There are no direct-to-consumer genetic tests available that screen for breast cancer susceptibility
a. True
b. False
Indicate whether the statement is true or false
False
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When the replication machinery encounters a single-strand break, the replication fork collapses resulting in a double-strand break. Which of the following would be the fourth step in repairing this damage?
A. The 3' single-strand overhang invades the intact portion of the chromosome, pairs with its complementary strand, and displaces the other. B. Once the strand invasion is complete, branched migration occurs. C. The broken ends are processed, with the 5' ending strand selectively degraded to create 3' overhangs. D. Branch migration creates Holliday intermediates that are resolved by the enzyme resolvase. E. Resolution of the Holliday intermediate is followed by ligation and replication is restarted.
How much more powerful than the asteroid
impact that created the Barringer Crater in Arizona was the asteroid impact that created the crater off the coast of the Yucatan Peninsula?
a. 10 million times b. 20 million times c. 30 million times d. 40 million times e. 50 million times
Which hemoglobin genotype has the highest fitness in an area of low malaria infection?
a. HbAA b. HbAS c. HbSS d. All are equal
ATG is a DNA triplet that codes for an amino acid. Which mRNA codon will pair with the ATG triplet?
A. ATG B. GTU C. TAC D. UAC