Once a person has been infected with Neisseria gonorrhoeae, the individual
A) acquires transient immunity, which prevents subsequent infection for about a year.
B) acquires no immunity, and thus could be reinfected immediately.
C) requires immunization by a vaccine.
D) requires immunization by an antiserum.
Answer: B
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Using the drawing of mRNA below, choose the letter that best fits the description. The special structure formed at this region is required for initiation of translation. ____
What will be an ideal response?
Nutritive tissue within angiosperm seeds.
Choose the LETTER of the best match: A. hypocotyl B. endosperm C. scutellum D. radicle E. epicotyl
What feature of genetic mutations can eventually lead to the evolution of new species?
A. Mutations never affect protein structure or function. B. Mutations always produce beneficial effects. C. Mutations produce changes in the DNA sequence of a gene. D. Mutations always produce harmful effects. E. Mutations are not a mechanism through which biological evolution occurs.
Muscle cells are responsible for obtaining energy so the body can perform voluntary and involuntary movement. Using you knowledge about organelles and muscles, how would a muscle cell differ from other types of animal cells?
A. The muscle cell would have larger centrioles than the other types of animal cells. B. The muscle cell would have more mitochondria than the other types of animal cells. C. The muscle cell would have a larger golgi apparatus than other types of animal cells. D. The muscle cell would have more endoplasmic reticulum than the other types of animal cells.