50 Most Important NEET PYQs of Chapter 8: Cell - The Unit of Life – Part 2 (Q26–50) | By neetpyqall

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🧬 50 Most Important NEET PYQs of Chapter 8: Cell - The Unit of Life – Part 2 (Q26–50) | By neetpyqall

Let's continue from question 26 to 50 with detailed solutions, helping you solidify your command over this crucial NEET chapter!

26. Mitochondria and chloroplasts are believed to be semi-autonomous organelles because they:

A) Are found only in plant cells
B) Can produce some of their own proteins
C) Are not bounded by membranes
D) Work independently of the cell
✅ Answer: B) Can produce some of their own proteins
Explanation: Mitochondria and chloroplasts have their own DNA and ribosomes, enabling them to synthesize some proteins independently.

27. Which of the following organelles is associated with photorespiration?

A) Lysosome
B) Mitochondria
C) Peroxisome
D) Golgi complex
✅ Answer: C) Peroxisome
Explanation: Peroxisomes play a crucial role in the process of photorespiration in plants.

28. Nucleolus is the site of:

A) DNA synthesis
B) mRNA synthesis
C) rRNA synthesis
D) tRNA synthesis
✅ Answer: C) rRNA synthesis
Explanation: The nucleolus synthesizes ribosomal RNA (rRNA) and assembles ribosomal subunits.

29. Which of the following organelles is not found in animal cells?

A) Mitochondria
B) Centrosome
C) Plastid
D) Endoplasmic Reticulum
✅ Answer: C) Plastid
Explanation: Plastids like chloroplasts are only found in plant cells.

30. Cristae are found in:

A) Golgi apparatus
B) Nucleus
C) Endoplasmic reticulum
D) Mitochondria
✅ Answer: D) Mitochondria
Explanation: Cristae are folds of the inner mitochondrial membrane, increasing surface area for ATP production.

31. Which organelle is most involved in glycosylation of proteins?

A) Ribosome
B) Golgi apparatus
C) Nucleus
D) SER
✅ Answer: B) Golgi apparatus
Explanation: Golgi bodies process and modify proteins by adding sugar groups in glycosylation.

32. The major site for synthesis of lipids is:

A) RER
B) SER
C) Ribosome
D) Nucleus
✅ Answer: B) SER
Explanation: Smooth Endoplasmic Reticulum synthesizes lipids, including phospholipids and steroids.

33. Which one is an inclusion body?

A) Mitochondria
B) Golgi body
C) Glycogen granules
D) Nucleolus
✅ Answer: C) Glycogen granules
Explanation: Inclusion bodies are non-living structures like glycogen, fat droplets, or pigments in the cytoplasm.

34. The outer membrane of mitochondria is:

A) Highly folded
B) Permeable to proteins
C) Permeable to small solutes and ions
D) Contains ATP synthase
✅ Answer: C) Permeable to small solutes and ions
Explanation: The outer membrane is relatively permeable to ions and small molecules.

35. Which structure is common to both prokaryotic and eukaryotic cells?

A) Nucleus
B) Mitochondria
C) Ribosomes
D) ER
✅ Answer: C) Ribosomes
Explanation: Both types of cells possess ribosomes (though of different types—70S in prokaryotes, 80S in eukaryotes).

36. Tonoplast is the membrane of:

A) Nucleus
B) Vacuole
C) Mitochondria
D) Lysosome
✅ Answer: B) Vacuole
Explanation: The membrane surrounding the central vacuole in plant cells is called the tonoplast.

37. Function of centrosome is to:

A) Help in protein synthesis
B) Form spindle fibers during cell division
C) Transport material
D) Secrete enzymes
✅ Answer: B) Form spindle fibers during cell division
Explanation: Centrosomes organize microtubules and form spindle fibers during mitosis.

38. Which is not a function of the smooth endoplasmic reticulum?

A) Lipid synthesis
B) Steroid hormone production
C) Detoxification
D) Protein synthesis
✅ Answer: D) Protein synthesis
Explanation: Protein synthesis is carried out by rough ER due to presence of ribosomes.

39. The structural and functional unit of life is:

A) Tissue
B) Organ
C) Cell
D) Organ system
✅ Answer: C) Cell
Explanation: The cell is the basic unit of structure and function in all living organisms.

40. The longest cell in the human body is:

A) Muscle cell
B) Neuron
C) RBC
D) WBC
✅ Answer: B) Neuron
Explanation: Neurons can be over a meter long, especially those extending from spinal cord to limbs.

41. Organelles responsible for protein synthesis are:

A) Mitochondria
B) Ribosomes
C) Golgi complex
D) Lysosomes
✅ Answer: B) Ribosomes
Explanation: Ribosomes synthesize proteins using mRNA as a template.

42. Fluid-filled sac surrounded by tonoplast is called:

A) Lysosome
B) Plastid
C) Vacuole
D) Nucleus
✅ Answer: C) Vacuole
Explanation: Plant vacuoles maintain turgor pressure and store substances.

43. The smallest cell is that of:

A) Mycoplasma
B) Bacteria
C) RBC
D) Virus
✅ Answer: A) Mycoplasma
Explanation: Mycoplasma is the smallest living cell, about 0.1 µm in size.

44. Cell organelle responsible for ATP production is:

A) Nucleus
B) Golgi body
C) Mitochondria
D) Ribosome
✅ Answer: C) Mitochondria
Explanation: Mitochondria carry out oxidative phosphorylation, producing ATP.

45. Membrane-bound cell organelles are absent in:

A) Blue-green algae
B) Yeast
C) Amoeba
D) Chlamydomonas
✅ Answer: A) Blue-green algae
Explanation: Blue-green algae (cyanobacteria) are prokaryotic and lack membrane-bound organelles.

46. Which structure provides shape to the cell?

A) Nucleus
B) Cytoplasm
C) Cell membrane
D) Cytoskeleton
✅ Answer: D) Cytoskeleton
Explanation: The cytoskeleton provides mechanical support and maintains cell shape.

47. Which organelle is involved in autophagy?

A) Peroxisome
B) Golgi
C) Lysosome
D) Ribosome
✅ Answer: C) Lysosome
Explanation: Lysosomes digest damaged or non-functional organelles in the process called autophagy.

48. Which part of chloroplast contains enzymes for dark reaction?

A) Grana
B) Thylakoids
C) Stroma
D) Lamellae
✅ Answer: C) Stroma
Explanation: The Calvin cycle (dark reaction) occurs in the stroma of chloroplasts.

49. Which of the following is not a component of endomembrane system?

A) Golgi complex
B) ER
C) Mitochondria
D) Lysosome
✅ Answer: C) Mitochondria
Explanation: Mitochondria and chloroplasts are not part of the endomembrane system.

50. Which of the following is the main site of synthesis of membrane proteins?

A) SER
B) Golgi body
C) Ribosomes on RER
D) Free ribosomes
✅ Answer: C) Ribosomes on RER
Explanation: Membrane-bound ribosomes on rough ER synthesize proteins destined for membranes or secretion.

That wraps up the 50 Most Important NEET PYQs from Chapter 8: Cell - The Unit of Life ✅
Stay tuned for the next chapter, and don’t forget to follow for daily updates and full NEET bio prep content:

🔗 neetpyqall.blogspot.com
🔗 biologyatease1.blogspot.com


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