Frailty in the elderly has been correlated with
a. an increase in abundance of Firmicutes.
b. a decrease in abundance of Bacteroides.
c. a decrease in abundance of Firmicutes.
d. none of the above.
Answer: C
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When DNA fragments are separated by electrophoresis, ________
a. the largest fragments move the fastest b. neutrally charged fragments move the fastest c. the smallest fragments move the fastest d. all the fragments move at the same rate
There are how many different kinds of RNA
codons? a. 3 b. 12 c. 28 d. 64 e. 120
A concentration gradient ceases to exist when
a. all the molecules have moved from high concentration to low. b. the membrane pores close. c. the temperature drops. d. there is no net movement. e. bulk flow intervenes.
Cereal grains come from which types of plants?
A) dicots B) monocots C) legumes D) tubers