Practice Questions

TLS Online TPP Program

#Question id: 16323

Tastes and smells are distinct kinds of environmental information where ________.

#Unit 7. System Physiology – Animal

neural projections from taste receptors reach different parts of the brain than the neural projections from olfactory receptors
the single area of the cerebral cortex that receives smell and taste signals can distinguish tastes and smells by the pattern of action potentials received
tastant molecules are airborne, whereas odorant molecules are dissolved in fluids
distinguishing tastant molecules requires learning, whereas smell discrimination is an innate process

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TLS Online TPP Program

#Question id: 5805

#Unit 8. Inheritance Biology

In Himalayan rabbits, the ears, feet, and muzzle are pigmented while the rest of the body is white. This is because they express an enzyme variant that is ineffective at body temperature but functions at the lower temperatures experienced by cells of the extremities. This is an example of:

TLS Online TPP Program

#Question id: 5804

#Unit 8. Inheritance Biology

The gene that is mutated in cases of cystic fibrosis encodes an ion transporter protein normally expressed in the respiratory and digestive tracts along with other locations. Individuals homozygous for the most common mutation in this gene (ΔF508) died at very early ages prior to the advent of advanced medical intervention. Despite this, the mutation exists at relatively high frequency in populations of European descent. One potential explanation is that heterozygotes for such mutations may be relatively immune to the lethal effects of diseases such as typhoid fever. Which statement below is most accurate?

TLS Online TPP Program

#Question id: 5803

#Unit 8. Inheritance Biology

The mutation which causes sickle cell anemia in humans:

TLS Online TPP Program

#Question id: 5802

#Unit 8. Inheritance Biology

A wild type allele:

TLS Online TPP Program

#Question id: 5801

#Unit 8. Inheritance Biology

Which of the following point mutations would be most likely to affect protein function?