El ciclo celular es un conjunto ordenado de eventos que hacen que una célula crezca y se divida en dos células hijas. Los estadios son: G1-S-G2 y M. El estado G1 significa "BRECHA 1" (Brecha 1). El estado S representa la "síntesis" donde se produce la replicación del ADN. El estado G2 significa "GAP 2" (Brecha 2).
Which option best describes what happens when covalent bonds form between hydrogen and oxygen atoms in a water molecule?
O Two hydrogen atoms share their electrons with an oxygen atom.
O Two hydrogen atoms donate electrons to an oxygen atom.
O Positively charged hydrogen atoms weakly attract an oxygen atom.
O Negatively charged hydrogen atoms strongly attract an oxygen atom.
When covalent bonds form between hydrogen and oxygen atoms in a water molecule two hydrogen atoms share their electrons with an oxygen atom.
Covalent bonds :A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are simultaneously drawing these electrons to them. When the difference between the electronegativities of two atoms is too small for an electron transfer to take place to form ions, a covalent bond is formed.
What is the difference between ionic and covalent bonds?An atom can form bonds with other atoms in two main ways: covalent and ionic. The sharing of electrons between two or more atoms forms a covalent bond. When two or more ions come together, they can form ionic bonds that are held together by charge differences.
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Answer: When covalent bonds form between hydrogen and oxygen atoms in a water molecule two hydrogen atoms share their electrons with an oxygen atom.
Assume you stain bacillus by applying malachite green with heat and then counterstaining with safranin. Through the microscope, the green structures are.
A man with blood type a and a woman with blood type b have three children: a daughter with type ab and two sons, one with type b and one with type o blood. what are the genotypes of the parents?
The genotype of the parents with blood types A and B will be AO (father) and BO (mother).
A, B, AB, and O are the four primary blood types (groups). Your blood type is determined by the genes you got from your parents.
Four main blood types are distinguished by the ABO system:
Blood group O - contains both anti-A and anti-B antibodies in the plasma but no antigens. A and B antigens are present in blood group AB, however there are no antibodies. Red blood cells with blood group A antigens have anti-B antibodies in their plasma. B antigens and anti-A antibodies are present in the plasma in blood group B.Since the children have all three types of blood types this means that the parents are heterozygous:
AO X BO (parents)
AB, AO, BO, OO (children)
Thus, the parents will be AO and BO.
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Which functional group, if found in the r group of an amino acid, would most likely be able to form an ionic bond force with a charged amino group on another molecule?.
The R group of an amino acid has a carboxyl functional group, which most likely forms an ionic interaction with a charged amino group on another molecule.
Amino acids are categorised as organic substances in organic chemistry. Alpha-amino [alpha-amino] carboxylic acid is the complete name for amino acids.
The amino acid's structure reveals that it has two functional groups inside: an amino group and a carboxyl group.
A carbon atom, commonly known as alpha carbon (-carbon), a hydrogen atom, and a R group make up each amino molecule.
To give the carbon atom its required valency of 4, the carboxyl group, H atom, and r group are all joined to it.
Simply speaking, amino acids are organic compounds that have a carboxylic functional group.
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Why is it a challenge for explorers like Eddy Cartaya to correctly map the caves that form in Sandy Glacier?
What are some of the interesting items that Cartaya and his team have found inside Snow Dragon Cave?
Over the last two years, explorers Eddy Cartaya and Brent McGregor have used ropes, ice screws, wet suits, and flashlights to map out more than a mile of channels beneath a glacier on Mount Hood in Oregon, in what are considered to be America's largest known glacier caves outside of Alaska.
McGregor and Cartaya named three caves in the Sandy Glacier after themselves: Snow Dragon, Pure Imagination, and Frozen Minotaur. The combined 7,000 feet of passageways extend beneath the ice like fingers of a hand.
The caverns are located in the Sandy Glacier, which clings to Mount
Hood's western face at thousands of feet above sea level.
