Why do cells use monosaccharides for cellular fuel?
What will be an ideal response?
Breaking the bonds of sugars releases energy that can be harnessed to power other cellular processes.
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You are interested in the minimum set of genes necessary for survival of a eukaryotic microorganism such as Saccharomyces cerevisiae. Design an experiment to systematically test which genes are essential for survival and which are not under high nutrient,
What will be an ideal response?
How can a mutation in a tumor-suppressor gene behave as a recessive allele at the cellular level, but appear as a dominant allele in pedigree analysis?
A) Some functional protein can still be produced in a cell heterozygous for a loss-of-function allele; however, an additional mutation can inactivate the second allele, eliminating all functional protein allowing cancer to occur in many family members. B) A single functional allele is sufficient to regulate the cell cycle, but not sufficient to promote apoptosis, allowing cancer to develop in every generation. C) A cell with half the amount of the functional tumor-suppressor protein can form benign tumors that will occur in every generation in the pedigree. D) Some functional protein can still be produced in a cell heterozygous for a loss-of-function allele; but loss-of-function tumor-suppressor alleles are so common in the population that many individuals are homozygous.
Human vocal cords are located in the
a. glottis. b. pharynx. c. trachea. d. larynx. e. bronchus
A reaction that requires oxygen is called
A. aerobic. B. synthesis. C. phosphorylation. D. anaerobic.