Archives: Questions and Answers

Expressed Sequence Tag is defined as (A) a partial sequence of a codon randomly selected from cDNA library (B) the characteristic gene expressed in the cell (C) the protein coding DNA sequence of a gene (D) uncharacterized fragment of DNA present in the cell

Accession number is a unique identification assigned to a (A) single database entry for DNA/Protein (B) single database entry for DNA only (C) single database entry for Protein only (D) multiple database entry for DNA/Protein

Somatic cell gene transfer is used for P. transgenic animal production Q. transgenic diploid cell production R. classical breeding of farm animals S. in-vitro fertilization (A) P, R and S (B) P, Q and R (C) P and R (D) P only

Lymphocytes interact with foreign antigens in (A) Bone marrow (B) Peripheral blood (C) Thymus (D) Lymph nodes

A neonatally thymectomized mouse, immunized with protein antigen shows (A) both primary and secondary responses to the antigen (B) only primary response to the antigen (C) delayed type hypersensitive reactions (D) no response to the antigen

A culture of bacteria is infected with bacteriophage at a multiplicity of 0.3. The probability of a single cell infected with 3 phages is (A) 0.009 (B) 0.027 (C) 0.9 (D) 0.27

Interferon-β is produced by (A) bacteria infected cells (B) virus infected cells (C) both virus and bacteria infected cells (D) fungi infected cells

Which one of the following DOES NOT belong to the domain of Bacteria? (A) Cyanobacteria (B) Proteobacteria (C) Bacteroids (D) Methanobacterium

An example for template-independent DNA polymerase is (A) DNA Polymerase I (B) RNA polymerase (C) Terminal deoxynucleotidyl transferase (D) DNA polymerase III

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