Some of the shafts are narrow, but others expand to 80-foot-wide chambers. They occasionally scale waterfalls that have frozen in place in the caverns. Along the way, they take measurements to see how the caverns are altering.
Cartaya and McGregor escorted Oregon Public Broadcasting's Amelia Templeton and others into the caverns towards the end of the summer, showing us incredible caves that seem like sets from a sci-fi film.
Templeton and her OPB colleagues were inspired by the breathtaking views to develop Thin Ice, a stand-alone show on the caverns. OPB will also devote an upcoming episode of Oregon Field Guide to the discovery.
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Please help!
Match the sequences with the mutations that occurred in them.
Group of answer choices
A
B
C
D
The type of mutations occurred in the shown chromosomes are as follows:
A - Translocation
B - Deletion
C - Inversion
D - Addition
What is chromosomal aneuploidy?Chromosomal aneuploidy is referred as the mutations in the chromosomes that results in abnormal number of chromosome. Aneuploidy is an outcome of anomaly in the cell division.
Down syndrome is a common example of chromosomal aneuploidy in which trisomy of chromosome number 21 is observed. The chromosome has one extra copy present.
It is possible to scan chromosomal aneuploidy during the first trimester to avoid genetic complications in the child.
Thus, chromosomal aneuploidy is not a common condition but if happens, it can pose several complications.
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when most substances get colder they get more
All of the following are excellent tips for test day except.
• A. Avoid guessing on answers you
don't know.
• B. Bring two pencils and a calculator.
• C. Dress comfortably for the test room.
• D. Keep track of your time as you
take each section.
SUBMIT
All of the given options are excellent tips for test day except for option A: "Avoid guessing on answers you don't know."
While it is generally advisable to answer all questions on a test, guessing can sometimes be a helpful strategy when you can eliminate some answer choices or make an educated guess.
It is important to use your judgment and consider the specific test format and scoring system. Options B, C, and D are all valuable tips: bringing two pencils and a calculator ensures you have backup tools, dressing comfortably helps maintain focus, and keeping track of time helps you allocate it appropriately for each section.
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Review - There are two factors that led to the overpopulation of the reindeer on St. Matthews Island. What are they?
Answer:
The population also responded to the high quality and quantity of the forage on the island by increasing rapidly due to a high birth rate and low mortality.
Explanation:
The transport tubes for food coming down the plant are called
O xylem
O epidermis
O cortex
O phloem
Answer:
phloem
Explanation:
phloem transports food from the leaves to the other parts of the plant.
A glucose-na symport will transport na _______ the cell and glucose __________ the cell.
A glucose-Na symporter will transport Na and glucose in the same direction into the cell.
A membrane protein called a symporter is necessary for the controlled translocation of two different substances across cell membranes. Symporters, a type of cotransporter, work in the plasma membrane to carry substances across the cell membrane at the same time and in the same direction.
A transmembrane protein known as the sodium-glucose symporter performs sodium-driven secondary active transport in the epithelial cells of the small intestine. It is found on the apical membrane of the epithelial cells.
In order to pass through the cell, sodium and glucose will both adhere to the symporter at once. The gradient produced by the sodium-potassium pump will be fixed by this procedure.
Due to their attachment to the symporter, glucose-Na will therefore move in the same direction.
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Enzymes are specific or picky. So the enzyme that works with a chemical reaction of triglycerides will.
Enzymes are specific or picky. So the enzyme that works with a chemical reaction of triglycerides will is that the enzyme will work with more triglycerides.
Enzymes are the biocatalysts that are used to increase the rate of the reaction they are working on by lowering the activation energy where the activation energy is the minimum or threshold energy required for the substrate to form products and that is high the substrates cant be turned into products so the lowering of it can be done by enzymes.
