Which of the following is most closely identical to the formation of twins?
A) therapeutic cloning
B) use of adult stem cells
C) embryo transfer
D) cell cloning
E) organismal cloning
Multigene families are
A) equivalent to the operons of prokaryotes.
B) usually clustered at telomeres.
C) identical or similar genes that have evolved by gene duplication.
D) groups of enhancers that control transcription.
E) sets of genes that are coordinately controlled.
What is the function of reverse transcriptase in retroviruses?
A) It translates viral RNA into proteins.
B) It uses viral RNA as a template for DNA synthesis.
C) It hydrolyzes the host cell's DNA.
D) It uses viral RAN as a template for making complementary RNA strands.
E) It converts host cell RNA into viral DNA.
For mapping studies of genomes, most of which were far along before 2000, the 3-stage method was often used. Which is the usual order in which the stages were performed, assuming some overlap of the three?
A) linkage map, physical map, sequencing of fragments
B) sequencing of entire genome, physical map, genetic map
C) genetic map, sequencing of fragments, physical map
D) physical map, linkage map, sequencing
E) cytogenic linkage, sequencing, physical map
5 Multiple Choice Questions
5 True/False Questions
A researcher needs to clone a sequence of part of a eukaryotic genome in order to express the sequence and to modify the polypeptide product. She would be able to satisfy these requirements by using which of the following vectors?
A) BAC to accommodate the size of the sequence
B) a modified bacteriophage
C) a YAC with appropriate cellular enzymes
D) a human chromosome
E) a bacterial plasmid → C
Which of the following is a representation of gene density?
A) Humans have 27,000 bp in introns.
B) C. elegans has 20,000 genes.
C) Humans have 2,900 Mb per genome.
D) Humans have 25,000 genes in 2,900 Mb.
E) Fritillaria has a genome 40 times the size of a human. → E
What is it about short tandem repeat DNA that makes it useful for DNA fingerprinting?
A) The sequence variation is acted upon differently by natural selection of different environments.
B) Every racial and ethnic group has inherited different short tandem repeats.
C) The number of repeats varies widely from person to person or animal to animal.
D) The sequence of DNA that is repeated varies significantly from individual to individual. → C
Emerging viruses arise by
A) the spread of existing viruses to new host species.
B) mutation of existing viruses.
C) the spread of existing viruses more widely within their host species.
D) all of the above.
E) none of the above. → D
Bacteria that do not take up any plasmids would grow on which media?
A) the nutrient broth and the tetracycline broth.
B) the nutrient broth and the ampicillin broth.
C) the nutrient broth only.
E) the tetracycline broth and the ampicillin broth. → E