Explanation:
ANSWER - THEY PRODUCE AN IMAGE OF A SPECIMEN BY USING A BEAM OF ELECTRONS RATHER THAN A BEAM OF LIGHT.
How many different proteins, each with a unique amino acid sequence, can be constructed with a length of 8 amino acids?
With a length of 8 amino acids, 25600000000 multiple proteins with distinct amino acid sequences can be built.
What is the definition of amino acid sequencing?The method of determining the arrangement of individual different amino acids and peptides is known as amino acid sequencing. Even thoughted fact that many different amino acids have already been identified in nature, essential proteins inside this human body are made up of only twenty different types.
Why is the sequence of amino acids important?Amino acid sequences have been shown to include vital biological information. The arrangement of amino acids in a given protein, for example, can reveal information about the protein's three-dimensional structure as well as its cellular location, and function, including evolution.
According to the given data:There are various types of amino acids. 20
The number of different associated proteins n amino acids is 20ⁿ.
n = length of amino acid long
n= 8 amino acid length.
20⁸ = 25600000000
With a length of 8 amino acids, 25600000000 multiple proteins with distinct amino acid sequences can be built.
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So what makes something alive. CER
claim
something is alive
evidence
it can respire, excrete,move, respond to stimuli, reproduce and grow, and are dependent on their environment.
reasoning
movement internally & eternally is paramount
a cat can move. it is alive
rock does not move it is not alive
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16. How are convection currents in the asthenosphere associated with mid-ocean ridges?
Answer: GoodMorning: ) Ok so this happens When two oceanic plates are pushed away from each other, magma rises to the surface between the plates and creates a ridge.
Explanation: In places where convection currents rise up towards the crust's surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig. 7.21). Hot magma rises to the crust's surface, cracks develop in the ocean floor, and the magma pushes up and out to form mid-ocean ridges.
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The image illustrates a building with a green roof a roof that is covered in
living vegetation. What is a goal of this sustainable practice for societal
development?
A. To replace natural wilderness with more pavement
B. To increase the building's energy costs for heating and cooling
Answer:
reduces the environmental impact of paved surfaces
Explanation:
Apegx
What is a term for hydrophobic groups that are covalently attached to proteins and tether them to the membrane?
Membrane anchors are the hydrophobic groups that are covalently attached to proteins and tether them to the membrane.
Proteins are bound to membranes by different mechanisms. Some proteins are bound because the hydrophobic regions of the polypeptide chain cross the lipid bilayer several times, and therefore a substantial part of the protein is actually located within the hydrophobic interior of the bilayer (see membrane proteins).
Other proteins have a much weaker association with the membrane, using a relatively small membrane anchor for attachment. Depending on the particular protein, this membrane anchor can be a single hydrophobic segment spanning the membrane of the polypeptide, or a variety of different lipids covalently attached to specific sites in the polypeptide chain.
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Habitat fragmentation is a big concern to conservation biologists. how will habitat fragmentation effect evolution by genetic drift?
Genetic drift will be exacerbated by habitat fragmentation, which will result in less variation.
What impact does habitat fragmentation have on genetic drift and evolution?By reducing effective population size and increasing isolation between populations, habitat fragmentation reduces biodiversity and changes inbreeding and genetic drift within populations as well as the frequency of gene-flow between populations.
Smaller populations may experience random genetic variety loss due to genetic drift, whereas isolation and decreased population connectedness due to dispersion may cause genetic drift to predominate over gene flow and enhance population divergence.
A species' range of features will be reduced by habitat loss if it exhibits local adaption to certain environments.
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A group of animals that share a particular set of characteristics forms an
assemblage called an
A group of animals that share a particular set of characteristics and forms an assemblage is called a taxon
A taxon is a collection of one or more populations of an organism or populations of organisms that taxonomists consider to be a single entity. A taxon is typically known by a specific name and assigned a certain ranking, even though neither is necessary, especially if and when it is approved or becomes established. Taxonomists frequently disagree over what constitutes a taxon and the standards for inclusion, though. If a taxon is awarded a formal scientific name, one of the nomenclature codes that indicate which scientific name is appropriate for which grouping will subsequently dictate how it should be used.