The enzymes are said to be specific and that is why the mechanism they use is lock and key for a specific lock there is a specific key in the same way for every reaction there is a specific enzyme as if proteins needed to be changed into products the enzyme used will be protease and if lipids needed to be changed the enzymes used will be lipase so triglycerides are the lipids or fatty acids made up of three glycerols joined together and because it is a fatty acid the enzyme which will work is lipase and the chemical reaction of triglycerides by enzymes will work only with more triglycerides and not any other molecules.
The Enzymes are specific in nature because they can work only at certain ph and also they have certain ability to what extent they can lower the activation energy nd as substrates are different there energies also differe so the enzymes working on that particular energy needed by substrate is used henece they show soecificity.
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Protein kinases generally regulate the activity of target proteins by transferring a phosphate group from atp to what kind of functional group on the target protein?
Protein kinases generally regulate the activity of target proteins by transferring a phosphate group from ATP to hydroxyl group
What is Protein kinases ?By phosphorylating particular amino acids with ATP as the source of phosphate, protein kinases (PTKs) are enzymes that control the biological activity of proteins. This results in a conformational change from an inactive to an active form of the protein.
Because of their crucial function in the signalling systems that drive the features of malignant cells, protein kinases are significant therapeutic targets in cancer.Enzymes are impacted by protein kinases by altering their structure. By converting the enzyme's shape into an active conformation, they activate enzymes. By using the same technique of altering the proteins' conformation, they can also disable enzymes.Learn more about Protein kinase here:
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What is the difference between growth and development in a multicellular organism.
The two concepts "growth" and "development" that have probably given us the most trouble over our academic careers are these.
Growth is the simple definition of "an increase in size and mass of a specific organism over time," whereas "development" covers a wider range of topics. The definition of "development" is "the process through which a particular organism changes from a lone cell to a more complex multicellular creature."While development can include an organism's structures, functions, capacities, etc., growth just considers how big or enormous an organism is. The biomass can be used to gauge growth. Cell differentiation is a necessary component of development. These cells can become highly specialized and perform their respective activities throughout time. Every living thing is in a different stage of growth.Learn more about the Growth and development with the help of the given link:
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If a template strand of dna has the sequence gactta, transcription will result in a:_________
If a template strand of DNA has the sequence GACTTA, transcription will result in a single RNA strand with the sequence CUGAAU.
It is through the process of transcription that information from DNA is transcribed to mRNA. The mRNA strand is then translated to proteins.
After transcription, a single RNA strand is formed because, unlike DNA, RNA is single-stranded.
In the DNA, the nucleotide base adenine(A) pairs with thymine (T), and cytosine (C) pairs with guanine(G). In the RNA, the thymine base is missing hence adenine(A) pairs with uracil (U).
Hence, the complementary RNA formed for the DNA template with the sequence GACTTA, will be CUGAAU. G will pair with C, A with U, C with G, T with A, T with A, and A with U.
Although a part of your question is missing, you might be referring to this question:
If a strand of DNA has the sequence GACTTA, transcription will result in a ________.
A) single RNA strand with the sequence CUGAAU
B) DNA double helix with the sequence CTGAAT for one strand and TAAGTC for the complementary strand
C) single RNA strand with the sequence CTGAAT
D) DNA double helix with the sequence CUGAAU for one strand and UAAGUC for the complementary strand
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What do biological anthropologists call the taxonomic group that includes humans and humanlike ancestors, excluding living nonhuman primates?
Biological anthropologists call the taxonomic group that includes humans and humanlike ancestors, excluding living nonhuman primates as hominins.
In the field of anthropology, hominins can be described as the taxonomic group consisting of modern humans, ancestral humans, and extinct species of humans.
Primates that do not have human-like origin are not a part of the hominins. Humans are the current living species of hominin origin. The ancestors through which humans came into existence are studied through fossils and are extinct hominins.
Biological anthropologists differentiate hominins from other primates based on their special characteristics such as straight posture, having specific language speaking ability, walking on two legs etc.
The study of hominin evolution makes it possible to understand the complexity of modern humans and how they came into existence.
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Would you ban dihydrogen Monoxide?
