Q.16 A microorganism isolated from a salt–rich (salt concentration –2 M) lake was found to possess diglycerol tetraethers, withpolyisoprenoid alcohol side chains, as the major lipid component of its cell […]
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CSIR NET Life Science Previous Year Questions and Solution on EXTENSION OF MENDELIAN PRINCIPLES (62)
![Q.15 Amino acid sequences of cytochrome e and ribulose S-phosphate epimerase from 40 organisms were chosen and phylogenetic trees were obtained for each of these two protein families Determine the correctness or otherwise of the following Assertion [a] and the Reason 1 Assertion (a): The two trees will not be identical Reason (r): The nature and frequency of mutations in the two families are different (A) Both [a] and are true and [r] is the correct reason for [a] (B) Both [a] and [r] are true but is not the correct reason for [a] (C) Both [a] and [r] are false. (D) [a] is false but [r] is true](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_15-11.png)
GATE Biotechnology 2020 Previous Year Papers with Solutions
Cytochrome c and Ribulose-5-Phosphate Epimerase Phylogenetic Trees
Q.15 Amino acid sequences of cytochrome e and ribulose S–phosphate epimerase from 40 organisms were chosen and phylogenetic trees were obtained for each of these two protein familiesDetermine the correctness […]
![Q.14 Which of the following are energy transducing membranes? [P] Plasma membrane of bacteria [Q] Inner membrane of chloroplasts [R] Inner membrane of mitochondria (A) P and Q only (B) P and R only (C) Q and R only (D) P, Q and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_14-11.png)
GATE Biotechnology 2020 Previous Year Papers with Solutions
Energy Transducing Membranes
Q.14 Which of the following are energy transducing membranes?[P] Plasma membrane of bacteria[Q] Inner membrane of chloroplasts[R] Inner membrane of mitochondria(A) P and Q only(B) P and R only(C) Q […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
NaHCO3 for pH Maintenance
Q.13 Which one of the following media components is used to maintain pH in mammalian cell culture!(A) CaCI2(B) MgSO4(C) Nacl(D) NaHCO3 NaHCO3 serves as the key buffer to maintain pH […]
![Q.12 Which of the following types of molecules act as biological catalysts? [P] Protein [Q] RNA [R] Phospholipid (A) Pand only (B) P and R only (C) Q and R only (D) P, Q and R](https://www.letstalkacademy.com/wp-content/uploads/2026/01/slide_12-11.png)
GATE Biotechnology 2020 Previous Year Papers with Solutions
Biological Catalysts
Q.12 Which of the following types of molecules act as biological catalysts?[P] Protein[Q] RNA[R] Phospholipid(A) Pand only(B) P and R only(C) Q and R only(D) P, Q and R Proteins […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Agrobacterium Ti Plasmid T-DNA
Q.11 Which one of the following statements about Agrobacterium Ti plasmid is CORRECT?(A) Vir genes are located within the T–DNA Segment(B) Phytohormone biosynthesis genes are located outside the T–DNA segment(C) […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Adeno-Associated Virus Genomic Integration
Q.10 A vector derived from which one of the following viruses is used for high– frequency genomic integration of a transgene in animal cells?(A) Adenovirus(B) Adeno–associated virus(C) Lentivirus(D) Herpes simplex […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
Viral Thymidine Kinase in Positive-Negative Selection
Q.9 During a positive–negative selection process, transformed animal cells expressing are killed in presence of ganciclovir in the medium.(A) pyruvate kinase(B) viral thymidine kinase(C) viral serine/threonine kinase(D) viral tyrosine kinase […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
His-Tagged Proteins Separation
Q.8 Two monomeric His–tagged proteins of identical molecular weight are present in a solution, pls of these two proteins are 5.6 and6.8. Which one of the following techniques can be […]
GATE Biotechnology 2020 Previous Year Papers with Solutions
DNA Synthesized from RNA Template
Q.7 DNA synthesized from an RNA template is called(A) recombinant DNA(B) transcript(C) T–DNA(D) complementary DNA Correct Answer: (D) complementary DNA DNA synthesized from an RNA template through reverse transcription is […]
