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The Fundamental Unit of Life Practice Questions

Class 9 · Science · 3467 free MCQs with instant results and detailed explanations.

3467
Total
869
Easy
1904
Medium
694
Hard

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Topics in The Fundamental Unit of Life

Cell Division 1578
Cell Organelles 1266
Cell Theory 623

Sample Questions from The Fundamental Unit of Life

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Q1
Easy
Which organelle is known as the powerhouse of the cell?
A. Mitochondria
B. Chloroplast
C. Nucleus
D. Ribosome
Show Answer & Explanation
Correct Answer: A
Mitochondria are known as the powerhouse of the cell as they generate ATP, the energy currency.
Q2
Easy
What is the function of the cell membrane?
A. Energy production
B. Control entry and exit of substances
C. Protein synthesis
D. Photosynthesis
Show Answer & Explanation
Correct Answer: B
The cell membrane regulates what enters and exits the cell, maintaining homeostasis.
Q3
Easy
Which organelle is responsible for protein synthesis?
A. Nucleus
B. Ribosome
C. Lysosome
D. Golgi apparatus
Show Answer & Explanation
Correct Answer: B
Ribosomes are the sites of protein synthesis, translating messenger RNA into proteins.
Q4
Medium
Which organelle is known as the powerhouse of the cell?
A. Mitochondria
B. Ribosome
C. Endoplasmic Reticulum
D. Golgi Apparatus
Show Answer & Explanation
Correct Answer: A
Mitochondria are known as the powerhouse of the cell because they generate ATP, the energy currency of the cell, through cellular respiration.
Q5
Medium
What is the function of ribosomes in a cell?
A. DNA replication
B. Protein synthesis
C. Energy production
D. Waste removal
Show Answer & Explanation
Correct Answer: B
Ribosomes are the cellular structures responsible for synthesizing proteins by translating messenger RNA.
Q6
Medium
Which organelle is responsible for modifying, sorting, and packaging proteins?
A. Nucleus
B. Golgi Apparatus
C. Lysosome
D. Chloroplast
Show Answer & Explanation
Correct Answer: B
The Golgi apparatus modifies proteins received from the endoplasmic reticulum and then sorts and packages them for transport.
Q7
Medium
Which of the following organelles contains enzymes for digestion?
A. Vacuole
B. Lysosome
C. Peroxisome
D. Ribosome
Show Answer & Explanation
Correct Answer: B
Lysosomes contain digestive enzymes that break down waste materials and cellular debris.
Q8
Hard
Which organelle is primarily responsible for ATP production in the cell?
A. Mitochondria
B. Chloroplast
C. Ribosome
D. Endoplasmic Reticulum
Show Answer & Explanation
Correct Answer: A
Mitochondria are known as the powerhouse of the cell as they generate ATP, the energy currency.
Q9
Hard
Which of the following organelles is involved in the synthesis of lipids?
A. Rough Endoplasmic Reticulum
B. Smooth Endoplasmic Reticulum
C. Golgi Apparatus
D. Lysosome
Show Answer & Explanation
Correct Answer: B
Smooth Endoplasmic Reticulum is involved in lipid synthesis and detoxification processes.
Q10
Hard
Which of the following processes is NOT carried out by ribosomes?
A. Protein synthesis
B. DNA replication
C. Translation
D. Polypeptide formation
Show Answer & Explanation
Correct Answer: B
Ribosomes synthesize proteins by translating mRNA but do not partake in DNA replication.

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The Fundamental Unit of Life — Class 9 Science Practice Questions Online

This page contains 3467 practice MCQs for the chapter The Fundamental Unit of Life in Class 9 Science. The questions are organized by difficulty — 869 easy, 1904 medium, 694 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. This chapter covers 3 topics, giving you comprehensive coverage of the entire chapter.