Cell Structure and OrganellesPractice Questions & MCQs
Practice Cell Structure and Organelles questions from The Fundamental Unit of Life (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Cell Structure and OrganellesQuiz - Solve & Score
Q1. Which is present only in plant cells?
- A.cell wall
- B.nucleus
- C.mitochondria
- D.cell membrane
Answer: A. cell wall
What this question tests: Cell wall is unique to plant cells. Picking the matching option: Correct. Wrong options at a glance: option B) 'nucleus' fails since Both have it; option C) 'mitochondria' is incorrect: Both have it; option D) 'cell membrane' is incorrect: Both have it. Hence the correct option is A) cell wall.
Q2. Which organelle has the function: 'release of energy (ATP) by respiration'?
- A.mitochondria
- B.chloroplast
- C.nucleus
- D.Golgi apparatus
Answer: A. mitochondria
NCERT idea this hinges on: The work-energy theorem gives W = F * s * cos(theta) for a constant force; when the force and displacement align, W = F * s => substituting the data yields the quoted result; hence the answer is mitochondria. Applying this to the choices: Correct. Where the distractors go off: option B) 'chloroplast' is incorrect: chloroplast: photosynthesis (traps light energy); option C) 'nucleus' is incorrect: nucleus: controls cell activities; stores DNA; option D) 'Golgi apparatus' doesn't hold - Golgi apparatus: packaging and dispatch of materials. So the correct option is A) mitochondria.
Q3. Which organelle has the function: 'synthesis of proteins'?
- A.ribosome
- B.nucleus
- C.Golgi apparatus
- D.lysosome
Answer: A. ribosome
The core fact here is - Identify the defining feature of the structure/tissue named in the question; match that feature against the four options => only one option is consistent with the textbook description; therefore the correct identification = ribosome. That fits the listed correct option directly - Correct. Quickly on the wrong ones: option B) 'nucleus' fails since nucleus: controls cell activities; stores DNA; option C) 'Golgi apparatus' fails since Golgi apparatus: packaging and dispatch of materials. Hence the answer is A) ribosome.
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Yes. These Cell Structure and Organelles important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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