Which of the following was the first protein whose tertiary structure was determined?

A) myoglobin
B) insulin
C) actin
D) hemoglobin
E) collagen


Ans: A) myoglobin

Biology & Microbiology

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The active maintenance of a constant environment is referred to as:

A. homeostasis. B. equilibrium. C. stability. D. symmetry. E. balance.

Biology & Microbiology

An environment would be considered harsh to an organism if:

a. it would be difficult for the individual to maintain homeostasis. b. the temperatures are extreme. c. salinity varies. d. pressure gradients are large. e. light levels are low.

Biology & Microbiology

Which antibody is involved in allergic reaction?

a. IgA b. IgD c. IgE d. IgG e. IgM

Biology & Microbiology

Varieties of plants in which self-fertilization produces offspring that are identical to the parents are referred to as

A) hybrids. B) the F2 generation. C) monohybrid crosses. D) true-breeding.

Biology & Microbiology