Category: TIFR Previous Year Question Papers 2019 Biology With Answer Key Download

5. How would you test whether a phenotypic difference between two populations of a plant is due to environmentally induced plasticity or evolutionary adaptation? a. DNA sequencing b. RNA sequencing […]

4. A geneticist crossed two pure-bred (homozygous) tall and short plants. In the F1 generation she observed that all the offspring were of intermediate height. If she crosses one of […]

3. Protein X is composed of 700 amino acids. When resolved on denaturing PAGE it shows a band corresponding to 130 kDa. The probable reason for such discrepancy is a. […]

2. Platelets contain a. Both genomic and mitochondrial DNA b. Only mitochondrial DNA c. Only genomic DNA d. No DNA Platelets contain both genomic and mitochondrial DNA, but the majority […]

1. Glucokinase phosphorylates glucose in liver only when glucose levels are higher than normal. What property of glucokinase is responsible for this? a. High molecular weight b. High Km c. […]

15. You are given an oligonucleotide whose molecular weight is 10000 Daltons. Assuming you want to make 100 μl of 100 μM stock how much oligonucleotide would you need? a. […]

14. Labelling of proteins with iodine is used for tracing. Which amino acid does iodine react with. a. Alanine b. Aspartate c. Lysine d. Tyrosine Iodine Labelling of Proteins: Tyrosine […]

13. Which compound is most acidic? a. H2O b. H2S c. H2Se d. NH3 The most acidic compound is H₂Se (option c). Among H₂O, H₂S and H₂Se, acidity increases down […]

12. Consider a reversible reaction 𝐴 ⇌ 𝐵 with forward and backward rate constants 𝑘! = 𝑘! = 1 sec!!. Suppose we start with a 1 molar solution of A. […]

11. 4.8g of gas at 27°C occupied the same volume as 1g of hydrogen at 17°C and at the same pressure. What is the molecular weight of the gas? a. […]