Practice Questions

TLS Online TPP Program

#Question id: 5318

Humans have 23 pairs of chromosomes, and chimps have 24 pairs of chromosomes. What is the most likely explanation for these differences in human and chimp genomes?

#Unit 11. Evolution and Behavior

The common ancestor of humans and chimps had 24 pairs of chromosomes. During human evolution, two human chromosomes fused end to end.
In the evolution of chimps, new adaptations resulted from additional chromosomal material.
At some point in evolution, human and chimp ancestors reproduced with each other.
Errors in mitosis resulted in an additional pair of chromosomes in chimps.

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TLS Online TPP Program

#Question id: 11141

#Unit 7. System Physiology – Animal

The operation of the sodium-potassium pump moves ________.

TLS Online TPP Program

#Question id: 2954

#Unit 2. Cellular Organization

Cyclin concentrations are highest during which periods of the cell cycle?

TLS Online TPP Program

#Question id: 10267

#Unit 8. Inheritance Biology

Exceptions of law of dominance are

a. Incomplete dominance

b. Codominance

c. Nondisjunction

d. Linkage

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#Question id: 7277

#Unit 5. Developmental Biology

According to this model, Which of the following statements are correct?

TLS Online TPP Program

#Question id: 23193

#Unit 13. Methods in Biology

When you try to image two fluorescent spots separated by 75 nm the fluorescence overlap so much that they look like one spot. Which microscopy can resolve this?