This set of Biochemistry Multiple Choice Questions & Answers (MCQs) focuses on “Structural Lipids in Membranes”.
1. Out of the following, cholesterol does not serve as a precursor for which compounds?
a) Vitamin D
b) Sex hormones
c) Bile salts
d) Bile pigments
View Answer
Explanation: Cholesterol serves as a precursor for the biosynthesis of steroid molecules, bile acids and vitamin D.
2. Which of the following is a sphingophospholipid?
a) Lecithin
b) Sphingomyelin
c) Plasmolegen
d) Cardiolipin
View Answer
Explanation: Lecithin, plasmolegen and cardiolipin are glycerophospholipids.
3. Which of the following glycerophospholid acts as a lipotropic agent?
a) Cardiolipin
b) Phosphatidylserine
c) Phosphatidylinositol
d) Phosphatidylcholine
View Answer
Explanation: Only phosphatidylcholine acts as a lipotropic agent.
4. Which of the following phospholipids is a component of inner mitochondrial membrane?
a) Plasmologen
b) Cephalin
c) Lecithin
d) Cardiolipin
View Answer
Explanation: Cardiolipin is an essential component of inner mitochondrial membrane.
5. In which of the following glycerophospholipids two phosphatidic acids share single glycerol?
a) Cardiolipin
b) Phosphatidylserine
c) Phosphatidylinositol
d) Phosphatidylcholine
View Answer
Explanation: In cardiolipin, two phosphatidic acids share single glycerol.
6. Platelet activating factor stimulates the release of which of the following compounds?
a) Vasopressin
b) Serotonin
c) Adrenaline
d) Cortisol
View Answer
Explanation: Platelet activating factor stimulates the release of serotonin.
7. Which of the following group of membrane lipids predominate in plant cells?
a) Galactolipids
b) Sphingolipids
c) Glycerophospholipids
d) Archaebacterial ether lipids
View Answer
Explanation: Galactolipids are the lipids predominant in the chloroplasts of plants.
8. Which of the following membrane lipids have a direct glycosidic linkage between the head-group sugar and the backbone glycerol?
a) Glycolipids
b) Phospholipids
c) Sphingolipids
d) Ether lipids
View Answer
Explanation: Glycolipids have a direct glycosidic linkage between the head-group sugar and the backbone glycerol.
9. The backbone of phospholipids is __________
a) L-glycerol 1-phosphate
b) L-glycerol 3-phosphate
c) D-glycerol 3-phosphate
d) sn-glycerol 1-phosphate
View Answer
Explanation: L-glycerol 3-phosphate or D-glycerol 1-phosphate or sn-glycerol 3-phosphate is the backbone of phospholipids.
10. What is the head-group alcohol in plasmolegen and platelet-activating factor?
a) Alkene
b) Choline
c) Alkane
d) Acetic acid
View Answer
Explanation: Choline is the head-group alcohol in plasmolegen and platelet-activating factor.
11. Which of the following does not contain glycerol?
a) Glycerophospholipids
b) Galactolipids
c) Sphingolipids
d) Triacylglycerols
View Answer
Explanation: Sphingolipids contain sphingosine instead of glycerol.
Sanfoundry Global Education & Learning Series – Biochemistry.
To practice all areas of Biochemistry, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Apply for Biotechnology Internship
- Practice Biotechnology MCQs
- Check Biochemistry Books
- Check Biotechnology Books
