NEET-UG Biology · Class 11
Mitochondria, plastids and ribosomes — NEET & JEE Questions
Mitochondria, plastids and ribosomes is a topic in Cell: The Unit of Life, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 13 published NEET-UG questions on Mitochondria, plastids and ribosomes, each with the marking scheme of the real paper.
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Mitochondria, plastids and ribosomes MCQs with solutions
10 of the 13 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Where does oxidative phosphorylation occur in a mitochondrion?
- A. Inner mitochondrial membrane
- B. Outer mitochondrial membrane
- C. Matrix only
- D. Intermembrane space only
Why are mitochondria and chloroplasts described as semi-autonomous organelles?
- A. They contain their own DNA and ribosomes but still depend on nuclear genes
- B. They function completely independently of the cell
- C. They contain no proteins encoded by nuclear genes
- D. They reproduce only when the entire cell divides
From the statements given below choose the correct option : A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80 S ribosome are 60 S and 40 S while that of 70 S are 50 S and 30 S . D. The two sub-units of 80 S ribosome are 60 S and 20 S and that of 70 S are 50 S and 20 S . E. The two sub-units of 80 S are 60 S and 30 S and that of 70 S are 50 S and 30 S .
- A. A, B, E are true
- B. B, D, E are true
- C. A, B, C are true
- D. A, B, D are true
Which organelles are both semiautonomous and contain their own DNA and ribosomes?
- A. Mitochondria and plastids
- B. Golgi bodies and lysosomes
- C. Endoplasmic reticulum and vacuoles
- D. Peroxisomes and centrosomes
A cell contains numerous chloroplasts with extensive thylakoid membranes. Which activity is most directly supported by these structures?
- A. Light-dependent reactions of photosynthesis
- B. Protein digestion
- C. Chromosome movement
- D. Lipid storage
An antibiotic specifically blocks 70S ribosomes. Which cellular structures in a eukaryotic plant cell could be directly affected?
- A. Mitochondria and chloroplasts
- B. Golgi apparatus and lysosomes
- C. Nucleus and smooth ER
- D. Peroxisomes and vacuoles
Non-membrane bound cell organelles found in both prokaryotic and eukaryotic cells are .
- A. Ribosomes
- B. Lysosomes
- C. Centrosomes
- D. Mitochondria
How many different proteins does the ribosome consist of?
- A. 60
- B. 40
- C. 20
- D. 80
Which of the following statements about inclusion bodies is incorrect?
- A. These are involved in ingestion of food particles
- B. They lie free in the cytoplasm
- C. These represent reserve material in cytoplasm
- D. They are not bound by any membrane
A cell organelle has an inner membrane folded into cristae and contains enzymes of aerobic respiration. It is a
- A. mitochondrion
- B. chloroplast
- C. lysosome
- D. Golgi apparatus
Common mistakes in Mitochondria, plastids and ribosomes
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Using the presence of internal membranes alone and overlooking the diagnostic structures.
- Places the Calvin cycle itself in the thylakoid membrane rather than the stroma.
- Assumes all ribosomes in a eukaryotic cell are structurally identical.
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