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Which macromolecule is a primary component of cell walls, and which argument provides evidence for how the structure of this molecule relates to its purpose within the cell wall?
1. what is the most important physical difference between lilliputiand and brobdingnagians?
The most important physical difference between lilliputians and Brobdingnagians is that the Lilliputians are tiny and the Brobdingnagians are enormous.
This question is related to the story "Gulliver's Travels."
Lilliputians are much smaller, only 5 to 6 inches tall to accompany their mischievous nature.
While Brobdingnagians are almost seventy-two feet tall. England is 'below them' but they still take out time to listen to other people's opinions.
Gulliver was captured by the Lilliputians who tied him with ropes.
later on, they decided to release Gulliver because he behaved quite nicely and asked for a safe exit from their area.
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Several NADH and FADH2 are created in one turn of the Krebs cycle. Where do these molecules go next, and why are they important?
Answer: they go to the Electron Transport System and convert into energy and water.
Explanation:
The NADH and FADH₂ are produced in the Krebs cycle are sent to the final step of cell respiration, electron transport chain. The Krebs cycle does not use oxygen because it runs on NADH and FADH₂.
What is Electron Transport Chain?Electron transport chain is a series of protein complexes and molecules which transfer electrons from one electron donor to the other electron acceptor via different redox reactions and couples this electron transfer reactions with the transfer of protons across the mitochondrial membrane. A series of proteins in the inner membrane of mitochondria are involved in the electron transport chain.
NADH and FADH₂ molecules are formed during the process of Glycolysis and Krebs Cycle which carry the electrons to the electron transport chain in the mitochondria. The electron transport chain runs on a proton gradient which ultimately leads to the production of ATP.
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How might a pyramid of energy for a grassland community differ between summer and winter? think about the effects the different abiotic conditions by drawing an ecological pyramid of energy each season. explain any differences between the two pyramids.
In the winter, the energy pyramid in a grassland community is thinner than in the summer. Thus, the abiotic factor that determines the differences between the two pyramids is sunlight.
What is a grassland?A grassland refers to an area that is mostly composed of grasses and shrubs. The grassland community depends heavily on the primary productivity from the green grasses. In turn the primary productivity of the grassland ecosystem depends on the energy from the sun.
When there is less sunlight, there would be less primary productivity and little energy is transported across the energy pyramid. The low primary productivity owes to a decreased amount of sunlight.
Hence, in the winter, the energy pyramid in a grassland community is thinner than it appears in summer when the sun is intense.
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You believe a bacterium is attaching to animal cells by binding to the carbohydrate portion of a specific glycoprotein. To test this hypothesis you pre-incubate the bacteria with various molecules and then test for inhibition of attachment to the animal cells. Which result supports the hypothesis that the bacteria recognize the carbohydrate component of the animal glycoprotein?.
"Pretreatment with the carbohydrate component alone prevents bacteria attachment to the animal cells." is the result which supports the hypothesis that the bacteria recognize the carbohydrate component of the animal glycoprotein.
The glycoprotein molecule is created by the covalent interaction of glycans with the side chains of amino acids. The contact between cells is greatly influenced by this kind of protein. O-glycosylation, N-glycosylation, p-glycosylation, and s-glycosylation are only a few of the several forms of glycosylation that may be distinguished.
The findings demonstrate that pure carbohydrates prevent sperm adhesion just as well as complete glycoprotein.
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Question correction:
You believe a bacterium is attaching to animal cells by binding to the carbohydrate portion of a specific glycoprotein. To test this hypothesis you pre-incubate the bacteria with various molecules and then test for inhibition of attachment to the animal cells. Which result supports the hypothesis that the bacteria recognize the carbohydrate component of the animal glycoprotein?
-Pretreatment with the carbohydrate component alone prevents bacteria attachment to the animal cells.
-Pretreatment with the entire glycoprotein prevents bacteria attachment to the animal cells.
-Pretreatment with the entire glycoprotein allows bacteria attachment to the animal cells.
-Pretreatment with the protein component alone prevents bacteria attachment to the animal cells.
What is the difference between a bacteria with id50 of 100, and bacteria with a id50 of 100,000.?
