Tag: iit jam biotechnology previous year paper PYQ

Q.20 The major product formed in the given reaction is The major product of this reaction is the tert‑butyl‑substituted cyclopentyl aldehyde, i.e. option (D). The mechanism proceeds through diazotization of the […]

Q.19 Match the followingGroup I                                                    […]

Q.18 The bacterium that can tolerate high concentrations of salt and also fermentmannitol is(A) Staphylococcus aureus(B) Staphylococcus epidermis(C) Streptococcus pyogenes(D) Serratia marcescens Staphylococcus aureus is the bacterium that tolerates high salt […]

Q.17 Which of the following enzymes is absent in a person suffering fromAlkaptonuria?(A) Tyrosinase(B) Homogentisic acid oxidase(C) Catechol dioxygenase(D) Phenylalanine hydroxylase Homogentisic acid oxidase is absent in Alkaptonuria. This rare genetic […]

Q.16 A man having a dominant genetic trait (TT genotype) can tastephenylthiocarbamide (PTC), marries a woman who cannot taste PTC. The PTCtasting ability of their biological son and daughter is(A) […]

Q.15 An organism that causes obstruction of lymphatic system in humans is ____.(A) Borrelia burgdorferi(B) Brucella abortus(C) Yersinia pestis(D) Wuchereria bancrofti Wuchereria bancrofti is the correct answer (D). This filarial […]

Q.14 The zone of a pond system where respiration is more than production is calledas _____.(A) Limnetic zone(B) Littoral zone(C) Epilimnion zone(D) Benthic zone The correct answer is (D) Benthic zone. […]

Q.13 A frameshift mutation is caused by ____.(A) 5–Bromouracil(B) Acridine(C) Glutathione(D) Hypoxanthine A frameshift mutation is caused by (B) Acridine. This is the correct answer for the CSIR NET Life Sciences […]

Q.12 Which of the following activity is associated with Klenow fragment?(A) 5′–3′ exonuclease activity(B) 5′–3′ endonuclease activity(C) Polymerase activity(D) 3′–5′ endonuclease activity Answer: (C) Polymerase activity The Klenow fragment retains […]

Q.11 Bacteria containing a tuft of flagella that comes out from one pole is called ___.(A) Lophotrichous(B) Peritrichous(C) Monotrichous(D) Amphitrichous The correct answer is (A) Lophotrichous. Bacteria with a tuft of […]