Biotechnology

Match Group I with Group II Group I: P. Staphylococcus aureus Q. Candida albicans R. Mycobacterium tuberculosis S. Lactobacillus lactis Group II: 1. Biofilms 2. Bacteriocins 3. Methicillin resistance 4. Isoniazid (A) P-1, Q-4, R-2, S-3 (B) P-2, Q-3, R-1, S-4 (C) P-3, Q-1, R-4, S-2 (D) P-1, Q-2, R-4, S-3

A mutant Gα protein with increased GTPase activity would (A) not bind to GTP (B) not bind to GDP (C) show increased signaling (D) show decreased signaling

Dizygotic twins are connected to a single placenta during their embryonic development. These twins (A) have identical MHC haplotypes (B) have identical TH cells (C) have identical T cells (D) can accept grafts from each other (both (A) and (B))

Determine the correctness or otherwise of the following Assertion (a) and the Reason (r) Assertion: MTT assay is used to determine cell viability based on the principle of colour formation by DNA fragmentation. Reason: MTT assay is used to determine cell viability based on the colour development by converting tetrazolium soluble salt to insoluble salt. … Read more

Match the following antibiotics in Group I with their mode of action in Group II Group I: P. Chloramphenicol Q. Norfloxacin R. Puromycin S. Rifampicin Group II: 1. Binds to DNA gyrase 2. Binds to RNA Polymerase 3. Inhibits peptidyl transferase 4. Mimics aminoacyl-(tRNA** (A) P-1, Q-3, R-2, S-4 (B) P-3, Q-1, R-2, S-4 (C) … Read more

Match the chemicals in Group I with the possible type/class in Group II Group I: P. Picloram Q. Zeatin R. Thiamine S. Glutamine Group II: 1. Vitamin 2. Auxin 3. Amino Acid 4. Cytokinin (A) P-2, Q-4, R-1, S-3 (B) P-4, Q-1, R-2, S-3 (C) P-3, Q-1, R-2, S-4 (D) P-4, Q-2, R-1, S-3

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

Nuclease-hypersensitive sites in the chromosomes are sites that appear to be (A) H2 and H4 histone free (B) H1 and H2 histone free (C) H3 and H4 histone free (D) Nucleosome free

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

The formation of peptide cross-links between adjacent glycan chains in cell wall synthesis is called (A) Transglycosylation (B) Autoglycosylation (C) Autopeptidation (D) Transpeptidation