SSC CGL Science – Cell & Tissues – Level 1 · Warm-up · Tier I Level

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SSC CGL Science – Cell & Tissues – Level 1 · Warm-up · Tier I Level – 12 questions, subject: General Science. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
Who discovered the nucleus of the cell in 1831?

Correct Answer: D [Robert Brown]

Explanation:

Robert Brown, 1831. Hooke named the cell (1665); Virchow – cells from cells (1855).

2.  
Which cell organelle is known as the 'suicide bag' of the cell?

Correct Answer: C [Lysosome]

Explanation:

Lysosomes hold digestive enzymes and can digest their own damaged cell.

3.  
One-line recallThe cell wall of a plant cell is mainly made of:

Correct Answer: B [Cellulose]

Explanation:

Plant walls = cellulose; fungi = chitin; bacteria = peptidoglycan.

4.  
Which organelle is the site of protein synthesis?

Correct Answer: A [Ribosome]

Explanation:

Ribosomes make proteins, free in the cytoplasm or on rough ER.

5.  
A human sperm or egg cell (gamete) contains how many chromosomes?

Correct Answer: C [23]

Explanation:

Gametes are haploid: n = 23; body cells have 2n = 46.

6.  
Fill in the blankThe movement of water through a selectively permeable membrane is called ______.

Correct Answer: A [Osmosis]

Explanation:

Osmosis is water movement across a selectively permeable membrane.

7.  
Which plant tissue carries water and minerals from the roots to the leaves?

Correct Answer: B [Xylem]

Explanation:

Xylem conducts water and minerals upward; phloem carries food.

8.  
Which of the following is a prokaryote?

Correct Answer: D [Bacterium]

Explanation:

Bacteria lack a nuclear membrane; Amoeba, yeast and Spirogyra are eukaryotes.

9.  
Who stated that all cells arise from pre-existing cells (omnis cellula e cellula)?

Correct Answer: A [Rudolf Virchow]

Explanation:

Virchow (1855) completed the cell theory.

10.  
The increase in girth (thickness) of a stem is due to:

Correct Answer: D [Lateral meristem (cambium)]

Explanation:

Lateral meristem = girth; apical = length.

11.  
Cardiac muscle cells are:

Correct Answer: B [cylindrical, branched and uninucleate]

Explanation:

Branched + one nucleus = cardiac; long unbranched multinucleate = skeletal; spindle = smooth.

12.  
True/False drillhow many of these statements are TRUE?
I. Mitochondria have their own DNA.
II. Ribosomes are bounded by a single membrane.
III. The Golgi apparatus was first described by Camillo Golgi.

Correct Answer: C [Two]

Explanation:

I true, II false (ribosomes have no membrane), III true → two.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 General Science book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-general-science

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