1. Which of the following is true about the light-independent reactions
of photosynthesis?
A. They occur in the mitochondria.
B. They require light to produce glucose.
C. They produce oxygen as a byproduct.
D. Th
Answer: D) They occur in the stroma of the chloroplast
Rationale: The light-independent reactions, also known as the Calvin
cycle, occur in the stroma of the chloroplast, where carbon fixation and
glucose production take place.
2. What is the main role of tRNA in protein synthesis?
A. To form the ribosome
B. To carry amino acids to the ribosome
C. To create the mRNA template
D. To synthesize ATP
Answer: B) To carry amino acids to the ribosome
Rationale: Transfer RNA (tRNA) transports amino acids to the
ribosome, where they are added to the growing polypeptide chain
during translation.
,3. 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.
4. Which of the following is a type of passive transport?
A. Active transport
B. Osmosis
C. Endocytosis
D. Exocytosis
Answer: B) Osmosis
Rationale: Osmosis is a type of passive transport where water
molecules move from a region of lower solute concentration to a region
of higher solute concentration, requiring no energy.
5. 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.
6. Which of the following is an example of a polysaccharide?
A. Glucose
B. Sucrose
C. Cellulose
D. Amino acid
Answer: C) Cellulose
Rationale: Cellulose is a polysaccharide made of long chains of glucose
molecules and is an important structural component of plant cell walls.
7. Which of the following is true about enzymes?
A. Enzymes increase the activation energy of reactions.
B. Enzymes are consumed during reactions.
C. Enzymes can be reused after catalyzing a reaction.
D. Enzymes are always proteins.
Answer: C) Enzymes can be reused after catalyzing a reaction.
of photosynthesis?
A. They occur in the mitochondria.
B. They require light to produce glucose.
C. They produce oxygen as a byproduct.
D. Th
Answer: D) They occur in the stroma of the chloroplast
Rationale: The light-independent reactions, also known as the Calvin
cycle, occur in the stroma of the chloroplast, where carbon fixation and
glucose production take place.
2. What is the main role of tRNA in protein synthesis?
A. To form the ribosome
B. To carry amino acids to the ribosome
C. To create the mRNA template
D. To synthesize ATP
Answer: B) To carry amino acids to the ribosome
Rationale: Transfer RNA (tRNA) transports amino acids to the
ribosome, where they are added to the growing polypeptide chain
during translation.
,3. 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.
4. Which of the following is a type of passive transport?
A. Active transport
B. Osmosis
C. Endocytosis
D. Exocytosis
Answer: B) Osmosis
Rationale: Osmosis is a type of passive transport where water
molecules move from a region of lower solute concentration to a region
of higher solute concentration, requiring no energy.
5. 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.
6. Which of the following is an example of a polysaccharide?
A. Glucose
B. Sucrose
C. Cellulose
D. Amino acid
Answer: C) Cellulose
Rationale: Cellulose is a polysaccharide made of long chains of glucose
molecules and is an important structural component of plant cell walls.
7. Which of the following is true about enzymes?
A. Enzymes increase the activation energy of reactions.
B. Enzymes are consumed during reactions.
C. Enzymes can be reused after catalyzing a reaction.
D. Enzymes are always proteins.
Answer: C) Enzymes can be reused after catalyzing a reaction.
