Which of the following is caused by a vitamin B1 (thiamine) deficiency?
A. scurvy
B. rickets
C. pellagra
D. beriberi
E. high blood sugar
D. beriberi
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Which is most likely to happen to a human polyploid?
a. natural abortion b. death around the age of 1 year c. survival until the early teens d. survival until the mid-thirties e. death around the age of 1 month
Of the following cells, which are most sensitive to reduced O2 levels?
a. heart cells b. kidney cells c. liver cells d. brain cells e. pancreatic cells
Wheat is an annual plant that produces many
seeds. Wheat is a __ species.
a. Type II b. Type III c. r-selected d. K-selected e. more than one of these
Which of the following statements is true concerning enzymatic activity?
A. As the temperature increases, most enzymatic reactions will still proceed at the same rate. B. Temperature has no impact on enzymatic activity. C. Each enzyme has a preferred pH at which the enzyme reaction rate is highest. D. Below a certain temperature, an enzyme will become denatured. E. Enzyme activity increases as substrate concentration decreases.