Sequence-tagged sites (STS) are used to assemble DNA maps from a given species. STSs are useful in this regard because
A. they generate DNA fragments of a reasonable size for mapping.
B. they are only found in genes, not in noncoding DNA.
C. each STS is found many times within the genome.
D. they provide a way to order DNA fragments.
Answer: D
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The female genetic ancestor of all living humans:
A. lived in Africa only 10,000 years ago. B. was the only living female of her tribe. C. was identified using haplotypes on the X chromosome. D. was the only female of her tribe to have children. E. was the only female whose mitochondrial DNA has been inherited in the modern human lineage.
Which of the following events represses the expression of the bacteriophage ? cI gene?
A. activation of PRE by cII protein B. Cro protein binding to the OR3 operator C. multiple viral particles infecting a single cell D. cIII protein protecting cII from proteolysis
Which of the following is true of connective tissue?
1.It can detect stimuli. 2.It is responsible for homeostasis of the body. 3.It is under voluntary control. 4.It consist of cells in an abundant extracellular matrix.
Which of the enzyme-substrate pairings is not correct?
A. lipase-fat B. amylase-starch C. pepsin-protein D. nuclease-DNA E. trypsin-carbohydrates