Radiometric dating works best with
a. sedimentary rocks.
b. limestone.
c. metamorphic rock.
d. volcanic rocks.
e. meteorites.
D
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In a branched pathway with many end products, an abundance of one of the end products will usually inhibit
A. the first committed step in the branch of the pathway leading to the production of that particular product. B. the last step before the branch leading to the production of that particular end product. C. the last step in the production of that particular product. D. the first step in the set of pathways.
Which of the following is true about haplotypes?
A. Defining a haplotype requires the identification of simple-sequence repeats (SSR) and long repetitive sequences in the human population from multiple individuals. B. Single nucleotide polymorphisms (SNP) used to define the haplotype must be very close together on the chromosome. C. Mitochondrial haplotypes are less stable because mitochondrial DNA recombines at a high frequency. D. Haplotypes of the Y chromosome are not useful because only males have them. E. Haplotypes can be used as markers to trace human migration.
What is the term for crosses between parents that differ in only one trait?
A) Testcrosses B) Cross fertilize C) Monohybrid crosses D) Dihybrid crosses E) Reciprocal crosses
Which phase of microtubule polymerization in vitro would be affected most by adding short microtubules to unpolymerized GTP-tubulin?
A) lag phase B) elongation phase C) addition of tubulin dimers to microtubule (+) ends at the plateau phase D) addition of tubulin dimers to microtubule (?) ends at the plateau phase E) treadmilling