WGU C785 BIOCHEMISTRY FINAL EXAM
QUESTIONS AND CORRECT AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026-
2027|INSTANT DOWNLOAD
1. Which element is found in all organic molecules?
A. Calcium
B. Nitrogen
C. Carbon
D. Sodium
Correct Answer: C. Carbon
Rationale: Carbon forms four covalent bonds, allowing it to
build the complex structures that make up all organic
compounds.
2. Which type of bond holds amino acids together in proteins?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Glycosidic bond
Correct Answer: C. Peptide bond
,Rationale: Peptide bonds form through dehydration synthesis
between amino acids.
3. What is the primary function of enzymes?
A. Store energy
B. Increase activation energy
C. Speed up chemical reactions
D. Produce ATP directly
Correct Answer: C. Speed up chemical reactions
Rationale: Enzymes are biological catalysts that lower
activation energy.
4. Which carbohydrate serves as the main energy source for
human cells?
A. Fructose
B. Lactose
C. Glucose
D. Cellulose
Correct Answer: C. Glucose
Rationale: Glucose is the preferred fuel for most tissues.
,5. Which organ primarily regulates blood glucose levels
through glycogen storage?
A. Heart
B. Liver
C. Kidney
D. Spleen
Correct Answer: B. Liver
Rationale: The liver stores glycogen and releases glucose when
needed.
6. ATP is best described as the cell's:
A. Hormone
B. Structural protein
C. Energy currency
D. Vitamin
Correct Answer: C. Energy currency
Rationale: ATP stores and transfers usable energy within cells.
7. Glycolysis occurs in the:
A. Nucleus
B. Cytoplasm
, C. Mitochondria
D. Golgi apparatus
Correct Answer: B. Cytoplasm
Rationale: Glycolysis takes place in the cytosol.
8. Which coenzyme is primarily reduced during glycolysis?
A. FAD
B. NAD⁺
C. CoA
D. ATP
Correct Answer: B. NAD⁺
Rationale: NAD⁺ accepts electrons and becomes NADH.
9. Which vitamin is required to synthesize NAD⁺?
A. Vitamin C
B. Niacin
C. Vitamin D
D. Vitamin K
Correct Answer: B. Niacin
Rationale: Niacin (Vitamin B3) is the precursor of NAD⁺.
QUESTIONS AND CORRECT AND CORRECT
ANSWERS (VERIFIED ANSWERS) Q&A 2026-
2027|INSTANT DOWNLOAD
1. Which element is found in all organic molecules?
A. Calcium
B. Nitrogen
C. Carbon
D. Sodium
Correct Answer: C. Carbon
Rationale: Carbon forms four covalent bonds, allowing it to
build the complex structures that make up all organic
compounds.
2. Which type of bond holds amino acids together in proteins?
A. Hydrogen bond
B. Ionic bond
C. Peptide bond
D. Glycosidic bond
Correct Answer: C. Peptide bond
,Rationale: Peptide bonds form through dehydration synthesis
between amino acids.
3. What is the primary function of enzymes?
A. Store energy
B. Increase activation energy
C. Speed up chemical reactions
D. Produce ATP directly
Correct Answer: C. Speed up chemical reactions
Rationale: Enzymes are biological catalysts that lower
activation energy.
4. Which carbohydrate serves as the main energy source for
human cells?
A. Fructose
B. Lactose
C. Glucose
D. Cellulose
Correct Answer: C. Glucose
Rationale: Glucose is the preferred fuel for most tissues.
,5. Which organ primarily regulates blood glucose levels
through glycogen storage?
A. Heart
B. Liver
C. Kidney
D. Spleen
Correct Answer: B. Liver
Rationale: The liver stores glycogen and releases glucose when
needed.
6. ATP is best described as the cell's:
A. Hormone
B. Structural protein
C. Energy currency
D. Vitamin
Correct Answer: C. Energy currency
Rationale: ATP stores and transfers usable energy within cells.
7. Glycolysis occurs in the:
A. Nucleus
B. Cytoplasm
, C. Mitochondria
D. Golgi apparatus
Correct Answer: B. Cytoplasm
Rationale: Glycolysis takes place in the cytosol.
8. Which coenzyme is primarily reduced during glycolysis?
A. FAD
B. NAD⁺
C. CoA
D. ATP
Correct Answer: B. NAD⁺
Rationale: NAD⁺ accepts electrons and becomes NADH.
9. Which vitamin is required to synthesize NAD⁺?
A. Vitamin C
B. Niacin
C. Vitamin D
D. Vitamin K
Correct Answer: B. Niacin
Rationale: Niacin (Vitamin B3) is the precursor of NAD⁺.
