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Which one of the following is a single membrane structure?
Options
(a) lysosomes
(b) chloroplast
(c) mitochondria
(d) nucleus
Correct Answer:
lysosomes
Explanation:
A lysosome is a tiny sac bounded by a single unit membrane of lipoprotein discovered by de Dube (1995). It contains a dense, finely granular fluid. The latter consists of glycoprotein hydrolytic (digestive) enzymes called acid hydrolases. These include proteases, lipases, nucleases, glycosidases, sulphatases, acid phosphatases, etc. However, all the enzymes do not occur in the same lysosomes. The lysosome enzymes do not occur in the same lysosome. There are different sets of enzymes in different lysosomes. The lysosome enzymes can break down all major biological macromolecules present in the cells or entering the cells from outside into their building block subunits by addition of water. So these are digestive in nature. The lysosome enzymes are active in acid medium, at about pH 5, hence their name. It is also called suicidal bag.
Related Questions: - Which of the following enhances or induces fusion of protoplasts ?
- Male and female gametophytes do not have free living independent existence for
- The end product of fermentation are
- The essential chemical component of many coenzymes are:
- R.Q (Respiratory quotient ) is infinite in
Topics: Cell Structure and Functions
(413)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following enhances or induces fusion of protoplasts ?
- Male and female gametophytes do not have free living independent existence for
- The end product of fermentation are
- The essential chemical component of many coenzymes are:
- R.Q (Respiratory quotient ) is infinite in
Topics: Cell Structure and Functions (413)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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