Practice Questions

TLS Online TPP Program

#Question id: 8717

Molecular clocks are more reliable when ________.

#9. Diversity of Life Forms

the surrounding pH is close to 7.0
most mutations of highly conserved DNA sequences should have no functional effect
the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
a significant proportion of mutations are not acted upon by natural selection

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TLS Online TPP Program

#Question id: 5228

#11. Evolution and Behavior

Multigene families are

TLS Online TPP Program

#Question id: 11384

#10. Ecological Principles

Two islands, P and Q, are similar in habitat and other features. They are 100 and 200 km2 in size respectively, but have the same number of species. Which of the following statements can independently explain this observation?

(i) P is closer to the mainland than Q

(ii) P is further away from the mainland than Q

(iii) P has higher speciation rates than Q

(iv) P has lower speciation rates than Q

TLS Online TPP Program

#Question id: 10949

#7. System Physiology – Animal

Which of the following applies to AIDS patients?

TLS Online TPP Program

#Question id: 21250

#7. System Physiology – Animal

A 56-year-old female was diagnosed with a tumor near the base of the skull, impinging on her optic tract. Which of the following statements about the central visual pathway is correct?