Question

The maximum number of enzymes are found in
A. Lysosomes
B. Endoplasmic reticulum
C. Nucleus
D. Mitochondria

Answer 1

Hint: The maximum no. of enzymes are found in the organelle in which maximum processes like respiration, photosynthesis and energy production occur which generally occurs in chloroplast, mitochondria and nucleus.

Complete answer:
As we know, enzymes are produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction. Also they increase the rate of reaction. So, maximum enzymes are found in the organelle, in which maximum no. of biochemical reactions occur.

> Option A is lysosome. Lysosomes contain about 50 different degradative enzymes that can hydrolyze proteins, DNA, RNA, polysaccharides, and lipids.

> Option B is Endoplasmic reticulum. Some digestive enzymes are found in endoplasmic reticulum.

Option C is nucleus. Mainly nine enzymes are found in nucleus: hexokinase, P-fructokinase, glucose-6-P dehydrogenase, 6-P-gluconate dehydrogenase, TPN-linked isocitrate dehydrogenase, malic dehydrogenase, lactic dehydrogenase, glutamic dehydrogenase, and ATP.

> Option D is mitochondria. Mitochondria produce makes for processes like electron transport chain, krebs cycle are involved and operated by the different enzymes. Thus, the maximum number of enzymes are found in mitochondria.

Hence, The correct answer is option (D).

Additional information:
Mitochondria is called the powerhouse of the cell because it generates energy and stores it in the form of ATP( adenosine triphosphate). Mitochondria contain their own chromosomes and we inherit mitochondrial chromosomes only from the mother.

Note: Mitochondria contain several enzymes for respiration and other processes, which include monoamine oxidase, rotenone-insensitive NADH-cytochrome c-reductase, kynurenine hydroxylase and fatty acid Co-A ligase.