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?

#Unit 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.

More Questions

#Question id: 23170

#Unit 13. Methods in Biology

#Question id: 4684

#Unit 3. Fundamental Processes

The depicted region contains two genes (cI and cro) and three promoters (PR, PL, and PRM), these promoters are direct the transcription such as;

a) PR and PL are is a weak promoter and only directs efficient transcription when an activator is bound just upstream

b) PR and PL are strong, constitutive promoters, they bind RNA polymerase efficiently and direct transcription without help from an activator

c) PRM, is a weak promoter and only directs efficient transcription when an activator is bound just upstream

d) PRM are strong, constitutive promoters, they bind RNA polymerase efficiently and direct transcription without help from an activator

Which of the following from the above combination is correct ?

#Question id: 11963

#Unit 7. System Physiology – Animal

#Question id: 305

#Unit 1. Molecules and their Interaction Relevant to Biology

Conditions for ionic bond formation is / are________

(A) Small cation, large anion

(B) Low IP of cation, high electron affinity of anion

(D) Less lattice energy

Correct answer is:

#Question id: 3696

#Unit 3. Fundamental Processes

In eukaryotes, which of the following DNA polymerase is required for mitochondrial DNA replication?