1. During which process is mRNA synthesized?
A. Translation
B. Transcription
C. Replication
D. Transformation
Answer: B) Transcription
Rationale: Transcription is the process by which messenger RNA
(mRNA) is synthesized from a DNA template.
2. What is the primary role of NAD+ in cellular respiration?
A. To transport electrons
B. To synthesize ATP
C. To provide energy for muscle contraction
D. To store glucose
Answer: A) To transport electrons
Rationale: NAD+ acts as an electron carrier, accepting electrons during
glycolysis and the Krebs cycle to form NADH, which is used in the
electron transport chain to produce ATP.
3. What is the final electron acceptor in the electron transport chain?
,A. Oxygen
B. NADH
C. Glucose
D. Carbon dioxide
Answer: A) Oxygen
Rationale: Oxygen acts as the final electron acceptor in the electron
transport chain, combining with electrons and protons to form water.
4. Which of the following is a difference between prokaryotic and
eukaryotic cells?
A. Prokaryotic cells have a nucleus; eukaryotic cells do not.
B. Eukaryotic cells have a cell membrane; prokaryotic cells do not.
C. Prokaryotic cells lack membrane-bound organelles; eukaryotic cells
have them.
D. Prokaryotic cells are larger than eukaryotic cells.
Answer: C) Prokaryotic cells lack membrane-bound organelles;
eukaryotic cells have them.
Rationale: Eukaryotic cells contain membrane-bound organelles (like
the nucleus), while prokaryotic cells lack these structures.
5. Which of the following best describes a genotype?
A. The physical appearance of an organism
B. The sequence of nitrogenous bases in a gene
, C. The genetic makeup of an organism
D. The number of chromosomes in a cell
Answer: C) The genetic makeup of an organism
Rationale: A genotype refers to the genetic constitution of an organism,
specifically the alleles present for a given gene.
6. Which of the following is the function of the cytoskeleton?
A. Protein synthesis
B. Energy production
C. Cell shape and movement
D. DNA replication
Answer: C) Cell shape and movement
Rationale: The cytoskeleton provides structural support to the cell,
helping maintain its shape and enabling cellular movement.
7. What is the term for a segment of DNA that codes for a specific
protein?
A. Chromosome
B. Gene
C. Codon
D. Allele
Answer: B) Gene
A. Translation
B. Transcription
C. Replication
D. Transformation
Answer: B) Transcription
Rationale: Transcription is the process by which messenger RNA
(mRNA) is synthesized from a DNA template.
2. What is the primary role of NAD+ in cellular respiration?
A. To transport electrons
B. To synthesize ATP
C. To provide energy for muscle contraction
D. To store glucose
Answer: A) To transport electrons
Rationale: NAD+ acts as an electron carrier, accepting electrons during
glycolysis and the Krebs cycle to form NADH, which is used in the
electron transport chain to produce ATP.
3. What is the final electron acceptor in the electron transport chain?
,A. Oxygen
B. NADH
C. Glucose
D. Carbon dioxide
Answer: A) Oxygen
Rationale: Oxygen acts as the final electron acceptor in the electron
transport chain, combining with electrons and protons to form water.
4. Which of the following is a difference between prokaryotic and
eukaryotic cells?
A. Prokaryotic cells have a nucleus; eukaryotic cells do not.
B. Eukaryotic cells have a cell membrane; prokaryotic cells do not.
C. Prokaryotic cells lack membrane-bound organelles; eukaryotic cells
have them.
D. Prokaryotic cells are larger than eukaryotic cells.
Answer: C) Prokaryotic cells lack membrane-bound organelles;
eukaryotic cells have them.
Rationale: Eukaryotic cells contain membrane-bound organelles (like
the nucleus), while prokaryotic cells lack these structures.
5. Which of the following best describes a genotype?
A. The physical appearance of an organism
B. The sequence of nitrogenous bases in a gene
, C. The genetic makeup of an organism
D. The number of chromosomes in a cell
Answer: C) The genetic makeup of an organism
Rationale: A genotype refers to the genetic constitution of an organism,
specifically the alleles present for a given gene.
6. Which of the following is the function of the cytoskeleton?
A. Protein synthesis
B. Energy production
C. Cell shape and movement
D. DNA replication
Answer: C) Cell shape and movement
Rationale: The cytoskeleton provides structural support to the cell,
helping maintain its shape and enabling cellular movement.
7. What is the term for a segment of DNA that codes for a specific
protein?
A. Chromosome
B. Gene
C. Codon
D. Allele
Answer: B) Gene
