Tag: TIFR Previous Year Question Papers Biology PYQ With Answer Key Download

6. The recent all India tiger census counted all individuals above the age of 1 year as adults. An earlier estimate four years ago included only individuals above the age […]

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. […]