Class 11 · Cell: The Unit of Life

Lysosomes and Hydrolytic Enzymes — NEET Biology

✅ Asked in NEET 2022
📖 NCERT Source

These are membrane bound vesicular structures formed by the process of packaging in the golgi apparatus. The isolated lysosomal vesicles have been found to be very rich in almost all types of hydrolytic enzymes (hydrolases – lipases, proteases, carbohydrases) optimally active at the acidic pH. These enzymes are capable of digesting carbohydrates, proteins, lipids and nucleic acids.

NCERT Biology · Class 11 · Chapter 8 · Paragraph 51
How NTA Uses This Concept

Lysosomes are membrane-bound organelles containing hydrolytic enzymes (proteases, lipases, carbohydrases) that work best at acidic pH. NTA frequently tests whether students know these enzymes are optimally active in acidic conditions, not neutral or basic pH. Many students confuse lysosomal pH with cytoplasmic pH or forget that enzyme activity depends on pH. Remember: lysosomes maintain an acidic internal environment (pH 4.5-5), which is essential for enzyme function and cellular digestion. If NTA asks about optimal pH for lysosomal enzymes or why lysosomes don't digest themselves, the answer always involves acidic pH.

Solve This NEET Question

This paragraph was tested 4 times in NEET.

Q1 of 4NEET 2022

If the pH in lysosomes is increased to alkaline, what will be the outcome? NEET 2022 Phase 2

Q2 of 4NEET 2019

Which of the following statements about lysosomes is not correct? NEET 2019

Q3 of 4NEET 2016

Which one of the following cell organelles is enclosed by a single membrane? (NEET 2016 Phase 1)

Q4 of 4NEET 2016

A cell organelle containing hydrolytic enzymes is: (NEET 2016 Phase 2)

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