The ID50 value is defined as the concentration of antiviral drug required to reduce the HSV-specific DNA by 50% compared with the untreated virus controls.
The median infective dose (ID50) of Cryptosporidium parvum and to describe the dose–response relationship including associated clinical illness in experimentally challenged dairy calves. Within the first 24 h of life, 27 test calves were experimentally challenged with C. parvum oocysts and 3 control calves were sham dosed. Test calves received 1 of 8 possible doses (25, 50, 100, 500, 1 × 103, 1 × 104, 1 × 105, and 1 × 106 oocysts).
The infective dosage, or ID50, is the average amount of organisms or virus particles expected to cause infection in 50% of healthy adult humans exposed by a specified pathway.
Here the virus with a much lower ID50 requires a lower viral load to infect a human compared to a bacteria with an ID50 of 100,000. Hence the virus has a higher infectivity then bacteria .
The ID50 value is defined as the concentration of antiviral drug required to reduce the HSV-specific DNA by 50% compared with the untreated virus controls. In the Clinical Virology Laboratory at Children's Hospital of Philadelphia, HSV isolates with in vitro ID50 values of ≥2 μg/ml for acyclovir and ≥100 μg/ml for foscarnet are considered resistant to these antiviral agents.
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A pear tree was saved from the site, rehabilitated and eventually returned to the site of the memorial. What is the tree called?.
After surviving the World Trade Center terrorist attacks on September 11, 2001, a Callery pear tree earned the nickname "Survivor Tree."
The "Survivor Tree," a callery pear tree that was found severely injured near Ground Zero in October 2001 with cracked roots and charred and broken limbs, is located on the 9/11 Memorial plaza. It was taken out of the wreckage and given to the NYC Department of Parks and Recreation for care. The tree was returned to the Memorial in 2010 after its recovery and rehabilitation, where it continues to stand as a living symbol of tenacity, survival, and regeneration. The Survivor Tree is an American elm that was alive during the 1995 explosion in Oklahoma City and now resides on the north side of the Oklahoma City National Memorial.Learn more about the Oklahoma city bombing with the help of the given link:
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Where is the information that directs different polypeptides to fold into different shapes?.
The information that directs different polypeptides to fold into different shapes is the order and typee of amino acids (i.e., the primary structure) conatins the information that directs folding.
Polypeptides are made up of two words which are poly which means many and peptide which are the chain of amino acids joined by peptide bond polypeptides are the primary structure of the proteins made by amino acids and by the release of one water molecule from one amine and one hydroxyl group which are NH2 and OH respectively and this primary structure further leads to the formation of secondary tertiary and quarternary structures .
which depends upon the different types of bonding found in them .
which can be hydrogen bonding, van der wall forces, disulfide linkage, ionic bonding, and electrostatic forces and the presence of amino acids in the primary structure further directs the folding of the primary proteins as if cystine amino acid is present in large amount it will form disulfide linkage due to presencee of sulphur in the cystine group and this will lead to formation for quartnery folding,
if amino acids like glycine or arginene are present they will lead to formation pf secondry structures as they will form the hydrogen bonding and also the position of these peimary amino acids determines the direction of folding to form the 3D conformation and the correct folding is very necessary as misfolding can lead to malfunctioning of all the cellular processes happening in the body.
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Viruses ______.
a. cannot be seen in a light microscope
b. are prokaryotic
c. contain 70s ribosomes
d. undergo binary fission
Viruses a. cannot be seen in a light microscope.
Viruses can be described as tiny microorganisms that are known for causing many infectious diseases in other organisms.
The size of a virus is too small to be seen under a light microscope. The general size of a virus ranges from 20 to 400 nm. On the other hand, the size range of viewing samples under a light microscope is 500 nm – 1,000 nm. Hence, as viruses size range is lesser than a light microscope, they cannot be observed under a light microscope.
All other options are not correct as viruses are neither prokaryotes nor eukaryotes. Scientists still debate whether to consider viruses as living or non-living particles as they cannot replicate outside a host cell. Binary fission is a process seen in prokaryotes such as bacteria. Viruses do not under binary fission.
