Structural proteins

A) include receptor molecules.
B) include hemoglobin.
C) are found in hair and tendons.
D) include ovalbumin, a protein found in egg white.


Answer: C

Biology & Microbiology

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The type of reproductive isolation in which two populations are separated due to the sperm cells of one not being able to recognize the egg cells of the other is

A. hybrid inviability. B. gametic isolation. C. temporal isolation. D. hybrid infertility. E. ecological isolation.

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The most acute allergic response is anaphylactic shock, which can be deadly due to the histamine-induced

A) increase in capillary permeability. B) increase in peripheral resistance that decreases cardiac output. C) decrease in peripheral resistance that decreases mean arterial pressure. D) decrease in peripheral resistance that increases cardiac output. E) local decrease in resistance with little effect on mean arterial pressure.

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Plants produce a polysaccharide made of glucose known as ________, which is virtually indigestible by most animals

Fill in the blank(s) with correct word

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Which of the following intestinal protozoa are considered parasites of humans only?

A) Entamoeba histolytica B) Balantidium coli C) Cyclospora cayentanensis D) Giardia intestinalis E) both Entamoeba histolytica and Cyclospora cayentanensis

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