Question: Kinetochores include motor proteins that exert pulling forces on spindle microtubules.
Answer Options:
• ⊚ true
• ⊚ false
Answer: true
Question: Plasmids are created exclusively in research laboratories and do not occur naturally.
Answer Options:
• ⊚ true
• ⊚ false
Answer: false
Question: 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.
Answer Options:
• ⊚ true
• ⊚ false
Answer: true
Question: All the genes in a species’ core genome are located on the bacterial chromosome, whereas the genes of the pangenome are carried on plasmids.
Answer Options:
• ⊚ true
• ⊚ false
Answer: false
Question: Mapping genes by conjugation can be performed by interrupted-mating experiments in which conjugation is physically disrupted at 1-minute intervals.
Answer Options:
• ⊚ true
• ⊚ false
Answer: true
Question: 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.
Answer Options:
• ⊚ true
• ⊚ false
Answer: true
Question: Multidrug resistance is not a major health concern because new antibiotics are easily and frequently identified.
Answer Options:
• ⊚ true
• ⊚ false
Answer: false
Question: FISH analysis is likely to detect which type of change in DNA?
Answer Options:
• A) silent point mutations
• B) translocations
• C) duplications
• D) frameshift point mutations
• E) deletions
Answer: B) translocations
Question: Which process can cause duplications?
Answer Options:
• A) repair of one double-strand break by homologous recombination
• B) repair of two double-strand breaks that occur in different places on different sister chromatids
• C) repair of two double-strand breaks that occur in the same chromatid by nonhomologous end-joining
• D) misalignment of homologous chromosomes at repetitive sequences followed by crossing-over
• E) a mutagen that introduces point mutations
Answer: D) misalignment of homologous chromosomes at repetitive sequences followed by crossing-over
Question: Which are possible results of an intragenic inversion (an inversion contained within a gene)?
Answer Options:
• A) The order of genes along the chromosome may be different than normal.
• B) A normal protein may be produced.
• C) Some of the gene’s DNA sequences will be adjacent to DNA sequences to which they are not normally adjacent.
• D) All of the gene’s A, C, G, and T bases remain in the same order as normal.
Answer: C) Some of the gene’s DNA sequences will be adjacent to DNA sequences to which they are not normally adjacent.
Question: When a crossover occurs within the inversion loop of a pericentric inversion, each recombinant chromatid will have
Answer Options:
• A) a dicentric bridge.
• B) a duplication of some genes in the inverted region.
• C) one copy of each gene, with some genes in a different order than normal.
• D) a deletion of some genes in the inverted region.
• E) one copy of each gene in the normal order.
Answer: B) a duplication of some genes in the inverted region.