Regulatory proteins:a
defend against foreign invaders.
b. store nutrients.
c. catalyze a specific chemical reaction.
d. control the expression of specific genes.
e. strengthen and protect cells and tissues.
D
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The eggs of which of the following intestinal parasites are not commonly found in feces and must be detected by other diagnostic techniques?
a. Giardia lamblia b. Cryptosporidium parvum c. Clonorchis sinensis d. Enterobius vermicularis
The reagent used in the "string test" is:
a. bile solubility. b. sodium deoxycholate. c. bile esculin. d. 0/129 (2,4-diamino-6,7-diisopropylpteridine).
Chimpanzees are considered to be our closest extant relative because
A. they have prehensile tails. B. their genome is 99% identical to the human genome. C. their upper/lower limbs equally account for bearing the body weight. D. they have flat, spreading noses. E. they are a highly social species.
Monoploids are useful in plant breeding because
A) they can be used to select for plants with desirable recessive traits. B) they will not express any undesirable recessive traits. C) they are one step in the path to creating desirable polyploid plants. D) they are typically resistant to commercial herbicides.