This set of Biochemical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Biological Basics – Carbohydrates”.
1. What is the basic empirical formula of most carbohydrates?
a) (CHON2)n
b) (CH2NO)n
c) (CH2O)n
d) (CHO)n
View Answer
Explanation: The empirical formula for most of the carbohydrates is (CH2O)n. Some sugars also contain sulphur, nitrogen and phosphorus.
2. Which is the most abundant monosaccharide?
a) Glucose
b) Fructose
c) Galactose
d) Dextrose
View Answer
Explanation: The most abundant sugar is six carbon sugar D-glucose. It is simply known as Dextrose.
3. The monosaccharide which contains the carbonyl group on the ends of the chain is called ketose.
a) True
b) False
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Explanation: The monosaccharide which contains the carbonyl group on the ends of the chain is called aldose. The monosaccharide which contains the carbonyl group anywhere other the peripheral end of the chains, it is called ketose.
4. Which monosaccharide contains more than one chiral carbon atoms?
a) Dihydroxyacetone
b) Glyceraldehyde
c) Sorbitol
d) Mannose
View Answer
Explanation: Dihydroxyacetone contains one or more asymmetric carbon atoms. They are optically active in isomeric forms.
5. Identify which of these sugars is not capable of reducing ferric (Fe3+) ions?
a) Glucose
b) Fructose
c) Galactose
d) Sucrose
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Explanation: Glucose and other sugars except sucrose are capable of reducing Fe3+ and Cu2+. Hence they are called reducing sugars.
6. Which of these are the monomer units of Dextran polymer?
a) α-1,4 glucose sub units
b) α-1,4 D-glucose sub units
c) α-1,6 poly-D-glucose sub units
d) α-1,6 D-glucose sub units
View Answer
Explanation: Dextran is made up α-1,6 poly-D-glucose sub units. It is a bacterial and yeast cell polysaccharide which is abundantly found in bacteria growing on teeth.
7. Which part of the body contains Keratan sulphate?
a) Bone
b) Hair
c) Cartilage
d) Bone, Hair and Cartilage
View Answer
Explanation: Keratan sulphate is seen in bone, cartilage, hair, nail, horn, cornea and etc. Function of keratin sulphate is to adhere the cells to each other in order to form a protective layer called epidermis.
8. Cell wall of bacterial and algal cells is made up of homopolysaccharides.
a) True
b) False
View Answer
Explanation: Cell wall of bacterial and algal cells is made up of heteroploysaccarides. Bacterial cell wall is made up of peptidoglycan and algal cell wall is made up of Chitin.
9. Which of these organisms contain lipopolysaccharides in their outer membrane?
a) Escherichia coli
b) Staphylococcus aureus
c) Hay bacillus
d) Bacillus cereus
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Explanation: Lipopolysaccharides are seen in the outer membrane of gram negative bacteria. All other examples are of gram positive bacteria.
10. Glycoproteins contain covalently linked ______
a) Monosaccharides
b) Disaccharides
c) Oligosaccharides
d) Polysaccharides
View Answer
Explanation: Glycoproteins are made up of covalently linked oligosaccharides which are structurally complex and small. Glycoproteins are seen in many cell surfaces.
11. Which protein initiates interaction between cells?
a) Pectin
b) Lectin
c) Chitin
d) Peptidoglycan
View Answer
Explanation: Lectin is a carbohydrate binding protein. It is used to initiate interaction with cells.
12. Which chromatography technique is commonly used to separate oligosaccharides from a mixture of oligosaccharides?
a) Affinity chromatography
b) Ion-exchange chromatography
c) Column chromatography
d) Gas chromatography
View Answer
Explanation: The different chromatographic techniques such as Ion-exchange chromatography, Gel filtration, Lectin affinity chromatography are used to separate oligosaccharides from oligosaccharide mixture.
13. Which glycoprotein acts as a transport molecule?
a) Ceruloplasmin
b) Lectin
c) Mucin
d) Collagen
View Answer
Explanation: Ceruloplasmin is a glycoprotein. It is used as a transport molecule. Another example of transport molecule is Transferrin.
14. Which protein affects in folding of proteins?
a) Lectin
b) Mucin
c) Calnexin
d) Patatin
View Answer
Explanation: Calnexin affects the folding of certain proteins. It is also a glycoprotein molecule. Another example of a protein affecting protein folding is Calreticulin.
15. Identify the isomer of the glucose from the options given below.
a) Dextrose
b) Sucrose
c) Galactose
d) Ribose
View Answer
Explanation: Isomers of glucose are galactose and fructose. Dextrose and ribose are simple sugars. Dextrose can act as a substitute for glucose. Sucrose is a disaccharide.
Sanfoundry Global Education & Learning Series – Biochemical Engineering
To practice all areas of Biochemical Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.
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