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

1. Bangalore’s latitude is roughly 13˚N. At noon, on one day during which months would a vertical object cast no shadow? a. June and Dec b. Apr and Aug c. […]

Many organisms use cilia to move inside fluids. Which of the following statements is true for ciliary motion? The viscous friction coefficient for the motion of a cilium parallel to […]

There are three genes a, b, and c. Percentage of crossing over between a and b is 20%, b and c is 28% and a and c is 8%. What […]

E. coli was engineered to express two different fluorescent proteins (GFP and RFP) under identical promoters. The strain is engineered such that the two proteins are expressed at a 1:1 […]

Co-operation, including seemingly altruistic behaviours can be advantageous when there is Reciprocity. This theory of reciprocal altruism provides one explanation for cases of seemingly altruistic behaviour by various animals (for […]

Over time, cracks and damage occur in concrete. One way to repair this is by introducing microbes into concrete during the building process. These would heal the concrete if cracks […]

Acorn worms have been extensively studied as a way to understand the evolution of the chordates. Which of the following features is a distinct chordate affinity found in acorn worms. […]

Species that live on mountain tops are more prone to extinction due to climatic warming. This is because: They are all long-lived, and adapting to these changes in climate is […]

On an expedition to Mars, the newest rovers discover microbial life. Yay! On further probing, scientists discover that Martian microbes also use DNA, RNA, and proteins. Researchers changed one nucleotide […]

An altered form of a replicative DNA polymerase lacks 3’→ 5’ exonuclease activity. This alteration would most likely result in which of the following? A decrease in processivity An increased […]