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TLS Online TPP Program

#Question id: 4319

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

#3. Fundamental Processes

  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: 2613

#2. Cellular Organization

If increasing the number of trp codon,
TLS Online TPP Program

#Question id: 9566

#10. Ecological Principles

Which of the following adaptations helps kangaroo  rats conserve water?
TLS Online TPP Program

#Question id: 750

#1. Molecules and their Interaction Relevant to Biology

In strong acid and at elevated temperatures, for example perchloric acid (HClO4) at more than 100°C, nucleic acids tend to:
TLS Online TPP Program

#Question id: 9197

#9. Diversity of Life Forms

What is the biological significance of genetic diversity between populations?
TLS Online TPP Program

#Question id: 1109

#4. Cell Communication and Cell Signaling

What role do phosphatases play in signal transduction pathways?