Cell Structure and Organization Practice Questions
NECO (Nigeria) · NECO Biology · 143 free MCQs with instant results and detailed explanations.
143
Total
37
Easy
73
Medium
33
Hard
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Sample Questions from Cell Structure and Organization
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Q1
Easy
Which part of the cell is responsible for controlling what enters and exits the cell?
A.
Cell membrane
B.
Cytoplasm
C.
Nucleus
D.
Mitochondria
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Correct Answer: A
The cell membrane regulates the movement of substances in and out of the cell, maintaining homeostasis.
Q2
Easy
Which organelle is known as the powerhouse of the cell due to its role in energy production?
A.
Golgi apparatus
B.
Ribosome
C.
Mitochondria
D.
Lysosome
Show Answer & Explanation
Correct Answer: C
Mitochondria are the sites of ATP (energy) production through cellular respiration, earning the title 'powerhouse of the cell'.
Q3
Easy
Which of the following structures is found in plant cells but not in animal cells?
A.
Cell membrane
B.
Chloroplast
C.
Nucleus
D.
Ribosome
Show Answer & Explanation
Correct Answer: B
Chloroplasts are unique to plant cells and are responsible for photosynthesis, converting light energy into chemical energy.
Q4
Medium
Which organelle is primarily responsible for the production of ATP in eukaryotic cells?
A.
Mitochondria
B.
Ribosomes
C.
Endoplasmic Reticulum
D.
Golgi Apparatus
Show Answer & Explanation
Correct Answer: A
Mitochondria are known as the powerhouse of the cell because they produce ATP through cellular respiration, making them essential for energy production.
Q5
Medium
Which component of the cell membrane is responsible for its fluidity?
A.
Cholesterol
B.
Phospholipids
C.
Proteins
D.
Carbohydrates
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Correct Answer: A
Cholesterol molecules interspersed within the phospholipid bilayer help maintain membrane fluidity and stability, especially at varying temperatures.
Q6
Medium
What distinguishes prokaryotic cells from eukaryotic cells?
A.
Presence of a nucleus
B.
Size of the cell
C.
Cell wall composition
D.
Method of reproduction
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Correct Answer: A
The key distinguishing feature between prokaryotic and eukaryotic cells is the presence of a membrane-bound nucleus in eukaryotes, whereas prokaryotes lack a true nucleus.
Q7
Medium
In plant cells, what is the function of the large central vacuole?
A.
Storage of nutrients and waste
B.
Photosynthesis
C.
Protein synthesis
D.
Cell division
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Correct Answer: A
The large central vacuole in plant cells primarily serves to store nutrients, waste products, and helps in maintaining turgor pressure, which is vital for cell structure.
Q8
Hard
Which of the following structures is responsible for the selective permeability of the cell membrane?
A.
Phospholipid bilayer
B.
Cell wall
C.
Cytoplasm
D.
Ribosomes
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Correct Answer: A
The phospholipid bilayer forms the fundamental structure of the cell membrane and is crucial for selective permeability, allowing certain molecules to pass while blocking others.
Q9
Hard
In a plant cell, which organelle is primarily involved in the synthesis of ATP during photosynthesis?
A.
Chloroplast
B.
Mitochondria
C.
Endoplasmic Reticulum
D.
Golgi Apparatus
Show Answer & Explanation
Correct Answer: A
Chloroplasts are the organelles in plant cells responsible for photosynthesis, where they convert light energy into chemical energy, producing ATP in the process.
Q10
Hard
Which of the following organelles is primarily responsible for the synthesis of ATP in eukaryotic cells?
A.
Ribosome
B.
Mitochondrion
C.
Endoplasmic Reticulum
D.
Golgi Apparatus
Show Answer & Explanation
Correct Answer: B
The mitochondrion is known as the powerhouse of the cell as it generates ATP through cellular respiration, making option B the correct answer.
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Cell Structure and Organization — NECO (Nigeria) NECO Biology Practice Questions Online
This page contains 143 practice MCQs for the chapter Cell Structure and Organization in NECO (Nigeria) NECO Biology. The questions are organized by difficulty — 37 easy, 73 medium, 33 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.