Biology Test

Biology today Quiz. Date 29/12/2018

1. Palindromic DNA was discovered by

A. J. D. Watson
B. Khorana
C. Sanger
D. Wilson and Thomas

2. PROKARYOTES genetic system

A. DNA but no histones
B. Histones
C. DNA with histones
D. None of the above

3. Histone is rich in

A. Alanine
B. Methionine
C. Histidine
D. Arginine

4. Which of the gene is transcribed but not translated?

A. Histone gene
B. Keratin gene
C. t-RNA gene
D. r-RNA gene

5. mRNA is complementary to

A. Structural gene in the sense strand
B. Structural gene in the non-sense strand
C. Operator gene in the sense strand
D. Regulatory sequence of the sense strand

6. Cap in eukaryotic mRNA consists of

A. Methylated guanine residue
B. Methylated thymine residue
C. Methylated cytosine residue
D. Non- methylated adenine residues

7. Cap in the eukaryotic mRNA occurs in

A. 5'-end
B. 3'-end
C. Both A and B
D. Middle

8. tRNA reacts only with

A. Activated amino acids
B. Unactivated adenine
C. Ribosomes
D. ATP

9. Anti-codon is present on

A. rRNA
B. Ribosomal protein part
C. tRNA
D. mRNA

10. Defective gene in Amylotropic lateral sclerosis is

A. Rb
B. P53
C. bC12
D. TGF

11. Genetic disorder Xeroderma pigmentosum is due to error in

A. Base excision repair mechanism
B. Nucleotide excision repair mechanism
C. Direct repair mechanism
D. DNA replication mechanism
Answer-
1 - D
2 - A
3 - D
4 - C
5 - A
6 - A
7 - A
8 - A
9 - C
10 - C
11 - B