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A selection pressure for the development of flower petals might have been: group of answer choices increased attraction for pollinators all are correct increased attraction for predators increased surface area for wind pollination
All are correct, the development of flower petals might cause increased attraction for pollinators, increased attraction for predators, and increased surface area for wind pollination.
Flowers' reproductive organs are encircled by petals, which are modified leaves. To draw pollinators, they are frequently brightly colored or shaped differently. The corolla is the collective name for a flower's petals. Functions of the petal include scent production and color changing which is used to attract pollinators and also attract predators.
Flowers also exhibit different types of pollination and wind pollination is one of it, for flowers that undergo wind pollination require little or no petal since the pollens are to be scattered by wind. The development of the flower's petal in terms of the size, scent, colour depends on what type of pollination, whether the flower attracts pollinators or/and predators.
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How does water having high specific heat capacity and high heat of vaporization help life on earth?.
The high specific heat capacity and high heat of vaporization of water help in sustaining life on earth by absorbing heat.
The specific heat of vaporization for water is high which helps to make life sustainable on Earth. One mole of water needs 40,000 Joules of energy for vaporizing. Excess heat is stored in the water from the Sun which protects the land on Earth from getting too hot. The heat is then released slowly when the temperature on land decreases.
It is due to the specific heat capacity of water that aquatic life is possible in the oceans. Around 70 percent of the Earth is water which absorbs excess heat energy from the Sun hence protecting the life on Earth from high temperatures.
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Overconsumption of _____ is often linked to chronic disease. multiple select question. sodium
Overconsumption of sodium, saturated fat and sugar increase the risk of chronic disease.
What is chronic disease?A sickness or condition that typically lasts three months or longer and has the potential to worsen over time. Elderly people are more prone to developing chronic diseases, which are typically treatable but not curable. Diabetes, arthritis, heart disease, and stroke are the most prevalent chronic diseases.
Many chronic diseases are caused by:A small number of risk behaviors are responsible for many chronic diseases:
smoking tobacco and being among those who are smoking.Nutritional deficiencies, such as diets high in sodium and saturated fats but deficient in fruits and vegetables.a lack of movement.alcoholism in excess.to know more about chronic disease please check the link given below:
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Leaves are composed of vascular tissue that brings water in so that ground tissue can conduct photosynthesis. Based on this information, what level of organization describes leaves?.
Vascular tissue makes up leaves, bringing in water for ground tissue to perform photosynthesis. Based on this information, leaves are organs.
What is photosynthesis?Plants and other living things employ a process called photosynthesis to transform light energy into chemical energy that may be released through cellular respiration to power the organism's activities.
Describe leaves?Any of the major, typically laterally borne, aboveground appendages of a vascular plant stem that are specialized for photosynthesis is called a leaf. Leaves are collectively referred to as "flora," as in "fall foliage," whereas the shoot system consists of the leaves, stem, blossom, and fruit. Palisade mesophyll, which is typically found on the upper side of the blade or lamina of the leaf, is the primary photosynthetic tissue.
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Cells lining the gut need to take in glucose, but at a certain time, the concentration of extracellular glucose is lower than the concentration already stored in the cells. What process is needed here?.
If the concentration of extracellular glucose is lower than the concentration already stored in the cells then the cell needs to undergo Active transport so as to take up the cell.
In the gut wall, active transport takes place. From a low concentration in the stomach to a higher concentration in the blood, sugar is moved with the aid of active transport. This makes it possible for the gut's glucose to be absorbed. The body uses this glucose for Respiration.
What is Active transport?
A type of cellular transport known as active transport involves the movement of materials (such as ions, glucose, and amino acids) across a biological membrane in the direction of an area where a lot of these materials are already present.
Because of this, active transport moves these molecules against their concentration gradient using chemical energy (such as ATP).
As a result, this activity calls for the use of energy as well as the support of membrane proteins such carrier proteins.
The small intestine's wall and root hair cells are frequent locations for active transport (villi).
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Why doesn't your blood turn acidic after drinking acidic drinks ?
Answer:
Buffering system of blood
When any acidic substance enters the bloodstream, the bicarbonate ions neutralize the hydronium ions forming carbonic acid and water.
