This set of Biochemical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Biological Basics – Lipids, Fats and Steroids”.
1. How can storage lipids be extracted easily?
a) Using non-polar solvents
b) Using polar solvents
c) Using chemical reagents
d) Using water
View Answer
Explanation: Lipids are water insoluble compounds. They can be easily extracted by using non-polar solvents like diethyl ether, chloroform.
2. What is the primary function of triglycerides?
a) Structural integrity
b) Digestion and absorption
c) Store fats
d) Hormone production
View Answer
Explanation: Triglycerides are formed by esterification of three fatty acid molecules on one glycerol molecule. Their primary function is to store fats for purpose like insulation and absorption etc.
3. At what pH do the polar heads of glycerophospholipds carry electric charge?
a) 6
b) 7
c) 8
d) 9
View Answer
Explanation: The phosphate group attaches to the glycerol molecule by phosphodiester bond. This produces a negative charge on the head group at pH 7.
4. Which of these is a main lipid component for plant and animal membrane?
a) Phosphatidylcholine
b) Phosphatidylserine
c) Phosphatidylethanolamine
d) Phosphatidylglycerol
View Answer
Explanation: Phosphatidylcholine is the main lipid component in plant and animal membranes. It is also called Lectin.
5. Where are sphingolipids seen?
a) Blood capillary
b) Bone
c) Muscles
d) Nerve fiber
View Answer
Explanation: Sphingolipids are present in the myelin sheath of nerve fiber. Some important sphingolipids are:- Ceramides, Sphingomyelin and etc.
6. Which precursor produces sterols and steroids biologically in animals?
a) Saponins
b) Flavinoids
c) Terpenoids
d) Alkaloids
View Answer
Explanation: Terpenoid precursors biologically produce steroids and sterols in animals. They are a part of traditional herbal remedies.
7. Lipoproteins are water-soluble.
a) True
b) False
View Answer
Explanation: The outer shell of lipoprotein is composed of phospholipids which makes it water soluble. Enzymes, Antigens, Toxins are examples of lipoproteins.
8. Chylomicron carries triglycerides from ___________
a) Intestine to liver
b) Liver to adipose tissue
c) Liver to Intestine
d) Intestine to adipose tissue
View Answer
Explanation: Chylomicron is a lipoprotein with lowest density. It carries triglycerides from the intestine to the adipose tissue.
9. What is the function of HDL?
a) Carry cholesterol from liver to cells
b) Carry cholesterol from tissues to liver
c) Carry cholesterol from tissues to kidney
d) Carry cholesterol from heart to kidney
View Answer
Explanation: HDL is High-density lipoprotein. Its function is to carry cholesterol back from tissue to liver.
10. Which vitamin is a fat soluble compound made up of isoprene unit?
a) D
b) B1
c) B2
d) C
View Answer
Explanation: Vitamin A,D,E and K are fat soluble. These vitamins are made up of isoprene units.
11. Which chromatographic technique is used to separate extracted lipid molecules?
a) HPLC
b) Column chromatography
c) Ion-exchange chromatography
d) Paper chromatography
View Answer
Explanation: HPLC is High-performance liquid chromatography. It is used to separate lipid molecules extracted from tissues using solvents.
Sanfoundry Global Education & Learning Series – Biochemical Engineering
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