Ask Doubt
Which one of the following DOES NOT belong to the domain of Bacteria?
(A) Cyanobacteria
(B) Proteobacteria
(C) Bacteroids
(D) Methanobacterium
1 Answer An example for template-independent DNA polymerase is
(A) DNA Polymerase I
(B) RNA polymerase
(C) Terminal deoxynucleotidyl transferase
(D) DNA polymerase III
1 Answer Q.9 Under stress conditions bacteria accumulate
(A) ppGpp (Guanosine tetraphosphate)
(B) pppGpp (Guanosine pentaphosphate)
(C) both ppGpp and pppGpp
(D) either ppGpp or pppGpp
1 Answer Q.8 During transcription
(A) DNA Gyrase introduces negative supercoils and DNA Topoisomerase I removes negative supercoils
(B) DNA Topoisomerase I introduces negative supercoils and DNA Gyrase removes negative supercoils
(C) both DNA Gyrase and DNA Topoisomerase I introduce negative supercoils
(D) both DNA Gyrase and DNA Topoisomerase I remove negative supercoils
1 Answer Q.7 In transgenics, alterations in the sequence of nucleotide in genes are due to
P. Substitution
Q. Deletion
R. Insertion
S. Rearrangement
(A) P and Q
(B) P, Q and R
(C) Q and R
(D) R and S
1 Answer Q.6 Peptidyl transferase activity resides in
(A) 16S rRNA
(B) 23S rRNA
(C) 5S rRNA
(D) 28S rRNA
1 Answer Q.5 Program used for essentially local similarity search is
(A) BLAST
(B) RasMol
(C) ExPASY
(D) SWISS-PROT
1 Answer Q.4 Antibiotic resistance marker that CANNOT be used in a cloning vector in Gram negative bacteria is
(A) Streptomycin
(B) Ampicillin
(C) Vancomycin
(D) Kanamycin
1 Answer Q.3 The bacteria known to be naturally competent for transformation of DNA is
(A) Escherichia coli
(B) Bacillus subtilis
(C) Mycobacterium tuberculosis
(D) Yersinia pestis
1 Answer Q.2 Ames test is used to determine
(A) the mutagenicity of a chemical
(B) carcinogenicity of a chemical
(C) both mutagenicity and carcinogenicity of a chemical
(D) toxicity of a chemical
1 Answer
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan
Sourav Pan