Which organism produces oocysts that release sporozoites into the intestine and is life-threatening in AIDS patients?
a) Entamoeba histolytica
b) Giardia intestinalis
c) Toxoplasma gondii
d) Cryptosporidium parvum
Ans: d) Cryptosporidium parvum
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In the figure above, at which of the numbered regions would you expect to find cells at metaphase?
A) I and IV B) II only C) III only D) IV only E) V only
The C4 photosynthetic cycle is more efficient than the C3 cycle when the ________
a. climate is hot and dry b. soil is deficient in nitrogen c. climate is cool and damp d. plant is growing at a high altitude
Which of the following would be affected when a protein is denatured?
a. primary structure b. side chains c. tertiary structure d. amino groups
The Ames Test uses______ to determine the ability of a compound to cause______.
a) Bacteria, AIDS b) Viruses, Cancer c) Bacteria, Cancer d) Viral cells, AIDs