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MCQs with answers for Molecules of the Cell
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Questions From Competitive Examination1.There are several proteins that help to open up DNA double helix in front of the
replication fork, these belong to the category of.
(CBSE PMT 1993, 1994)
(a) DNA topoisomerase (b) DNA polymerase l
(c) DNA gyrase (d) DNA unwindase or DNA ligase
2. Which of the following is a group of trace elements ?
(Karnatka PMT 1993, CPMT 1994)
(a) Mo, Mn, Zn, Co (b) Mo, Zn, Mn, Mg
(c) Mg, Mn, Co, Zn (d) Mn, Mg, Zn
3. The set of nitrogen bases of DNA is (KCET, 1994 MP PMT 1994)
(a) ATUG (b) UTGC
(c) ATGC (d) AUCC
4. Nitrogen is the main constituent of (CMPT 1994, MP PMT 1994)
(a) Fats (b) Proteins
(c) Polyphosphates (d) Carbohydrates
5. An enzyme will be formed by binding of (AFMC 1994)
(a) Fatty acids (b) Glucose molecules
(c) Aminoacids (d) Carbon atoms
6. Which of the following set comprises four primidine bases? (CBSE MPT 1994)
(a) TGCCTAACG (b) GATCAATGC
(C) UAGCGGUAA (d) GCUAGACAA
,7. One of the following is physiologically active (functional) protein: (BHU1994)
(a) Collagen (b) Vitamin
(c) Ossein (d) Enzyme
8. In polypeptide chains A and B the total amino acids in insulin are 51.In chain A
how many amino acids are there?
(a) 21 (b) 20
(c) 30 (d) 31
9. Trace out the deceasing order of mineral concentration in a cell:
(Haryana PMT 1994)
(a) K, Na, Ca (b) Ca, K, Na
(c) Na, K, Ca (d) K, Ca, Na
10. If there is a double stranded DNA virus particle with 20,000 base
how many nucleotides will be present in it? (MP PMT 1994)
(a) 20,000 (b) 10,000
(c) 5,000 (d) 40,000
11. DNA has in it four different types of nucleotides, these are:
(KCET 1994)
(a) Adenine, thymine, uracil, cytosine
(b) Adenine, uracil, thymine, alanine
(c) Adenine, thymine, guanine, cytosine
(d) None of the above
.
12. A nucleoside differs from nucleotide is not having : (MP PMT1995)
(a) Phosphate (b) Sugar
(c) Nitrogen base (d) Phosphate and sugar
, 13. Ca ions are essential for : (RPMT 1995)
(a) Muscle contraction (b) Clotting of blood
(c) Formation of bone (d) All above
14. Which of the following is connected by three hydrogen bonds?
(RPMT 1995)
(a) Adenine and Guanine
(b) Adenine and Thymine
(c) Bacteria and chloroplast
(d) Cytosine and Guanine
15. Circular DNA molecule occurs in : (MP PMT 1995)
(a) Bacteria only (b) Bacteria and chloroplast
(c) Bacteria, chloroplast, and mitochondria (d) All viruses
16. One of the following is called transamination: (CPMT 1995)
(a) Transfer of amino group from amino acid to keto acid
(b) Oxidation of ammonia
(c) Amino-acid destruction
(d) None of the above
17. Highest quantity of cellulose can be traced in: (RPMT 1995)
(a) Flax (b) Coir
(c) Hemp (d) Cotton
18. One of the following cannot be traced in proteins: (RPMT 1995)
(a) Phosphorous (b) Nitrogen
(c) Glycerol (d) Carbon
19. Which of the following is not a carbohydrate? (RPMT 1995)
(a) Cellulose (b) Chitin
(c) Maltose (d) Pepsin
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