mcq

A Level MCQs on Proteins

1. Which of the following is the monomer unit of proteins?

Correct Answer: B) Amino acid

2. Which bond is formed between two amino acids in a protein?

Correct Answer: C) Peptide bond

3. Which level of protein structure is determined by the sequence of amino acids?

Correct Answer: A) Primary

4. Which of the following is NOT a function of proteins?

Correct Answer: B) Energy storage

5. Hemoglobin is an example of which level of protein structure?

Correct Answer: D) Quaternary

6. Which of the following statements about enzymes is correct?

Correct Answer: B) Enzymes speed up chemical reactions

7. Which of the following is a fibrous protein?

Correct Answer: B) Collagen

8. What is the effect of high temperature on most proteins?

Correct Answer: A) Denaturation

9. Which element is always present in proteins but not in carbohydrates or lipids?

Correct Answer: C) Nitrogen

10. Which of the following is NOT a component of an amino acid?

Correct Answer: C) Phosphate group