6. What is the function of DNA in cells?
a) Energy storage
b) Enzyme synthesis
c) Protein synthesis
d) Cellular respiration
Answer: c) Protein synthesis
7. Which of the following is a nucleic acid?
a) Glucose
b) Insulin
c) RNA
d) Collagen
Answer: c) RNA
8. What is the monomer unit of DNA and RNA?
a) Fatty acids
b) Nucleotides
c) Amino acids
d) Monosaccharides
Answer: b) Nucleotides
9. Which of the following is a characteristic of lipids?
a) Solubility in water
b) Polymerization into chains
c) Structural component of cell walls
d) Hydrophobic nature
Answer: d) Hydrophobic nature
10. What is the function of phospholipids in cell membranes?
a) Energy storage
b) Enzyme synthesis
c) Cell signaling
d) Formation of a lipid bilayer
Answer: d) Formation of a lipid bilayer
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