Answer:yes its poisonous
Explanation:
Answer:
Very much toxic for our well being
True or False: Youth violence impacts families, communities, and students from all economic and cultural backgrounds.
Answer:
true
Explanation:
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?.
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. Pretreatment with the protein component alone prevents bacteria attachment to the animal cells supports the hypothesis that the bacteria recognize the carbohydrate component of the animal glycoprotein.
Animal glycoproteins are composed of two separate components: proteins and carbohydrates. We wish to demonstrate that the supplied bacteria binds to the glycoprotein's carbohydrate part rather than its protein portion.
We can treat the bacteria with just the protein portion of the glycoprotein if we wish to demonstrate that the bacteria only binds to the carbohydrate element of the glycoprotein.
It is easily demonstrated that the bacteria does not connect with the animal glycoprotein through the protein part if the bacteria is unable to bind to the protein component. It basically means that bacteria will only interact with glycoproteins through their carbohydrate parts.
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The complete question is ''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? See Section 5.3 (Page 114) . Pretreatment with the protein 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 carbohydrate component alone prevents bacteria attachment to the animal cells''.
Chyla’s mother is an educator, and Chyla saw how much her mother loved it when students were able to grasp difficult subjects. Chyla wanted a career that would be that satisfying. She was drawn to animals, though, and loved to learn more about how to take care of different creatures. As she went through school, Chyla kept the same interests and felt torn when it came down to deciding on a career path. In what career might Chyla be able to combine her two passions?
A.
a microbiologist in a veterinary science lab
B.
a professor at a veterinary college
C.
an inspector for a government organization
D.
an exotic animal veterinarian at a wildlife rescue
Chyla should be a professor at a veterinary college. So the correct option is B.
What is a veterinarian?
A veterinarian is a medical expert who safeguards both the health and well-being of animals and humans. They cure ill and damaged animals as well as detect and manage animal diseases. They also provide advice to owners on how to properly care for their pets and animals.
Veterinarians work in a variety of settings, including private practice, education, research, government service, public health, military duty, private enterprise, and others.
A veterinarian promises sincerely to apply his or her scientific knowledge and abilities upon taking the veterinarian's oath. It states "for the benefit of society, through the protection of animal health, the relief of animal suffering, the conservation of animal resources, the promotion of public health, and the advancement of medical knowledge."
Therefore the correct option is B.
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What are the haploid forms of water mold?
Phylum Oomycota in the Stramenopile supergroup are the haploid forms of water mold.
What is a water mold ?Organisms that live primarily in fresh water or moist soil and are parasitic or saprophytic. Multinucleated organisms that resemble fungi on the surface but are now understood to have their own independent evolutionary history and belong to the kingdom protista.
The Oomycota subphylum of the Stramenopile supergroup is home to water molds. Oomycetes are fungus-like organisms as well, with cellulose-based cell walls. They have motile spores with two flagella, which they share with myxomycetes.
What type of mold grows in water?Achlya, Leptolegnia, and Saprolegnia are common genera. Water molds are tiny organisms, but the mycelium—the filaments that make up the water mold's body—is frequently noticeable around pieces of decomposing organic matter.
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Reduced vitamin K is needed for the synthesis of prothrombin. An enzyme, vitamin K epoxide reductase (VKOR), converts vitamin K to reduced vitamin K. The diagram on the top shows this conversion. Another diagrams show the structures of warfarin and vitamin K. Using the information in the diagrams, suggest why warfarin inhibits the synthesis of prothrombin.Reduced vitamin K is needed for the synthesis of prothrombin.
The anticoagulant effect of warfarin is mediated through the inhibition of vitamin K-dependent coagulation factors (II, VII, IX and X). This effect of warfarin results in the synthesis of immunologically detectable but biologically inactive forms of these clotting proteins.
Is vitamin K reduction necessary for prothrombin synthesis?Vitamin K deficiency is associated with increased prothrombin time and bleeding events. In bone health, the vitamin acts on osteocalcin, allowing it to bind to calcium. Therefore, vitamin K deficiency would be associated with impaired bone calcification.
