Each DNA strand has a backbone that consists of
alternating
a. covalent and ionic bonds.
b. nitrogen-containing bases.
c. hydrogen bonds.
d. sugar and phosphate molecules.
e. covalent and hydrogen bonds.
Answer: d
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The acquisition of a relatively small amount of genetic material from an organism that is not a parent of the receiving organism is most specifically referred to as:
A. vertical descent. B. horizontal gene transfer. C. endosymbiosis. D. parasitism. E. Darwinian evolution.
Biosynthetic reactions that require energy for the conversion of molecular subunits into larger molecules are called
A. kinetic energy. B. catabolic reactions. C. precursor molecules. D. anabolic reactions.
You have an opportunity in biology lab to observe the prepared, stained karyotypes of a stallion, a mare, and their foal offspring horses. Banding patterns of some of the autosomes from the foal match those of the stallion, while others from the foal match those of the mare. This variability is produced in meiosis due to
A. random alignment of chromosome pairs. B. semiconservative replication. C. random fertilization. D. mutation. E. nonrandom fertilization.
George liked to go for very long runs; we can assume that this chemical becomes depleted during those marathons: ________
Fill in the blank(s) with correct word