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TLS Online TPP Program

#Question id: 4319

Why are BRCA1 and BRCA2 considered to be tumor-suppressor genes?

#Molecular Biology

  1. Their normal products participate in repair of DNA damage.

  2. The mutant forms of either one of these prevent breast cancer.

  3. The normal genes make estrogen receptors.

  4. They block penetration of breast cells by chemical carcinogens.

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TLS Online TPP Program

#Question id: 4565

#Microbiology

Darwinʹs mechanism of natural selection required long time spans in order to modify species. From whom did Darwin get the concept of Earthʹs ancient age?
TLS Online TPP Program

#Question id: 4566

#Microbiology

Which of these naturalists synthesized a concept of natural selection independently of Darwin?
TLS Online TPP Program

#Question id: 4567

#Microbiology

Charles Darwin was the first person to propose
TLS Online TPP Program

#Question id: 4568

#Microbiology

 In Darwinʹs thinking, the more closely related two different organisms are, the
TLS Online TPP Program

#Question id: 4569

#Microbiology

Which of the following must exist in a population before natural selection can act upon that population?
TLS Online TPP Program

#Question id: 4570

#Microbiology

Which pair would probably have agreed with the process that is depicted by this tree?