16. What is the main energy currency in cells?
a) ATP
b) NADH
c) FADH2
d) ADP
Answer: a) ATP
17. Which of the following is a reducing sugar?
a) Glucose
b) Sucrose
c) Fructose
d) Lactose
Answer: a) Glucose
18. Which of the following is an example of an essential amino acid?
a) Alanine
b) Serine
c) Leucine
d) Glycine
Answer: c) Leucine
19. What is denaturation of a protein?
a) The breaking of peptide bonds
b) The unfolding of a protein’s secondary structure
c) The interaction of multiple proteins to form a complex
d) The binding of a protein to its substrate
Answer: b) The unfolding of a protein’s secondary structure
20. Which of the following is an example of a monosaccharide?
a) Sucrose
b) Starch
c) Fructose
d) Cellulose
Answer: c) Fructose
