How might a pathogenic bacterium be affected by antibodies?
a. The antibodies may stick to multiple bacteria, causing agglutination.
b. The antibodies may coat the surface of the bacteria (opsonization), allowing for it to be tagged for phagocytosis.
c. The antibodies may block proteins necessary for binding the pathogen to the host.
d. The antibodies may block proteins necessary for binding the pathogen to the host, may opsonize the bacterium, or may agglutinate bacteria.
Ans: d. The antibodies may block proteins necessary for binding the pathogen to the host, may opsonize the bacterium, or may agglutinate bacteria.
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. Exceptions to the principle of independent assortment were discovered and explained by ____ as resulting from genes
being physically associated with each other on the same chromosome.
a. Watson b. Sturtevant c. Morgan d. Mendel e. Crick
Which of the following is the purpose of identifying biodiversity hotspots?
a. focusing conservation on areas with high numbers of endemic species b. establishing sanctuaries for migratory birds that are nearing extinction c. preventing habitat destruction caused by the timber and palm oil industries d. reintroducing species to newly restored ecosystems and habitats
In glycolysis, a six-carbon glucose molecule is converted to two three-carbon molecules of:
a. pyruvate. b. acetate. c. coenzyme A. d. oxaloacetate. e. citrate.
What is true of the hormone glucagon? Check all that apply.
_____ It helps to maintain homeostatic levels of glucose. _____ It is synthesized by the pancreas when blood sugar levels decrease. _____ It is synthesized in the same endocrine gland that secretes insulin. _____ It stimulates appetite.