Skip to content
- The term molecular biology was first time used by __?
a. Watson & Crick
b. Maurice Wilkins
c. William Astbury
d. Fredrick Miescher - Wobble hypothesis is proposed by _?
a. J. Lederberg
b. Francis Crick
c. F. Jacob
d. F. Sanger - Who discovered the PCR?
a. Stanford
b. Karry Mullis
c. Franklin Stahl
d. Alec Jeffreys - The transfer of genetic material and restoration of the ability to form capsule in bacteria is called as?
a. Griffith effect
b. Bacterial transformation
c. Both
d. None - Which one have double stranded DNA?
a. Wound tumor
b. Reovirus
c. Both
d. None - Which one is not a similarity between Z-DNA and B-DNA?
a. Both are double helix
b. The both strands of helix are antiparallel
c. Both are right-handed helixes
d. All are true - Phosphate backbone of the _ is zigzag course?
a. B-DNA
b. Z-DNA
c. Both
d. None - DNA polymerase is helper DNA polymerase?
a. DNA polymerase I
b. DNA polymerase II
c. DNA polymerase III
d. ALL - DNA polymerase synthesize new strand from?
a. 5 – 3 Direction
b. 3 – 5 Direction
c. Both have equal chances
d. Depends on the species - How many replicons are present in the DNA of E. Coli?
a. 1
b. 2
c. 3
d. 4 - Prevents supercoils?
a. DNA helicase
b. DNA gyrase
c. DNA Topoisomerase
d. Both b & c - RNA primer is excised by the __?
a. DNA polymerase I
b. DNA polymerase II
c. DNA gyrase
d. DNA Topoisomerase - Which one is non-genetic ribonucleic acid?
a. RNA
b. DNA
c. Both
d. None - Which one is present in the nucleolus?
a. RNA Polymerase I
b. RNA Polymerase II
c. RNA Polymerase III
d. All - Goldberg-Hogness Box
a. TTGACA
b. TATA
c. CAAT
d. TTCCCG - Which one have no influence on the regulation of a gene?
a. Promoters
b. Enhancers
c. Silencers
d. All have influence - Which one is insoluble and more stable RNA?
a. mRNA
b. rRNA
c. tRNA
d. All are soluble and stable - Which one is not a post transcriptional modification of mRNA?
a. Addition of &-MeG on 5Prime b. Addition of poly A tail on 3
Prime
c. RNA splicing
d. All are posttranscriptional modification - How many introns are in alpha-globin gene?
a. 1
b. 2
c. 3
d. 4 - Average life of E. Coli mRNA is?
a. 2 min
b. 2 hours
c. Several hours
d. Several days
error: Content is protected !!