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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: - The c₄ plants are photosynthetically more effficient than C₃ plants because:
- What is the role of NAD in cellular respiration
- A somatic cell that has just completed the Sphase of its cell cycle, as compared
- The first action spectrum of photosynthesis which was described by Engelmann
- Which among the following has highest water potential
Topics: Cell Structure and Functions
(413)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The c₄ plants are photosynthetically more effficient than C₃ plants because:
- What is the role of NAD in cellular respiration
- A somatic cell that has just completed the Sphase of its cell cycle, as compared
- The first action spectrum of photosynthesis which was described by Engelmann
- Which among the following has highest water potential
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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