Describe Bar mutations in Drosophila melanogaster
What will be an ideal response?
Bar mutations are duplications in portions of the X chromosome.
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Some scientists predict that as atmospheric carbon dioxide levels increase, the pH of the oceans will drop, thus threatening coral and organisms within shells. What is the best explanation for this hypothesis?
A. Carbon dioxide combines with water to form a base. B. Carbon dioxide combines with water to form an acid. C. As the oceans warm, more water is evaporated, lowering the pH of the remaining water. D. As the pH of the ocean decreases, more carbon dioxide is released into the atmosphere. E. As the pH of the ocean increases, more carbon dioxide is released into the atmosphere.
Viroids differ from viruses in that they
A) are acellular. B) lack capsid proteins. C) are self-replicating. D) have latent forms that exist in some genomes. E) are associated with plant diseases.
Some people are unable to properly metabolize the drug Purinethol, which is given to patients with acute
lymphoblastic leukemia; therefore, such patients must be first tested for the associated genetic variant to determine proper dosage of the drug. This scenario best illustrates the use of _____. a. pharmacogenomics b. map-based sequencing c. positional cloning d. annotation of DNA sequences e. comparative genomics
Why is apoptosis potentially threatening to the healthy "neighbors" of a dying cell?
A) Cell death would usually spread from one cell to the next via paracrine signals. B) Lysosomal enzymes exiting the dying cell would damage surrounding cells. C) Bits of membrane from the dying cell could merge with neighboring cells and bring in foreign receptors. D) Neighboring cells would activate immunological responses.