What are the three strategies for defending against foreign organisms, cells, or molecules?

What will be an ideal response?


(1 ) Prevent foreign cells or molecules from entering the body. (2 ) Attack any foreign cell or molecule that enters the body. (3 ) Destroy the specific foreign cell or molecule that enters the body, and remember it.

Biology & Microbiology

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You are asked to determine whether sulfur bacteria are active in a particular area of an estuary. What observations or tests can you perform to confirm this activity?

What will be an ideal response?

Biology & Microbiology

During anaerobic respiration, a compound can serve as an electron donor as long as the ________ of the redox couple is ________ electronegative than that of the acceptor couple

a. E0´ / less b. E0´ / more c. ?G0´ / less d. ?G0´ / more

Biology & Microbiology

An allosteric inhibitor does which of the following?

a. decreases the concentration of an inactive enzyme. b. changes the shape of an enzyme. c. increases the concentration of a product. d. changes the shape of a substrate. e. increases the concentration of an enzyme-substrate complex.

Biology & Microbiology

An organism found in coastal waters that causes a food infection and gastroenteritis due to a variety of contaminated raw and undercooked seafood is

A. Chlamydia trachomatis. B. Helicobacter pylori. C. Vibrio parahaemolyticus. D. Campylobacter jejuni. E. Vibrio cholerae.

Biology & Microbiology