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Proteins: Building and Repairing Tissues

Description: Proteins: Building and Repairing Tissues
Number of Questions: 15
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Tags: proteins tissues building repairing
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What is the primary role of proteins in the body?

  1. Energy production

  2. Muscle contraction

  3. Building and repairing tissues

  4. Transportation of oxygen


Correct Option: C
Explanation:

Proteins are essential for building and repairing tissues, such as muscles, bones, skin, and hair.

Which amino acid is known as the "essential" amino acid?

  1. Alanine

  2. Glycine

  3. Leucine

  4. Serine


Correct Option: C
Explanation:

Leucine is an essential amino acid, meaning that it cannot be synthesized by the body and must be obtained from food.

What is the process by which proteins are broken down into amino acids called?

  1. Catabolism

  2. Anabolism

  3. Metabolism

  4. Glycolysis


Correct Option: A
Explanation:

Catabolism is the process by which proteins are broken down into amino acids, which can then be used for energy or to build new proteins.

Which hormone is responsible for stimulating protein synthesis?

  1. Insulin

  2. Glucagon

  3. Epinephrine

  4. Thyroxine


Correct Option: A
Explanation:

Insulin is a hormone that stimulates protein synthesis, which is the process by which new proteins are made.

What is the term for the process by which amino acids are linked together to form a protein?

  1. Transamination

  2. Deamination

  3. Peptide bond formation

  4. Decarboxylation


Correct Option: C
Explanation:

Peptide bond formation is the process by which amino acids are linked together to form a protein.

Which type of protein is responsible for transporting oxygen in the blood?

  1. Hemoglobin

  2. Myoglobin

  3. Collagen

  4. Keratin


Correct Option: A
Explanation:

Hemoglobin is a protein that is responsible for transporting oxygen in the blood.

What is the function of collagen in the body?

  1. Energy storage

  2. Muscle contraction

  3. Structural support

  4. Hormone production


Correct Option: C
Explanation:

Collagen is a protein that provides structural support to tissues, such as bones, tendons, and ligaments.

Which amino acid is the most abundant in the human body?

  1. Alanine

  2. Glycine

  3. Leucine

  4. Serine


Correct Option: A
Explanation:

Alanine is the most abundant amino acid in the human body.

What is the term for the process by which proteins are folded into their functional shape?

  1. Denaturation

  2. Renaturation

  3. Aggregation

  4. Precipitation


Correct Option: B
Explanation:

Renaturation is the process by which proteins are folded into their functional shape.

Which type of protein is responsible for catalyzing chemical reactions in the body?

  1. Enzymes

  2. Hormones

  3. Antibodies

  4. Transporters


Correct Option: A
Explanation:

Enzymes are proteins that catalyze chemical reactions in the body.

What is the term for the process by which proteins are unfolded and lose their structure?

  1. Denaturation

  2. Renaturation

  3. Aggregation

  4. Precipitation


Correct Option: A
Explanation:

Denaturation is the process by which proteins are unfolded and lose their structure.

Which amino acid is known as the "limiting" amino acid?

  1. Alanine

  2. Glycine

  3. Leucine

  4. Serine


Correct Option: C
Explanation:

Leucine is known as the "limiting" amino acid because it is the amino acid that is most often limiting in the diet and can limit protein synthesis.

What is the term for the process by which proteins are aggregated into larger structures?

  1. Denaturation

  2. Renaturation

  3. Aggregation

  4. Precipitation


Correct Option: C
Explanation:

Aggregation is the process by which proteins are aggregated into larger structures.

Which type of protein is responsible for transporting molecules across cell membranes?

  1. Enzymes

  2. Hormones

  3. Antibodies

  4. Transporters


Correct Option: D
Explanation:

Transporters are proteins that are responsible for transporting molecules across cell membranes.

What is the term for the process by which proteins are precipitated out of solution?

  1. Denaturation

  2. Renaturation

  3. Aggregation

  4. Precipitation


Correct Option: D
Explanation:

Precipitation is the process by which proteins are precipitated out of solution.

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