If DNA were a spiral staircase, the nitrogenous bases would be
A) the railings.
B) the wall.
C) the central support.
D) the steps.
Ans: D) the steps.
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Some animals have no gills when young, but then develop gills that grow larger as the animal grows larger. What is the reason for this increase in gill size?
A) The young of these animals are much more active than the adult, which leads to a higher BMR (basal metabolic rate) and, therefore, a higher need for oxygen. B) Relative to their volume, the young have more surface area across which they can transport all the oxygen they need. C) The young have a higher basal metabolic rate. D) Relative to their surface area, the young have more body volume in which they can store oxygen for long periods of time.
ATP
a. can be produced by endocytosis. b. is the by-product of the biosynthesis of organic compounds such as glucose. c. is produced in greatest amounts during anaerobic respiration. d. is released in aerobic respiration. e. is released in anaerobic respiration.
Two formal terms used to describe categories of mutational nucleotide substitutions in DNA are ________
A) error prone and spontaneous B) sense and antisense C) base analogs and frameshift D) euchromatic and heterochromatic E) transversions and transitions
Dicots evolved ________ monocots.
A. before B. after