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3 years ago

List 5 uses for proteins in the cell.

Biology

1 answer:

sasho [114]3 years ago

6 0

Answer:

Protein has many roles in your body. It helps repair and build your body’s tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance. Finally, they keep your immune system strong, transport and store nutrients and can act as an energy source, if needed.

Explanation:

Hope this helped Mark BRAINLIEST!!!

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Which diagrams shows reaction pathway that absorbs energy?

postnew [5]

Question:

The diagram shows the potential energy changes for a reaction pathway.

Part 1: Does the diagram illustrate an endothermic or an exothermic reaction? Give reasons in support of your answer.

Part 2: Describe how you can determine the total change in enthalpy and activation energy from the diagram and if each is positive or negative.

Answer:

Part 1: The diagram illustrates an endothermic reaction as the products has a higher potential energy than the reactants do. There is a positive slope of the diagram and there is enough energy to meet the activation energy requirement.

Part 2: You can determine the total change in enthalpy and activation energy from the diagram by the potential energy of the reactants. If the reactants have a high potential energy, then the enthalpy is also high, and if the reactants have a low potential energy, then the enthalpy is low. You can determine if the diagram is positive or negative by knowing if its an endothermic or exothermic reaction. An endothermic reaction is positive because the products are higher than the reactants and a exothermic reaction is negative because the reactants are higher than the products.

8 0

3 years ago

50 POINTS

lapo4ka [179]

City-state government was often conquered because they did not have enough resources to protect themselves

Explanation:

A city-state government is an independent autonomic political system which usually compromises just a single independent city which is governed by itself with sovereignty over its territory. The city-states like Greece, Italy, and Rome etc became very powerful.

The main reason for these city-states being conquered more was the accumulation of wealth and aristocracy in such states.

Heavy taxes, religion, slavery also lead to social unrest and conflicts among these city-states which made them weaker. These internal conflicts also made them lose their resources and vulnerable to be conquered by other powerful empires.

With the increasing power of neighboring states, like in the case of Rome and Greece, the Romans became mightier than Greeks at one point and conquered the Greek city-states.

6 0

3 years ago

7. a) How does adaptation affect the diversity of a species?

Tems11 [23]

Explanation:

Adaptations generally occur in order to increase the fitness and thus survival of organisms. By being able to adapt to the changing environment, organisms are better able to survive and reproduce. ... Many people are under the impression that species require thousands or even millions of years to adapt.

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4 0

3 years ago

Read 2 more answers

Which of the following statements is most correct regarding the intracellular chemical signals known as "second messengers"? Sel

Mila [183]

Answer:

Cyclic AMP and calcium may be second messengers.

Explanation:

these are signalling molecules that are located inside the cells,They are releases when cells are in contact with signals from an extracellular molecule. the extracellular molecules that cause the chemical reaction in an external environment in the second messenger are called first messenger.

the basic mechanisms of second messenger involve the binding of ligands to the cell membrane receptors( usually a trans membrane protein).causing conformational change in the receptor protein. The latter change affect the structural and functional activities of the receptors protein with a consequent production of second messenger,

Response of the cells to the first messenger my cause different form of cellular reactions; the cells may undergo depolarization with influx of out flux of ions, differentiate to specialized cells or migrate to another location.

Examples of first messenger are hormones and neurotransmitters, while calcium ions, cyclic GMP,AMP, diaclyglycerol are examples of first messengers.

Most first messengers are peptide hormones.Some may be streroid, However, the hydrophilic nature of the peptide hormone restrict their movement, at the cell membranes. Therefore most first messengers made of peptide are first converted to second messenger to bring about their signalling effects.The usually mark the beginning of cascade events by second messengers.

Second messengers are usually classified based on their polarity and molecular form this include the

hydrophobic molecules ;diacyglecerol,phosphatdylinotisols. These diffuse through the membrane into intramembrane space of cells cause signalling effects in the cell.

the hydrophiliic molecules are located in the cystol of cells. Example are Cylic AMP. GMP, Calcium,

N02, CO,H2S are polar molecules that easily diffuse into the cells to cause signalling effects, they are the third Classification of second messengers.

6 0

3 years ago

Read 2 more answers

which combination of alleles could be produced in a gamete of an individual that has the genotype AaBbcc? A) abc B) AB C) Aa D)

qwelly [4]

Answer:b. AB

Explanation:

5 0

3 years ago