Proteins have a variety of functions within a living cell. Describe at least three of the possible functions of proteins, and explain how proteins can be so diverse when there are only a limited number of different amino acids.

Answers

Answer 1

Answer: anonymous 3 years agoProteins are involved in almost all of the cell's functions. They can act as: Transportation: they can transport hydrophobic molecules in blood for example Regulation: protein hormones and enzymes Receptor: can act as receptors on cell surface and in the subsequent signal transduction (G-protein for instance) It is true that all proteins are made up of up to 20 amino acids, but there are several reasons for their diverse actions: -One reason is the possible sequence and number of amino acids: Met-Ser-His is different from Met-His-Ser for example. Besides, you have different chain length, for a protein is made up of long chain of polypeptide (longer than 50-70 amino acids) and can have any of the 20 amino acids with repetition, so using simple probability, this can provide up to practically unlimited combination with proteins that have chains of thousands of amino acids. -Another very crucial reason for the diversity of protein action is the conformation. A protein passes by at least 3 conformational stages before becoming mature. The straight amino acid chain is the primary structure of the protein that can never be active. Spatial modification of this primary structure results in a secondary structure, Helix or Beta-pleated sheets (or other coiling structure), that is also inactive. Further coiling and bending of the secondary structure produce a 3-dimentional conformation that is the active form of the protein. Moreover, many proteins can undergo further conformational rearrangement and combination with other protein sub-units producing a quaternary structure.

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Explain the purpose of a quick body response like pulling a hand away from a hot stove

Answers

The purpose of a quick body response is from your brain. Your brain has a nervous system that can tell you to do things that you should.
In this case, Pulling your hand away from a hot stove could be dangerous, so you nervous system quickly reacts to take your hand away from the stove.

If you are administering a drug with a dosing rate of 50 mg/kg to a patient with a mass of 50 kg, how many mg of drug do you need to deliver to the patient?O 25 mg
O 2,500 mg
O 250 mg
O 2.5 mg
O 50 mg

Answers

0.330 and the 3 is what you rounded up

Final answer:

To calculate the dosage of a drug given in mg/kg for a person, multiply the dosing rate by the person's mass. In this case, the dosing rate is 50 mg/kg and the mass of the person is 50 kg, yielding a total dosage of 2,500 mg.

Explanation:

When administering a drug with a dosing rate that is given in mg/kg, you need to multiply the dosing rate by the patient's mass to determine the proper dosage. In this case, we use the formula:

Dose = Dosing rate × mass

Substituting the given values into the formula:

Dose = 50 mg/kg × 50 kg, which equals to 2,500 mg.

Therefore, you need to administer 2,500 mg of the drug to the patient.

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A pea plant that has round seeds has the genotype Rr. It is crossed with a pea plant that has wrinkled seeds and the genotype rr. What is the probability that the offspring will have wrinkled seeds?

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Answer: The probability that the offspring will have wrinklied seeds is 50%.

Final answer:

When a pea plant with the genotype Rr is crossed with a pea plant with the genotype rr, there is a 50% probability that the offspring will have wrinkled seeds.

Explanation:

The genotype of the pea plant with round seeds is Rr, while the genotype of the pea plant with wrinkled seeds is rr. When these two plants are crossed, the offspring will inherit one allele from each parent. Since the genotype of the round-seeded plant has both a dominant and a recessive allele, and the genotype of the wrinkled-seeded plant has only recessive alleles, there is a 50% probability that the offspring will have wrinkled seeds.

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The finches that Darwin studied in the Galapagos islands have evolved with different types of beaks: drilling, cracking, tearing, and fishing. This is an example ofA) predation.
B) adaptive radiation.
C) warning coloration.
D) protective resemblance.

Answers

Answer: The correct answer is Adaptive radiation.

Adaptive radiation can be defined as the diversification of organisms having common ancestor that later on become adapted to different environmental conditions.

Due to different environmental conditions, these organisms evolve and become diversified to more specialized types.

For instance, Darwin's finches on the Galapagos islands evolved with different beak types ( like drilling, cracking, tearing, and fishing) due to availability of different types of food.

Therefore, they are example of adaptive radiation.

B) Adaptive radiation
Adaptive radiation is when organisms diversify rapidly from an ancestral species into multiple new forms.

Predict which of the following can impact an ecosystem's available resources?

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Answer:Long term drought, change of season from winter to summer, forest fire are unfavorable environmental factors which can deplete the amount of resources already available with the ecosystem. The long term drought will be a condition in which the ecosystem will suffer from non-availability of water.

Explanation:

Read the sentence and answer the question below:The silence of the night screamed frightfully in my ears.

Which of the following correctly describes this phrase?

A) Silence that screams is a paradox.
B) Silence of the night is a metaphor.
C) Screamed frightfully is a hyperbole.
D) Screamed in my ears is a simile.

Answers

The correct answer is C) Screamed frightfully is a hyperbole.

In the sentence, The silence of the night screamed frightfully in my ears, silence of the night is a personification. So choice B is not correct. Silence that screams is also a personification so choice A is not correct. So the correct answer is C. Screamed frightfully is a hyperbole. I hope this answer helped you.

I would think A, because the "silence" "screamed frightfully" and screaming is the paradox of silence.

Other Questions

Please help!High School Earth and Space Science Semester B (EdOptions Academy users)Course Activity: Comparing Energy Resources Part DManagement of natural resources can affect the sustainability of human populations. For example, consider an effort to decontaminate a small village’s water supply. This effort is projected to increase the carrying capacity from an initial population of 400 people (P = 400) to 450 people (K = 450) during the course of 10 years (x = 10). Use the simulation to determine the growth rate r of the population in this village. Round your answer to the nearest whole number. (Hint: Use the tool's zoom feature to get a closer look at the curve.)(view image for graph)Part ETechnological advancements can help make consumption and management of natural resources more sustainable, as discussed in part C. As technology enhances renewable, sustainable energy sources, how will this likely affect the carrying capacity and growth rate of the human population over time?Part FRead this below about biodiversity, and then answer the following question.“The Midwest is helping to pioneer the biofuel movement in the United States. Burning biomass—a natural resource—for fuel doesn’t emit additional CO2 into the atmosphere. However, biofuel production reduces the area’s biodiversity because corn, which is a primary source of biomass, is overplanted. Grasslands and fields once inhabited by a large variety of flowers, grasses, insects, and pollinators are being cleared as the demand for corn increases. The impact of eliminating these species and decreasing the area’s biodiversity then spreads as other plants and crops that relied on the insects and pollinators are threatened. These negative consequences can then magnify throughout the ecosystem.”If an ecosystem is no longer able to sustain its biodiversity, what potential impact could that fact have on the carrying capacity and growth rate of the human population over time? As you answer, think about how the energy is transferred through an ecosystem.Part GWrite one to two paragraphs describing the relationship between the management of natural resources, the sustainability of the human population, and biodiversity. Use your work from parts A through F to guide you.

How much of the world's plastic ends up on the ocean

A student has written a paper about a deer population that was separated when a canyon developed between members of the group. In her paper, she showed that the two groups adapted differently and can no longer interbreed. What would be the best title for her paper?

All materials within ecosystems can be recycled.