Whit this information we can conclude that Vitamin K is essential in the blood clotting process. This is because it helps proteins to transform into substances that contribute to the correct clotting of the blood. Therefore, this vitamin also contributes to better healing.
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According to vsepr theory, which one of the following molecules is trigonal byramidal?
a. sf4
b. xef4
c. nf3
d. sf6
e. pf5
Based on valence electrons, VSEPR theory specifies the molecule geometry. The repulsion between the electron pairs determines where the bonded atom is located.
According to VSEPR theory, PF5 molecules are trigonal pyramidal.
How does the VSEPR theory work?Founded on the digit of valence shell electron bond pairs between the atoms in a molecule or ion, the valence shell electron pair repulsion (VSEPR) theory is a model used to predict 3-D molecular shape. According to this view, electron pairs choice place themselves to reduce the results of their joint aversion. The geometry of individual molecules can be predicted using the chemical model known as the valence shell electron pair repulsion hypothesis based on the number of electron pairs that surround the core atoms of the molecules. In honor of its two primary creators, Ronald Gillespie and Ronald NY Holm, it is sometimes known as the Gillespie-NY Holm theory. In chemistry, the number of electron pairs surrounding a core atom can be used to predict the three-dimensional geometries of molecules using the valence shell electron pair repulsion (VSEPR) theory.Therefore the correct answer is option e. pf5
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Many industrialized countries exist in an ecological deficit due to their lack of productive land, overproduction of waste, or low freshwater supplies. Which scenario describes a way to prevent overshoot of an industrial country's ecological footprint?
Import beef and soy products into the country
Export garbage and wastes to other countries
Dispose of industrial wastes in the ocean
Set daily limits for watering yards and farms
The Ecological Footprint calculates how quickly nature can absorb our waste and provide resources compared to how quickly humans consume resources and produce garbage.
What is an industrial country's ecological footprint?The usage of productive surface areas is monitored via the ecological footprint.
These areas typically include: cropland, grazing land, fishing grounds, developed land, forest area, and land with high carbon demand.
The quantity of resources a person uses and the amount of garbage they generate that must be filtered out by the environment's biogeochemical cycles are examples of ecological footprints.
Therefore, dispose of industrial wastes in the ocean, a way to prevent overshoot of an industrial country's ecological footprint.
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Which tissue in the wall of the uterus is required for labor contractions?
a) elastic cartilage
b) skeletal muscle
c) smooth muscle
d) stratified squam
Smooth muscle tissue in the wall of the uterus is required for labor contractions.
The correct option is C.
Describe the uterus:The uterus is a flat, muscular organ located in the female pelvis between the rectum and the bladder. The eggs that pass through the oviduct are created in the ovaries.. After leaving the ovary, the egg can be developed and placed in the uterine lining.
Why does the uterus grow large?Uterine fibroids and adenomyosis are two of the most typical causes of an enlarged uterus. uterine tumors. By the time they reach the age of 50, uterine fibroids, which are typically non-cancerous tumors of the uterus' muscular wall, can affect up to eight out of ten women.
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A media is designed that allows only staphylococci to grow. in addition, s. aureus colonies have a yellow halo around them and other staphylococci appear white. this type of media is:________
A media is designed that allows only staphylococci to grow. in addition, s. aureus colonies have a yellow halo around them and other staphylococci appear white. this type of culture media is: both differential and selective.
