Category: TIFR Previous Year Question Papers 2020 Biology With Answer Key Download

5. Which of the following statements is incorrect about meiosis? a. Two rounds of DNA replication occur b. The chromosome number is reduced to half c. Four daughter cells are […]

4. In a new species of bacteria, tRNA anticodons are recognized by two nucleotide bases instead of three. What would be the number of amino acids and the number of […]

3. In PCR, annealing temperature of the primer does not depend on: a. Primer length b. dNTP concentration c. The secondary structure of the primer d. The GC content of […]

2. Which one of the following would produce the highest variability of gametes if the alleles assorted independently? a. Yy PP Tt Rr b. Yy Pp Tt Rr c. YY […]

1. Ocean acidification has multiple consequences on marine life, including reducing availability of carbonate for skeletal formation of ocean organisms, increasing coral bleaching, and other impacts. The main driver of […]

15. Which of the options listed below show the most appropriate set of reagents to carry out the following reaction? a. i. EtMgBr, ii. HCl b. i. HCl, ii. EtMgBr […]

14. A molecule has formula C4H8O2. Based on the following proton NMR spectrum, what is the structure? a. A b. B c. C d. D The correct structure is option […]

13. An acidic solution containing 0.01 M La3+ is treated with NaOH until La(OH)3 precipitates. At what pH does this occur? (Ksp=2×10-21) a. 6.8 b. 7 c. 7.8 d. 8 […]

12. Between metal carbonyl complexes A = M(CO)4(PEt3) and B = M(CO)4(PPh3), the ability to act as a catalyst for nucleophilic addition to olefin is a. similar for both b. […]

11. Arrange the following compounds in increasing order of acid strength: I: Phenol, II: o-nitrophenol, III: m-nitrophenol, IV: 2,4-dinitrophenol, V: 2,4,6- trinitrophenol a. I < V < IV < II […]