Sticky ends are so named because ____
a. they are single stranded and will base pair with complementary sequences
b. covalent bonds spontaneously form between them to form a continuous DNA molecule
c. primers hybridize to them during the first step of PCR
d. they hybridize to a DNA sequence of interest
e. they stick to invading viral DNA
ANSWER: a
You might also like to view...
Which of the following statements about NAD+ is true?
A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle. B) NAD+ has more chemical energy than NADH. C) NAD+ is oxidized by the action of hydrogenases. D) NAD+ can donate electrons for use in oxidative phosphorylation. E) In the absence of NAD+, glycolysis can still function.
A researcher is interested in studying gene X, but not gene Y, in Drosophila. What does she need to amplify only gene
X from the Drosophila genome?
a. some prior knowledge of the gene X sequence so appropriate primers can be designed b. a heat-stable restriction endonuclease c. restriction endonucleases that cut gene X but not gene Y d. a cloning vector that has multiple antibiotic resistance genes e. a cloning vector that will ligate to gene X but not to gene Y
During the pre-embryonic period, a single sperm passes through the zona pellucida. In the vast majority of cases, where does this process occur?
A) in the uterus B) in the ovary C) in the oviduct (fallopian tube) D) in the placenta
Which of the following features are shared by all of the jawed fish?
A. ectothermic, smooth nonscaly skin and bony skeleton B. bony exoskeleton, gills and scales C. cartilaginous or bony endoskeleton, gills and scales D. endothermic, gills and scales