Cell: The Unit of Life Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

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

The smooth ER is involved in protein synthesis.
The rough ER is involved in lipid synthesis.
The rough ER has ribosomes attached to its surface.
The smooth ER produces ribosomes.
3

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

What is the primary role of the nucleoplasm?

Protein synthesis
Transport of molecules
Suspension of chromatin and nucleolus
Lipid storage
3

The nucleoplasm, also called nuclear sap, is a gel-like substance that suspends chromatin and nucleoli and provides a medium for molecular exchange.

Which component of the cytoskeleton is responsible for intracellular transport?

Microfilaments
Intermediate filaments
Microtubules
Centrioles
3

Microtubules form tracks along which organelles and vesicles move within the cell, facilitating intracellular transport.

Which of the following statements about mitochondria is incorrect?

Mitochondria have their own DNA.
Mitochondria are double-membrane-bound organelles.
Mitochondria perform photosynthesis.
Mitochondria generate ATP through aerobic respiration.
3

Mitochondria do not perform photosynthesis; they are responsible for ATP production through aerobic respiration.

Which of the following is correct about vacuoles?

Vacuoles are involved in photosynthesis.
Vacuoles help maintain cell turgor pressure in plant cells.
Vacuoles produce ribosomes.
Vacuoles store genetic information.
2

Vacuoles in plant cells store water and help maintain turgor pressure, which provides structural support.

Which type of vacuole is responsible for osmoregulation in unicellular organisms like Amoeba?

Food vacuole
Contractile vacuole
Central vacuole
Storage vacuole
2

The contractile vacuole helps in osmoregulation by expelling excess water from the cell, maintaining internal balance.

Which of the following is correct about microtubules?

Microtubules are involved in cellular movement and intracellular transport.
Microtubules are composed of actin.
Microtubules store genetic material.
Microtubules are responsible for photosynthesis.
1

Microtubules are part of the cytoskeleton and play a crucial role in cellular movement and transport of organelles.

Which cell organelle is known as the 'suicidal bag' due to its role in autolysis?

Mitochondria
Lysosome
Golgi apparatus
Peroxisome
2

Lysosomes are referred to as 'suicidal bags' because they contain hydrolytic enzymes that can digest the cell during autolysis.

Which of the following statements about chloroplasts is incorrect?

Chloroplasts are present in plant cells.
Chloroplasts contain 70S ribosomes.
Chloroplasts store starch.
Chloroplasts are the site of cellular respiration.
4

Chloroplasts are the site of photosynthesis, not cellular respiration.

Which of the following is correct about centrioles?

Centrioles are present in plant cells.
Centrioles are involved in spindle formation during cell division.
Centrioles store genetic material.
Centrioles perform photosynthesis.
2

Centrioles play a key role in organizing microtubules to form the spindle apparatus during cell division, especially in animal cells.

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