Category: GATE Biotechnology Previous Year Papers with Solutions

Q.25 Krebs (TCA) cycle is ________ pathway. (A) only an anabolic (B) only a catabolic (C) an amphibolic (D) a pyogenic Krebs cycle, also known as the TCA cycle, serves […]

Q.24 An element that is present in a nucleotide but not in a nucleoside is ________. (A) carbon (B) nitrogen (C) oxygen (D) phosphorous Nucleotides form the building blocks of […]

Q.23 Which one of the following is the basic principle of Sanger’s DNA sequencing method? (A) Chain termination by incorporation of dideoxynucleotides (B) Chain elongation by incorporation of dideoxynucleotides (C) […]

Q.22 Which one of the following is an insect cell line? (A) HEK 293 (B) Sf9 (C) DH5α (D) CHO The correct answer is (B) Sf9, a widely used insect cell […]

Q.21 Which one of the following bacteriophages has a genome composed of single stranded circular DNA? (A) ØX174 (B) λ (C) T5 (D) P1 The Single-Stranded Circular DNA Virus (Correct […]

Q.20 A cultured skin fibroblast cell of a goat ‘P’ was fused with an enucleated ovum of a goat ‘Q’. The resultant activated early embryo was then transplanted into a […]

Q.19 During normal embryonic development of the mice paw, elimination of cells from the inter-digital space is due to ________. (A) apoptosis (B) meiosis (C) mutagenesis (D) necrosis The Role […]

Q.18 2-mercaptoethanol breaks the ________ covalent bond between light and heavy chains of an immunoglobulin molecule. (A) C-N (B) N-O (C) S-C (D) S-S 2-Mercaptoethanol Breaks S-S Covalent Bond in […]

Q.17 Co-translational translocation of proteins is observed in ________. (A) endoplasmic reticulum (B) Golgi complex (C) mitochondria (D) peroxisomes Co-translational translocation occurs primarily at the endoplasmic reticulum, where proteins enter […]

Q.16 Mendel’s ‘law of segregation’ applies to the segregation of ________ during gamete formation. (A) mitochondrial genes (B) alleles of a gene (C) linked genes on the same chromosome (D) […]