Cell: The Unit of Life Chapter-Wise Test 9

Correct answer Carries: 4.

Wrong Answer Carries: -1.

What is the role of nuclear pores in eukaryotic cells?

Protein synthesis
Regulate exchange between nucleus and cytoplasm
ATP production
Lipid synthesis
2

Nuclear pores in the nuclear envelope regulate the exchange of materials, like RNA and proteins, between the nucleus and cytoplasm (NCERT, Chapter 8, page 136). Protein synthesis occurs in ribosomes, ATP production in mitochondria, and lipid synthesis in the smooth ER.

Which cell organelle contains hydrolytic enzymes and is known as the digestive system of the cell?

Peroxisome
Lysosome
Ribosome
Mitochondrion
2

Lysosomes contain hydrolytic enzymes that digest cellular waste, pathogens, and damaged organelles.

Which of the following statements about the cytoskeleton is correct?

The cytoskeleton is composed only of actin filaments.
The cytoskeleton maintains cell shape and facilitates movement.
The cytoskeleton is found only in prokaryotic cells.
The cytoskeleton stores genetic information.
2

The cytoskeleton provides mechanical support, maintains cell shape, and enables intracellular transport and movement.

Which plastid is responsible for giving fruits and flowers their characteristic colors?

Chloroplast
Leucoplast
Chromoplast
Amyloplast
3

Chromoplasts contain carotenoid pigments that provide yellow, orange, and red colors to fruits and flowers.

Which bacterial shape is described as rod-like?

Coccus
Bacillus
Spirillum
Vibrio
2

The bacillus shape is rod-like and is one of the four basic shapes of bacteria.

Which type of plastid stores oils and fats in plant cells?

Chloroplast
Chromoplast
Amyloplast
Elaioplast
4

Elaioplasts are plastids that store oils and fats in plant cells (NCERT, Chapter 8, page 135). Chloroplasts perform photosynthesis, chromoplasts store pigments, and amyloplasts store starch.

Which of the following is correct about chloroplasts?

Chloroplasts are found in animal cells.
Chloroplasts are involved in cellular respiration.
Chloroplasts contain 70S ribosomes.
Chloroplasts produce proteins for the nucleus.
3

Chloroplasts contain 70S ribosomes and their own circular DNA, similar to mitochondria, supporting the endosymbiotic theory.

What is the primary function of glyoxysomes in plant cells?

Protein synthesis
Fatty acid metabolism
Photosynthesis
ATP production
2

Glyoxysomes are microbodies that convert stored fats into sugars during seed germination (NCERT, Chapter 8, page 135). Protein synthesis occurs in ribosomes, photosynthesis in chloroplasts, and ATP production in mitochondria.

Which structure in prokaryotic cells aids in DNA segregation during cell division?

Mesosome
Nucleoid
Plasmid
Ribosome
2

The nucleoid, the region containing prokaryotic DNA, aids in DNA segregation during binary fission (NCERT, Chapter 8, page 130). Mesosomes assist in respiration, plasmids carry extra genes, and ribosomes synthesize proteins.

Which of the following is incorrect about plasmodesmata?

Plasmodesmata are channels between plant cells.
Plasmodesmata allow the transport of molecules between cells.
Plasmodesmata store water for the plant cell.
Plasmodesmata facilitate cell-to-cell communication.
3

Plasmodesmata are not involved in water storage but are channels for intercellular transport and communication in plant cells.

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