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NUCLEIC ACIDS- Part 19
See all quizzes of NUCLEIC ACIDS- Part 19 here:
1 Genes are
(A) RNA (B) DNA
(C) lipoproteins and (D) Chromoproteins
2. Codons are in
(A) DNA (B) mRNA
(C) tRNA (D) rRNA
3. The genetic code operates via
(A) The protein moiety of DNA
(B) The base sequences of DNA
(C) The nucleotide sequence of mRNA
(D) The base sequence of tRNA
4. Urine bases with methyl substituents
occurring in plants are
(A) Caffeine (B) Theophylline
(C) Theobromine (D) All of these
5. Genetic information in human beings is
stored in
(A) DNA (B) RNA
(C) Both (A) and (B) (D) None of these
6. All following are naturally occurring
nucleotides except
(A) Cyclic AMP
(B) ATP
(C) DNA
(D) Inosine monophosphate
7. If the amino group and a carboxylic
group of the amino acid are attached to
same carbon atom, the amino acid is
called as
(A) Alpha (B) Beta
(C) Gamma (D) Epsilon
8. If in a nucleic acid there are more than
8000 nucleotides it is most likely
(A) RNA (B) DNA
(C) Both (A) and (B) (D) None of these
9. Genetic information in human beings is
stored in
(A) RNA (B) DNA
(C) Both (A) and (B) (D) mRNA
10. In RNA, apart from ribose and phosphate,
all following are present except
(A) Adenine (B) Guanine
(C) Thymine (D) Cytosine
11. Which of the following gives a positive
Ninhydrin test?
(A) Reducing sugar (B) Triglycerides
(C) α-amino acids (D) Phospholipids
12. A Gene is
(A) A single protein molecule
(B) A group of chromosomes
(C) An instruction for making a protein molecule
(D) A bit of DNA molecule
13. In DNA, genetic information is located in
(A) Purine bases
(B) Pyrimidine bases
(C) Purine and pyrimidine bases
(D) sugar
14. Which one of the following is not a
constituent of RNA?
(A) Deoxyribose (B) Uracil
(C) Adenine (D) Thymine
15. Which of the following are nucleo proteins?
(A) Protamines
(B) Histones
(C) Deoxy and Ribo nucleo proteins
(D) All of these
16. The total RNA in cell tRNA constitutes
(A) 1–10% (B) 10–20%
(C) 30–50% (D) 50–80%
17. Unit of genetic information:
(A) DNA (B) RNA
(C) Cistron (D) None of these
18. Anticodon sequence are seen in
(A) tRNA and transcribed DNA strand
(B) tRNA and complementary DNA strand
(C) mRNA
(D) mRNA and complementary DNA strand
19. cAMD is destroyed by
(A) Adenylate cyclase
(B) Phosphodiesterase
(C) Synthetase phosphatase
(D) Synthetase kinase
20. Restriction enzymes have been found in
(A) Humans (B) Birds
(C) Bacteria (D) Bacteriophase
21. Sulphur is not present in
(A) Thiamine (B) Lipic acid
(C) Thymine (D) Biotin
22. Which one of the following binds to
specific nucleotide sequences?
(A) RNA polymerase (B) Repressor
(C) Inducer (D) Restriction
23. Using written convertion which one of the
following sequences is complimentary to
TGGCAGCCT?
(A) ACC GTC GGA (B) ACC GUC GGA
(C) AGG CTG CCA (D) TGG CTC GGA
24. Ribosomes similar to those of bacterial
found in
NUCLEIC ACIDS 271
(A) Plant nucei
(B) Cardiac muscle cytoplasm
(C) Liver endoplasmic reticulum
(D) Neuronal cytoplasm
25 The mechanism of synthesis of DNA and
RNA are similar in all the following ways
except
(A) They involve release of pyrophosphate from
each nucleotide added
(B) They require activated nucleotide precursor
and Mg2+
(C) The direction of synthesis is 5’ → 3’
(D) They require a primer
26. Template-directed DNA synthesis occurs in
all the following except
(A) The replication fork
(B) Polymerase chain reaction
(C) Growth of RNA tumor viruses
(D) Expression of oneogenes
27. Which one of the following statements
correctly describes eukaryotic DNA?
(A) They involve release of pyrophosphate from
each nucleotide precussor and Mg2+
(B) The direction of synthesis is
(C) They require a primer 5’ → 3’
(D) None of these
28. Which one of the following causes frame
shift mutation?
(A) Transition
(B) Transversion
(C) Deletion
(D) Substitution of purine to pyrimidine
29. Catabolism of thymidylate gives
(A) α-alanine
(B) β-alanine
(C) α-aminoisobutyrate
(D) β-aminoisobutyrate
30. Glycine gives __________ atoms of purine.
(A) C2, C3 (B) C4, C5 and N7
(C) C4, C5 and N9 (D) C4, C6 and N7
