T-helper cells are important in augmentation of which of the following
I. Antibody production
II. Mixed lymphocyte reaction
III. Delayed-type hypersensitivity reactions
A. I only
B. II only
C. I and II only
D. II and III only
E. I, II and III
Answer: E. I, II and III
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The size and shape of a colony is not useful for identification of a microorganism because most microorganisms produce colonies that are indistinguishable from one another.
Answer the following statement true (T) or false (F)
What process increases the size of a muscle?
a. increased muscle cell division b. addition of muscle companion cells c. stretching of individual muscle cells d. synthesis of new protein filaments e. more than one of these
Which food is most likely to contain all essential amino acids?
A) beef B) carrots C) corn D) rice
A DNA molecule or a region of DNA that replicates as an individual unit is known as a
A. primer. B. Okazaki fragment. C. replicon. D. replication fork.