Cell: The Unit of Life' For NEET
Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the primary composition of the cell wall in plant cells?

Chitin
Cellulose
Lignin
Glycoprotein
2

The plant cell wall is primarily composed of cellulose, providing structural support and protection.

Which structure in a prokaryotic cell is involved in respiration and increases the surface area for enzymatic activity?

Ribosome
Mesosome
Plasmid
Capsule
2

Mesosomes are infoldings of the plasma membrane in prokaryotic cells that assist in respiration and increase surface area for enzymatic activities.

Which cell organelle is called the 'powerhouse of the cell'?

Chloroplast
Mitochondrion
Golgi apparatus
Lysosome
2

Mitochondria are called the powerhouse of the cell because they generate ATP through aerobic respiration.

Who discovered the nucleus of the cell?

Robert Hooke
Matthias Schleiden
Robert Brown
Rudolf Virchow
3

Robert Brown discovered the nucleus in plant cells in 1831.

What is the primary function of the middle lamella in plant cells?

Photosynthesis
Protein synthesis
Cell adhesion
ATP production
3

The middle lamella, primarily composed of calcium pectate, acts as a cementing layer between the walls of adjacent plant cells, aiding in adhesion.

Which of the following is incorrect about prokaryotic cells?

Prokaryotic cells lack a true nucleus.
Prokaryotic cells have circular DNA.
Prokaryotic cells have 80S ribosomes.
Prokaryotic cells lack membrane-bound organelles.
3

Prokaryotic cells have 70S ribosomes, not 80S ribosomes.

What is the role of the glycocalyx in prokaryotic cells?

Protein synthesis
Protection and adhesion
DNA replication
ATP production
2

The glycocalyx in prokaryotic cells is a polysaccharide or protein layer (capsule or slime layer) that aids in protection and adhesion to surfaces (NCERT, Chapter 8, page 130). It does not synthesize proteins (ribosomes do), replicate DNA (nucleoid enzymes do), or produce ATP (mesosomes aid respiration).

Which of the following statements about the endoplasmic reticulum (ER) is correct?

The rough ER synthesizes lipids.
The smooth ER is involved in protein synthesis.
The rough ER is studded with ribosomes for protein synthesis.
The smooth ER stores genetic material.
3

The rough endoplasmic reticulum (RER) has ribosomes on its surface, making it a site for protein synthesis.

Which component of the cytoskeleton is responsible for cell motility?

Microtubules
Microfilaments
Intermediate filaments
Centrioles
2

Microfilaments, made of actin, are responsible for cell motility, such as amoeboid movement and cytoplasmic streaming (NCERT, Chapter 8, page 138). Microtubules form spindle fibers and cilia, intermediate filaments provide structural support, and centrioles organize microtubules.

Which of the following statements about prokaryotic cells is correct?

Prokaryotic cells have a well-defined nucleus.
Prokaryotic cells have 80S ribosomes.
Prokaryotic cells lack membrane-bound organelles.
Prokaryotic cells contain mitochondria.
3

Prokaryotic cells lack membrane-bound organelles, including mitochondria and a well-defined nucleus.

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