Q. What is the primary component of the cell wall in plant cells?
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A.
Cellulose
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B.
Chitin
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C.
Peptidoglycan
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D.
Lipid
Solution
The cell wall of plant cells is primarily made of cellulose, providing structural support.
Correct Answer: A — Cellulose
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Q. What is the primary function of the cell membrane?
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A.
To provide energy to the cell
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B.
To control the movement of substances in and out of the cell
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C.
To store genetic information
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D.
To synthesize proteins
Solution
The cell membrane regulates what enters and exits the cell, maintaining homeostasis.
Correct Answer: B — To control the movement of substances in and out of the cell
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Q. What is the role of ribosomes in a cell?
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A.
Energy production
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B.
Protein synthesis
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C.
DNA replication
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D.
Cell division
Solution
Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.
Correct Answer: B — Protein synthesis
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Q. What structure is selectively permeable and surrounds the cell?
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A.
Cell wall
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B.
Cytoplasm
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C.
Cell membrane
-
D.
Nucleus
Solution
The cell membrane is selectively permeable, allowing certain substances to pass while blocking others.
Correct Answer: C — Cell membrane
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Q. Which of the following is NOT a function of the smooth endoplasmic reticulum?
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A.
Lipid synthesis
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B.
Detoxification of drugs
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C.
Protein synthesis
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D.
Calcium ion storage
Solution
The smooth endoplasmic reticulum is involved in lipid synthesis, detoxification, and calcium storage, but not protein synthesis.
Correct Answer: C — Protein synthesis
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Q. Which of the following structures is involved in the synthesis of ribosomal RNA?
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A.
Nucleus
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B.
Ribosome
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C.
Golgi apparatus
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D.
Endoplasmic reticulum
Solution
The nucleolus, located within the nucleus, is responsible for synthesizing ribosomal RNA.
Correct Answer: A — Nucleus
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Q. Which organelle is involved in the synthesis of ribosomal RNA?
-
A.
Nucleus
-
B.
Nucleolus
-
C.
Rough endoplasmic reticulum
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D.
Golgi apparatus
Solution
The nucleolus is responsible for synthesizing ribosomal RNA (rRNA) and assembling ribosomes.
Correct Answer: B — Nucleolus
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Q. Which organelle is responsible for producing ATP?
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A.
Nucleus
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B.
Ribosome
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C.
Mitochondria
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D.
Endoplasmic Reticulum
Solution
Mitochondria are known as the powerhouse of the cell, where ATP is produced through cellular respiration.
Correct Answer: C — Mitochondria
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Q. Which part of the cell is responsible for packaging and modifying proteins?
-
A.
Golgi apparatus
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B.
Lysosome
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C.
Nucleus
-
D.
Mitochondria
Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
Correct Answer: A — Golgi apparatus
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Q. Which structure is found in plant cells but not in animal cells?
-
A.
Cell membrane
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B.
Mitochondria
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C.
Chloroplasts
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D.
Ribosomes
Solution
Chloroplasts are found in plant cells and are responsible for photosynthesis, while animal cells do not have them.
Correct Answer: C — Chloroplasts
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