A growth medium used to cultivate bacteria is known as microbiological media or bacterial culture media. In other words, it has everything bacteria require to thrive in a lab setting and outside of the body.These are divided into six categories: enriched media, selective media, and basal media (4) Media for indicators, (5) Media for transport, and (6) Media for storage. First, BASAL MEDIA The term "basal media" refers to media that can be utilized for the growth (culture) of bacteria without the need for media enrichment.Additional media: The preparation of this medium involves adding extra components to the base medium, such as blood, serum, or egg yolk.Selective media: These media promote the development of some microorganisms while preventing the development of other bacteria. Microorganisms are isolated using an agar-based media.Differential or indicator media: When various microbial species use or interact with these components, the colonies they form take on distinct hues. Examples of these indicators include dyes and metabolic substrates.learn more about culture media here: https://brainly.com/question/26298859
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Limestone bedrock can weather and dissolve. The erosion of the limestone can result in all the following landforms except
Caverns
Ridges
Sinkholes
Underground waterways
Answer ASAP
The erosion of the limestone can result in all the following landforms except ridges.
What is weather?The term climate refers to the average weather condition of a place. It refers to the way in which the weather of a place stays over a given period of time. The weather condition of a place is known to change from time to time.
Limestone is one of the minerals that could occur at a given place. The presence of the limestone in a place is able to change or alter the landform or the arrangement of the land in a given area.
Some of these changes are very much significant and can be easily observed in an area where there is a Limestone bedrock. Landforms could be a characteristic of a place and we know that it could be used to identify a given area.
Hence, the erosion of the limestone can result in all the following landforms except ridges.
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Anabolism consists of energy-releasing reactions, such as the production of protein or fat. True or false?.
False: Anabolism consists of energy-releasing reactions, such as the production of protein or fat.
Anabolism is one of the metabolic reactions that makes up proteins or fats in the cells. It utilizes energy in this make up but not release it. Metabolism refers to the life-sustaining chemical reactions occurring in an organism. It combines both destructive and constructive reactions. There are two types of metabolic processes:
1. Catabolism
It comprises the destructive reactions of a body. It breaks down larger molecules into smaller molecules and releases energy.
2. Anabolism
It comprises the constructive processes of a body. It builds up or synthesizes large molecules from smaller molecules by the use of energy.
Fats and proteins are the macromolecules that undergo destructive metabolism or anabolism to get converted into absorbable shorter forms. Fats are broken down into fatty acids and proteins are broken down into amino acids in the intestine.
Anabolism is, therefore, a metabolic process that breaks down proteins and fats and requires energy.
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Coal deposits that are deep underground must be extracted by subsurface mining rather than by strip-mining because strip-mining would?
Coal deposits that are deep underground must be extracted by subsurface mining rather than by strip-mining because strip-mining would Require removal of large amounts of rock and soil.
The process of extracting a metal or fossil fuel from the ground is known as subsurface mining. It is the most effective and well-known mining technique. The practice of subsurface mining is beneficial for mining for gold, silver, lead, and even jewels. Throughout the West, mines have significantly harmed the ecology. Surface mining, sometimes known as "strip mining," can destroy wildlife, seriously erode the soil, impair its fertility, contaminate the water supply or drain subterranean water supplies, scar or desecrate the landscape, and harm homes, other buildings, roads, and other land features.learn more about mining here: https://brainly.com/question/1807748
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A key property of signal transduction pathways is that one signal molecule binding to a receptor protein in the cell membrane.
If you're talking about it, the answer is yes...but most of the time the answer is no
At receptors on the cell membrane, signals must be relayed through other molecules within the cell in a sort of cellular "telephone game." When a ligand binds to a cell surface receptor, the intracellular domain (part of the cell) of the receptor changes in some way. In general, it takes on a new form, activates as an enzyme or binds to other molecules. Modifying the receptor triggers a series of signaling events. For example, a receptor can turn on another signaling molecule in the cell, which in turn activates its own target. Information flow is directional, so the term upstream is often used to describe molecules or events that occur early in the relay chain, whereas the term downstream is used (for the particular molecule of interest). ) can be used to represent something that happens later. For example, receptors are downstream of ligands in the diagram, but upstream of proteins in the cytosol. Because many Molecules signaling pathways amplify the initial signal, her one molecule of ligand can lead to the activation of many molecules of downstream targets. that transmit signals are often proteins.
However, non-protein molecules such as ions and phospholipids also play important roles.
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