Cell: The Unit of Life Chapter-Wise Test 5

Correct answer Carries: 4.

Wrong Answer Carries: -1.

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 mitochondria?

Mitochondria generate energy in the form of ATP.
Mitochondria have their own circular DNA.
Mitochondria are found only in prokaryotic cells.
Mitochondria have a double membrane structure.
3

Mitochondria are found in eukaryotic cells, not in prokaryotic cells.

Which of the following statements about the cell wall is correct?

The cell wall is found in animal cells.
The cell wall is primarily composed of cellulose in plant cells.
The cell wall produces ATP.
The cell wall is composed of phospholipids.
2

The cell wall in plant cells is primarily made of cellulose, providing structure and protection.

What is the main function of the endoplasmic reticulum (ER)?

Protein synthesis and lipid synthesis
Photosynthesis
ATP production
Storage of genetic information
1

The rough ER is involved in protein synthesis, while the smooth ER is responsible for lipid synthesis.

What is the role of cell inclusions in eukaryotic cells?

Protein synthesis
Storage of non-living substances
DNA replication
ATP production
2

Cell inclusions are non-living substances like glycogen, lipids, or pigments stored in eukaryotic cells (NCERT, Chapter 8, page 129). Protein synthesis occurs in ribosomes, DNA replication in the nucleus, and ATP production in mitochondria.

Which structure in the cell provides mechanical support and maintains the cell’s shape?

Golgi apparatus
Cytoskeleton
Mitochondrion
Lysosome
2

The cytoskeleton, composed of microtubules, microfilaments, and intermediate filaments, provides mechanical support and maintains the cell’s shape.

Which type of vacuole is found in freshwater protists like Amoeba?

Food vacuole
Contractile vacuole
Central vacuole
Storage vacuole
2

Contractile vacuoles in freshwater protists like Amoeba regulate water balance by expelling excess water (NCERT, Chapter 8, page 135). Food vacuoles store digested material, central vacuoles are plant-specific, and storage vacuoles hold nutrients in plants.

Which component of the plasma membrane facilitates active transport?

Phospholipids
Carrier proteins
Cholesterol
Glycoproteins
2

Carrier proteins facilitate active transport by moving molecules against their concentration gradient using energy (NCERT, Chapter 8, page 128). Phospholipids form the bilayer, cholesterol maintains fluidity, and glycoproteins aid in cell recognition.

Which scientist discovered the Golgi apparatus?

Robert Brown
Camillo Golgi
Anton Von Leeuwenhoek
Matthias Schleiden
2

Camillo Golgi discovered the Golgi apparatus in 1898, which is involved in the modification, packaging, and transport of cellular materials.

Which of the following statements about the nucleus is correct?

The nucleus is absent in all eukaryotic cells.
The nucleus contains chromatin composed of DNA and proteins.
The nucleus produces ATP for the cell.
The nucleus is the site of lipid synthesis.
2

The nucleus contains chromatin, which is a complex of DNA and proteins responsible for genetic information storage.

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