Which of the following gene mutations is least
likely to impact the protein?
a. A conservative substitution.
b. A non-conservative substitution.
c. An amino acid deletion.
d. An amino acid insertion.
e. All would be the same
A
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Which of the following is not needed for DNA replication?
A. ribosomes B. DNA C. nucleotides D. enzymes E. None of these are needed.
Which of the following phrases INCORRECTLY completes the following statement? The Hox complexes of mammals
A. encode genes homologous to those found in the antennapedia and bithorax complexes. B. follow the colinearity rule. C. are located on a single chromosome, similar to what is seen in Drosophila. D. determine cell fate on the anteroposterior axis. E. suggest there is a basic body plan that is followed by all multicellular organisms.
Answer the following statements true (T) or false (F)
1) Plasmids are created exclusively in research laboratories and do not occur naturally. 2) Bacteria that live in extreme environments, such as thermal vents on the ocean floor, have evolved genes that allow them to use the resources within that environment. 3) All the genes in a species' core genome are located on the bacterial chromosome, whereas the genes of the pangenome are carried on plasmids. 4) Mapping genes by conjugation can be performed by interrupted-mating experiments in which conjugation is physically disrupted at 1-minute intervals. 5) Scientists can identify the gene mutated in a bacterial auxotroph by transforming the cells with a genomic library in which fragments of the auxotroph's genome have been cloned into plasmids. 6) Multidrug resistance is not a major health concern because new antibiotics are easily and frequently identified.
Which of the following is true of a
methylation?
a. the particular methylation is passed on in mitosis b. chemicals in cigarette smoke remove methyl groups c. methylation is never a random event d. histones are immune to methylation e. methylation is always harmful