Category: GATE Biotechnology Previous Year Papers with Solutions

Q.45 Thermal death of microorganisms in the liquid medium follows first-order kinetics. If the initial cell concentration in the fermentation medium is 103 cells/ml and the final acceptable contamination level […]

Q.44 Determine the correctness or otherwise of the following Assertion (a) and the Reason (r) Assertion (a): Cytoplasmic male sterility (CMS) is invariably due to defect(s) in mitochondrial function. Reason […]

Q.43 Match the products in Group I with the microbial cultures in Group II used for their industrial production Group I Group II P. Gluconic acid 1. Leuconostoc mesenteroides Q. […]

Q.42 A cell has five molecules of a rare mRNA. Each cell contains 4 × 105 mRNA molecules. How many clones one will need to screen to have 99% probability […]

Q.41 Receptor R is over expressed in CHO cells and analysed for expression. 6 × 107 cells were incubated with its radioactive ligand (specific activity 100 counts per picomole). If […]

Q.40 The dissociation constant Kd for ligand binding to the receptor is 10-7 M. The concentration of ligand required for occupying 10% of receptors is Options: (A) 10-6 M (B) […]

Q.39 Dizygotic twins are connected to a single placenta during their embryonic development. These twins Options: (A) have identical MHC haplotypes (B) have identical TH cells (C) have identical T […]

Q.38 A mutant Gα protein with increased GTPase activity would Options: (A) not bind to GTP (B) not bind to GDP (C) show increased signaling (D) show decreased signaling Increased […]

Q.37 Match Group I with Group II Group I Group II P. Staphylococcus aureus 1. Biofilms Q. Candida albicans 2. Bacteriocins R. Mycobacterium tuberculosis 3. Methicillin resistance S. Lactobacillus lactis […]

Q.36 Match the items in Group I with Group II Group I (Vectors) Group II (Maximum DNA packaging) P. λ phage 1. 35–45 kb Q. Bacterial Artificial Chromosomes (BACs) 2. […]