NEET (UG)

Practice Test 1 — Cell: The Unit of Life

12 questions • 18 minutes • auto-graded with full solutions

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Section A — MCQ (Single Correct)

Question 1

The cell theory was given by:

Solution: Schleiden (plants) and Schwann (animals) gave the cell theory.

Question 2

A naked circular DNA without a nuclear membrane occurs in the:

Solution: Prokaryotic DNA lies in the nucleoid.

Question 3

Peptidoglycan is the building material of the:

Solution: Bacterial walls are peptidoglycan (murein).

Question 4

Which organelle is the site of aerobic respiration?

Solution: Mitochondria carry out aerobic respiration (ATP).

Question 5

Mitochondria and chloroplasts contain ribosomes of the type:

Solution: Both contain 70S ribosomes (semi-autonomous).

Question 6

The Golgi apparatus is mainly concerned with:

Solution: The Golgi modifies, packages and secretes materials.

Question 7

The colourless plastid that stores starch is the:

Solution: Amyloplasts (a leucoplast type) store starch.

Question 8

Ribosomal RNA is synthesised in the:

Solution: The nucleolus synthesises rRNA.

Section B — Assertion & Reason

Question 9

A: Mitochondria are called semi-autonomous organelles.
R: They possess their own DNA and 70S ribosomes.

Solution: Having their own DNA and ribosomes is exactly why they are semi-autonomous — R explains A.

Question 10

A: The plasma membrane allows lateral movement of its lipids and proteins.
R: The fluid-mosaic model describes the membrane as a fluid bilayer with embedded proteins.

Solution: The fluidity of the bilayer is what permits lateral movement — R explains A.

Question 11

A: Active transport can move a solute against its concentration gradient.
R: It does so without using any cellular energy.

Solution: A is true, but R is false — active transport REQUIRES ATP; it is not energy-free.

Question 12

A: Prokaryotic cells have no membrane-bound organelles.
R: Functions like respiration are aided by infoldings of the plasma membrane called mesosomes.

Solution: Both are true, but R describes a workaround for the lack of organelles rather than explaining why they are absent — so R does not explain A.