Chapter 14: Q. 4 (page 367)
If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of C? a. 27 percent b. 30 percent c. 23 percent d. 54 percent
Option c is correct.
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The experiments by Hershey and Chase helped confirm that DNA was the hereditary material on the basis of the finding that: a. radioactive phage were found in the pellet b. radioactive cells were found in the supernatant c. radioactive sulfur was found inside the cell d. radioactive phosphorus was found in the cell
A scientist creates fruit fly larvae with a mutation that eliminates the exonuclease function of DNA pol III. Which prediction about the mutational load in the adult fruit flies is most likely to be correct?
a. The adults with the DNA pol III mutation will have significantly more mutations than average.
b. The adults with the DNA pol III mutation will have slightly more mutations than average.
c. The adults with the DNA pol III mutation will have the same number of mutations as average.
d. The adults with the DNA pol III mutation will have fewer mutations than average.
Which of the following components is not involved during the formation of the replication fork?
a. single-strand binding proteins
b. helicase
c. origin of replication
d. ligase
Imagine the Meselson and Stahl experiments had supported conservative replication instead of semiconservative replication. What results would you predict to observe after two rounds of replication? Be specific regarding per cent distributions of DNA incorporating 15N and 14N in the gradient.
DNA double helix does not have which of the following? a. antiparallel configuration b. complementary base pairing c. major and minor grooves d. uracil
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