The receptors to which animal virus attachment proteins usually bind are

A. proteins.
B. carbohydrates.
C. nucleic acid.
D. lipids.
E. glycoproteins.


E

Biology & Microbiology

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Biodegradation of oil in soil is difficult due to a lack of ________, which is very expensive to introduce into the sediments. 

A. phosphorous B. carbon C. nitrogen D. oxygen

Biology & Microbiology

In a population of grizzly bears, the largest adults are most likely to survive and reproduce, while the smallest adults lose most competitions for resources and produce fewer offspring. This is an example of ________ selection

a. stabilizing b. directional c. disruptive d. sexual

Biology & Microbiology

During digestion, sodium bicarbonate is released into the small intestine to help neutralize the pH of the acids coming from the stomach. The hormone responsible for stimulating the release of this bicarbonate is called ________

Fill in the blank(s) with correct word

Biology & Microbiology

The movement of water molecules during osmosis is due to

A. diffusion. B. active transport. C. pinocytosis. D. endocytosis.

Biology & Microbiology