Bacteriophages are viruses that ____
a. catalyze bacterial reproduction
b. attach to bacterial cells and extract bacterial DNA
c. interfere with DNA replication in the cytoplasm of cells
d. produce histones
e. infect and copy themselves inside bacterial cells
e
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Recombinant DNA technology does not rely on which of the following enzymes?
A. DNA ligase B. RNA methylase C. Reverse transcriptase D. Restriction endonucleases
In modern terminology, diversity is understood to be a result of genetic variation. Sources of variation for evolution include all of the following except
A) mistakes in translation of structural genes. B) mistakes in DNA replication. C) translocations and mistakes in meiosis. D) recombination at fertilization. E) recombination by crossing over in meiosis.
True or false: The valence electrons of an atom are at the lowest energy level because their increased distance from the nucleus reduces their attraction to the atom's protons
A. true B. false
Recombination frequency is ____
a. high if two genes are linked b. a physical measurement of the distance between two genes on a chromosome c. low if crossovers are common between two genes d. measured in centigrams e. used to create linkage maps