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

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TLS Online TPP Program

#Question id: 4126

#Unit 3. Fundamental Processes

Which one of the following is true about the genetic code?

TLS Online TPP Program

#Question id: 12244

#Unit 10. Ecological Principles

The amount of genotypic variation in a natural population can be increased by all of the following EXCEPT

TLS Online TPP Program

#Question id: 2647

#Unit 2. Cellular Organization

Which of this mode of trp regulation is not possible in eukaryotes?

TLS Online TPP Program

#Question id: 19699

#Unit 13. Methods in Biology

What is Einthoven’s Law?

TLS Online TPP Program

#Question id: 10505

#Unit 6. System Physiology – Plant

Pseudomonas aeruginosa can alleviate the symptoms of abiotic stress by releasing of antibiotics, the amounts of the compounds released by P. aeruginosa are controlled by