Can one gene make different proteins?
A. No, because genes do not make proteins
B. No, because one gene codes only for a single protein
C. Yes, by modifying the original DNA
D. Yes, by splicing the resulting mRNA differently (i.e., removing different exons)
Answer: D
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What is the difference between cross- and self-fertilization?
A) In cross-fertilization the pollen from one plant is used to fertilize the egg of another plant. B) In cross-fertilization the pollen from one plant is used to fertilize the egg from the same plant. C) In self-fertilization the pollen from one plant is used to fertilize the egg from another plant. D) In cross-fertilization insects are used to pollinate the plants, whereas in self-fertilization the investigator pollinates the plants.
The first region where water and sodium are
reabsorbed is the a. glomerulus. b. proximal tubule. c. distal tubule. d. loop of Henle. e. collecting duct.
Which of the following bacteria was carried by Typhoid Mary in the 1900s?
A) Klebsiella pneumoniae B) Pseudomonas aeruginosa C) Salmonella typhi D) Staphylococcus aureus E) Escherichia coli
Which of the following streptococcal diseases has a toxigenic type of pathogenesis?
A. Scarlet fever B. Rheumatic fever C. acute glomerulonephritis D. impetigo E. glanders