospholipids, and triacylglycerols (often referred to as triglycerides). Lipids are frequently referred to as fats or oils. In contrast to fats, which are compounds that are solid at room temperature, oils are substances that are liquid at this temperature.
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A cell from heart muscle would probably have an unusually high proportion of. A lysosomes. B mitochondria. C mRNA. D Golgi bodies.
The majority of eukaryotic cells, including heart muscle cells, have mitochondria.
Due to the quantity of energy required to conduct the contractile activity in cardiac muscle cells, these organelles are crucial for the proper functioning of all cells.
The bulk of a cell's energy is produced by mitochondria in the form of ATP, and this process is known as oxidative phosphorylation.
Due to its contractile nature, the heart muscle has an abnormally high number of mitochondria, indicating that its energy requirements are even higher than those of most other cells.
The creation of the energy required for the muscle to contract and operate effectively depends on the existence of mitochondria in the cardiac muscle cells.
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codes for repair, revision, and reconstruction procedures that are completed to correct an anomaly or injury to an anatomical structure are differentiated by:
Codes for repair, revision, and reconstruction procedures that are completed to correct an anomaly or injury to an anatomical structure are differentiated :
based on the extent and complexity of the procedure.
Repair codes are assigned to operations involving the repair of a defect or damage to a bodily component. These operations often include simple closures or tissue reattachment.
Revision codes are used for operations involving the correction of a previously conducted procedure that did not produce the expected outcomes. These operations are typically more involved than repair procedures, and they frequently need the use of specialist tools or techniques.
Reconstruction codes are used for operations involving the replacement or reconstruction of a bodily component that has been lost or is damaged beyond repair. They are the most complicated of the three, and they frequently necessitate the utilisation of sophisticated surgical methods as well as specific implants or prosthesis.
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which statement is true about a growing population that has reached a stable age distribution, and is maintaining this age distribution?
When a population achieves and maintains a stable age distribution, it is likely that the population growth rate has also stabilized.This is known as demographic equilibrium or a stationary population. In such a population, the number of births is roughly equal to the number of deaths, and there is no net migration.
In a stationary population, the proportion of individuals in each age group remains constant over time, as the number of individuals entering each age group is approximately equal to the number of individuals leaving it. In other words, the population is replacing itself at a constant rate, and the age distribution remains stable.
It is important to note that a stationary population does not mean that the population size has stopped increasing. The population may still be growing, but at a slower rate, as long as the birth rate is equal to or slightly higher than the death rate.
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at what age did girls usually get married in the middle ages?
In the Middle Ages, girls generally married in their teens and boys in their early twenties. A teenager is someone between the ages of 13 and 19.
Was it normal to get married at 14 in 19th century?It was not at all unusual for newly emancipated girls like Susie Baker, or many other girls across the country, to marry at the age of 14 in the mid-19th century.
How old is the youngest bride?Nujoud Ali was just an 8-year-old child when her father arranged the marriage.
How old are Indian child brides?Girls around 16 years old are friends from childhood. They are also child brides and some got married when they were 10 years old. Marriage for girls under the age of 18 is illegal in India. However, due to patriarchy and poverty, the practice still continues in many parts of the country.
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Fill The Blank! of all the species that enzymes bind, they are thought to bind most tightly to _____.
Of all the species that enzymes bind, they are thought to bind most tightly to the transition state.
the transition state is a high-energy state that exists during a chemical reaction when the reactant molecules have been partially converted into products. It is a point of maximum energy along the reaction coordinate and is often represented as a peak in a reaction energy diagram. During a chemical reaction, the reactant molecules must absorb energy to overcome the activation energy barrier and reach the transition state, where the chemical bonds in the reactant molecules are strained and partially broken. Once the reactants reach the transition state, the reaction proceeds spontaneously to form products as the chemical bonds in the products are formed and the energy is released.
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In the sense of "alternation of generations", how many "generations" are included in a mature pine seed?
a. 1
b. 2
c. 3
d. 4
In the sense of "alternation of generations", a mature pine seed contains only one generation, which is the sporophyte generation. Option A is correct.
The sporophyte generation is the dominant and multicellular generation in the life cycle of gymnosperms, such as pines, and produces spores through meiosis. The spores develop into the gametophyte generation, which is a haploid and unicellular generation that produces gametes through mitosis.
The male gametophyte of pines develops into pollen grains, which contain the male gametes, while the female gametophyte develops within the ovule and contains the female gametes. When a pollen grain reaches the female cone, it germinates and fertilizes the egg cell of the female gametophyte, leading to the formation of the zygote and the embryo, which develops into the mature sporophyte, i.e., the pine seed.
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both prokaryotic cells and eukaryotic cells, including h. walsbyi, require ribosomes for translation. the bacterial ribosome is a target of some antibiotics, such as tetracyclines. why is the bacterial ribosome used as a target for drug development? select all that apply.
The bacterial ribosome was chosen as a therapeutic target because
Protein synthesis by ribosomes helps bacteria survive and also result in the production of toxins that can be harmful. Bacterial cells' ribosomes differ structurally from eukaryotic cells' ribosomes.Explain about the bacterial ribosome?The bacterial ribosome is a substantial ribonucleoprotein particle that measures 200–250 nm in diameter and has an estimated molecular mass of 2.5 MDa. The functionally challenging translation of mRNA-based specific genes into amino acid sequences of proteins is being carried out by this complicated macromolecular machine.For the stated question-
Both prokaryotic cells as well as eukaryotic cells, especially h. walsbyi, necessitate ribosomes for translation. Some antibiotics, including tetracyclines, have the bacterial ribosome as their target.Thus, the bacterial ribosome was chosen as a therapeutic target because
Protein synthesis by ribosomes helps bacteria survive and also result in the production of toxins that can be harmful. Bacterial cells' ribosomes differ structurally from eukaryotic cells' ribosomes.To know more about the bacterial ribosome, here
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The complete question is-
Both prokaryotic cells and eukaryotic cells, including h. walsbyi, require ribosomes for translation. the bacterial ribosome is a target of some antibiotics, such as tetracyclines. why is the bacterial ribosome used as a target for drug development? select all that apply.
ribosomes are involved in protein synthesis that facilitate bacterial survival and may produce disease-causing toxinsthe ribosomes of bacterial cells have a distinct structure from those in eukaryotic cellsg which of the following provides a great example for regulation of a process by a post translational modification (ptm)? a: microtubule assembly b: f-actin assembly c: er-associated protein degradation (erad) d: lamellipodia formation in: skeletal muscle contraction
The post-translational level refers to the ultimate phase of gene expression where a protein is made.
The stability, degradation, and functionality of the protein are significantly influenced by this level. The structure and function of a protein are significantly impacted by this covalent modification.
Post-translational modifications (PTMs) are changes made to a protein after it has been cleaved by a proteolytic enzyme and one or more amino acids have been added to a modifying group, such as acetyl, phosphoryl, glycosyl, or methyl.
Protein glycosylation, one of the most significant post-translational alterations of proteins, has a significant effect on protein folding, shape, distribution, stability, and function. Therefore, proteins can behave differently as a result of post-translational changes.
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