Which of Charles Darwin’s main points is depicted in the image?
Answer:
evolution of man/natural selection.
Explanation:
his demonstration on evolution.
Which type of antigen-presenting molecule is found only on macrophages, dendritic cells, and b cells?
MHC II type of antigen-presenting molecule is found only on macrophages, dendritic cells, and b cells.
MHC II type of antigen belongs to a class of major histocompatibility complexes (MHC).
These are normally found on the antigen cells such as B cells, dendritic cells, endothelial cells, and thymic epithelial cells.
MHC cells are very crucial as they initiate the responses of the immune system.
Owing to their selectivity properties, they are present on the antigen-specific CD4+ T cells.
Moreover, they play a key role in controlling and regulating the autoimmunity and immunity systems.
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Could someone help me please
Answer:
2,3,4,6,7 absolutely. 1 no since bacteria is alive and is single celled, 5 no because an example of snakes don't develop, 8, some don't maintain it.
Answer:
__X_Are made of cells and have an organized structure.
__X_Reproduce and pass their genes(traits, characteristics) to offspring.
_X__Metabolize and obtain energy needed for food(light for plants).
___Grow and become larger.
_X__Develop and become specialized(an example is a human going from being carried to crawling, toddling, and then walking).
_X__Over long periods of living, things evolve in response to their environment.
__X_Respond to their environment.
_X__Maintain homeostasis.
Explanation:
I hope this is the answer you are looking for and I hope this helps!
Marfan’s syndrome is a disease associated with faulty manufacture of the extracellular protein fibrillin. Since this is a component of elastin, in which of the numbered cells would the damaged gene be expressed?.
Marfan syndrome is related to an autosomal dominant condition.
There are several organs constructed of elastic fibres. Skin, skeletons, and joints are the most frequent organs. Marfan syndrome will show as the chest form, long as well as thin bones (arms, legs, fingers), stretch marks inside the skin, or eye lens.
Marfan syndrome, the genetic illness, affects connective tissue, or even the fibres that hold and attach the organs and other body parts. Marfan syndrome most usually affects the skeleton, blood vessels, heart, and vision. It occurs since the normal growth of connective tissue cannot continue with just one functional copy of such FBN1 gene.
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Where would the lac repressor be bound in a e. coli cell that is growing in low glucose and high lactoze?
Repressor changes its conformation when it binds to lactose, which prevents it from binding to DNA. This enables the transcription of the lactose operon.
What transpires to the lac operon when lactose is absent?The lac operon is turned off in the absence of lactose. This occurs because a protein called a repressor attaches to the operator region. This prevents RNA polymerase from attaching to the operon, which in turn stops the structural genes from being transcribed. Allolactose, which binds to the repressor protein, is created when lactose is present. As a result, the repressor protein loses its ability to bind to the operator region and inhibit transcription. This enables the three structural genes for beta-galactosidase, beta-galactosidase permease, and beta-galactosidase transacetylase to bind and be translated by RNA polymerase.Learn more about the lac operon with the help of the given link:
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What is cellulose?
A. a polysaccharide
B. a protein
C. a lipid
D. a fat
Answer:
polysaccharide
Explanation:
The most important structural component of plant cell walls is cellulose. Cellulose is a carbohydrate found in the cell wall of plants. The carbohydrate is a polysaccharide structure. Polysaccharide is made up of a long chain of several sugar units bonded together by chemical linkage. Polysaccharides examples are chitin, glycogen, cellulose, and starch. On average, a dry plant comprises 40 to 50 percent cellulose.
Is this correct ?!?!?
Answer:
No its the first one
Explanation:
Asexual reproduction allows for a population to boom in a short period of time, since there only needs one organism. That being said its important to note that the offspring will be a clone of the parent, so the genetic diversity is low. However the advantage is that the population grows really fast, think of bacteria. Most reproduce asexually, and bacteria growth is very fast given the right conditions.
A scientist who studies the origin and distribution of all types of diseases is best described as a(n):________
Answer: Epidemiologist
Explanation: I believe it is epidemiologist because they are scientists who usually study the origin, spread, and effects of diseases. This is why you usually find them employed in public health agencies as they study diseases and how to prevent them.
