Practice Questions

TLS Online TPP Program

#Question id: 12570

Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now in a biodiversity crisis?

#10. Ecological Principles

Humans are ethically responsible for protecting endangered species.
Scientists have finally identified most of the species on earth and are thus able to Quantify the number of species becoming extinct.
The current rate of extinction is high and human activities threaten biodiversity at all levels.
Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct.

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TLS Online TPP Program

#Question id: 23142

#13. Methods in Biology

What is the value of numerical aperture of microscope if glycerol is used and sin α= 70^o?

TLS Online TPP Program

#Question id: 16495

#12. Applied Biology

An example of very useful scorable marker isolated from the jellyfish (Aequorea victoria)

TLS Online TPP Program

#Question id: 12408

#6. System Physiology – Plant

Cleavage of the carotenoid by the enzyme NCED (9-cis-epoxycarotenoid dioxygenase) is a rate-limiting highly regulated step in ABA synthesis that produces the 15-carbon precursor molecule xanthoxin in

TLS Online TPP Program

#Question id: 8964

#9. Diversity of Life Forms

Phylogenetic trees are best described as

TLS Online TPP Program

#Question id: 680

#1. Molecules and their Interaction Relevant to Biology

Super secondary structures that contain recognizable combinations of α-helices, β-strands and loops (e.g. the Greek Key) are called ________.