Category: GATE Biotechnology Previous Year Papers with Solutions

Q.55 Aspergillus niger is grown in a 10,000 L stirred batch bioreactor under aerated conditions to produce citric acid. At steady state oxygen transfer conditions, the specific oxygen uptake rate […]

Q.54 Fermentation medium is cooled from 121 °C to 30 °C in a double pipe heat exchanger. If cold water is flowing in the counter-current direction and is heated from […]

Q.53 Under complete cell washout condition in a chemostat with sterile feed, which of the following statements is/are correct? (A) Biomass concentration in the reactor is maximum (B) Substrate concentration […]

Q.52 Which of the following factors can affect the growth of a microbial culture in a batch cultivation process? (A) pH of the medium (B) Osmolarity of the medium (C) […]

Q.51 Which of the following conditions induce(s) the expression of β-galactosidase gene in the lac operon? (A) Absence of glucose (B) Absence of lactose (C) Presence of glucose (D) Presence […]

Q.50 Which of the following statements regarding the below mentioned mRNA sequence is/are TRUE? 5`-UGAUGAGCCUUAACCGGGAACGAAUUUAAG-3` (A) It contains nine codons in the reading frame (B) It contains ten codons in […]

Q.49 Which of the following is/are synthetic auxin(s) that does/do NOT occur naturally? (A) 2,4-Dichlorophenoxyacetic acid (B) Indole-3-acetic acid (C) Indole-3-butyric acid (D) 1-Naphthaleneacetic acid Synthetic Auxins in Plant Biology: […]

Q.48 Under which of the following conditions, a mammalian somatic cell fails to undergo mitosis during cell cycle? (A) Initiation of cell plate formation (B) Incomplete DNA replication (C) Chiasmata […]

Q.47 Which of the following is/are considered as biotic elicitor(s) in plant cell culture? (A) Cellulase (B) Chitin (C) Chitosan (D) Mercuric chloride Biotic elicitors trigger defense responses in plant […]

Q.46 Which of the following features help(s) in distinguishing alleles using restriction fragment length polymorphism (RFLP)? (A) Differences in the number of recognition sites for a given restriction enzyme (B) […]