Explain how a telomerase inhibitor might be an effective cancer treatment
What will be an ideal response?
Some cells contain an enzyme, telomerase, which makes extra telomere repeats, keeping the number of telomere repeats constant from one cell division to another. Telomerase is active in more than 90% of cancers, allowing cancer cells to divide indefinitely. Because telomerase is not active in most cells of the body but is active in cancer cells, the development of a telomerase inhibitor may prove to be an effective treatment for cancer. If a drug can shut off telomerase, the chromosomes in cancer cells would shorten in each cell division, leading to a halt in tumor growth and the eventual death of the tumor cells.
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Eukaryotic cells import large molecules through the process of ____ and secrete larger molecules by
____.
a. endocytosis; exocytosis b. diffusion; exocytosis c. exocytosis; endocytosis d. endocytosis; phagocytosis e. phagocytosis; pinocytosis
Carotenoids are accessory pigments that ____
a. absorb yellow and red light to assist in photosynthesis b. capture energy from light and use it directly in cellular respiration c. are masked by the presence of chlorophyll throughout the growing season d. absorb blue and violet wavelengths and reflect green and yellow e. reflect blue wavelengths
Which ancestors of modern humans migrated out of Africa to populate the rest of the world?
a. Homo habilis b. Homo erectus c. Neanderthals d. Cro Magnon e. Homo sapiens
A physician reports to you the lab results in identifying your genetic condition relating to your skin health. "DNA fingerprint" information indicates that you have two different versions of the allele for a particular skin protein, and this is called Select one:
a. heterozygous. b. homozygous. c. dominant. d. homologous. e. recessive.