Practice Questions

TLS Online TPP Program

#Question id: 5804

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?

#Unit 8. Inheritance Biology

The ΔF508 cystic fibrosis mutation is a beneficial mutation.
The ΔF508 cystic fibrosis mutation is a lethal mutation.
The ΔF508 cystic fibrosis mutation is a conditional mutation.
The ΔF508 cystic fibrosis mutation is a neutral mutation

More Questions

TLS Online TPP Program

#Question id: 8842

#Unit 9. Diversity of Life Forms

In terms of the hierarchical organization of life, a bacterium is at the __________ level of organization, whereas a human is at the __________ level of organization

TLS Online TPP Program

#Question id: 24642

#Unit 10. Ecological Principles

Which of the following is not the component of Soil?

TLS Online TPP Program

#Question id: 8886

#Unit 9. Diversity of Life Forms

Which characteristic is shared by both cnidarians and flatworms?

TLS Online TPP Program

#Question id: 18375

#Unit 12. Applied Biology

What is the function of Siderophores secreted by bacteria

TLS Online TPP Program

#Question id: 8902

#Unit 9. Diversity of Life Forms

What do craniates have that earlier chordates did not have?