Target Exam

CUET

Subject

Biology

Chapter

Biotechnology -Principles and Processes

Question:

Which of the following pairs is incorrectly matched?

A)Lysozyme  Bacteria 
B)Cellulase Animal cell
C)Restriction endonuclease  Molecular scissors
D)Chitinase  Fungus 
Options:

(A)

(B)

(C)

(D)

Correct Answer:

(B)

Explanation:

The correct answer is Option (2) - (B)

Plant cells - Cellulase: Plant cell walls are made largely of cellulose, and cellulase is an enzyme that breaks down cellulose.

Bacteria - Lysozyme: Correctly matched. Bacterial cell walls contain peptidoglycan, and lysozyme is an enzyme that degrades peptidoglycan, thus breaking down bacterial cell walls.

The cutting of DNA at specific locations became possible with the discovery of the so-called ‘molecular scissors’– restriction enzymes. Restriction enzymes are part of a larger category of enzymes known as nucleases. Exonucleases and endonucleases are the two types. Endonucleases make cuts at specified places within the DNA, whereas exonucleases remove nucleotides off the ends.

Fungi - Chitinase: Correctly matched. Fungi have cell walls composed primarily of chitin, and chitinase is an enzyme that breaks down chitin.