8. In the Hershey and Chase was radiolabeled with *s experiment designed to dete

Question

8. In the Hershey and Chase was radiolabeled with *s experiment designed to determine the molecule of heredisy, what to determine a. in NA d. rRNA RNA e one of the choices is correct 9. The polarity of DNA synthesis is: 5 d. 25 10. X-ray data showed that the spacing between repeating units along the axis of the DNA helix is a. 2.0 angstroms b. 20 angstroms 34 angstroms d. 3.4 angstroms e. None of the above -form DNA spirals to the left and represents an unusual conformation a. A b. B c. D d. Y e. In 1944, Avery, MacLeod, and McCarty extended Griffith's experiments by showing th the transformation activity of the purified "transforming principle" was inactivated by 12. a. Protease b. RNase c. DNase d. ultracentrifugation e. b&

Explanation / Answer

1. The correct answer is option A. Hershey and Chase concluded that DNA, not protein, was the genetic material. They determined that a protective protein coat was formed around the bacteriophage, but that the internal DNA is what conferred its ability to produce progeny inside a bacterium.

2. The correct answer is option B. When DNA is synthesized, the 5 phosphate of one nucleotide is added to the 3 hydroxyl group of the growing DNA strand. The double-stranded has no polarity.

3. The correct answer is option C. The diameter of the B-DNA is 20 Angstroms, and the distance between base pairs is 3.4 Angstroms.

4. The correct answer is option B. In B-DNA, the most common double helical structure found in nature, the double helix is right-handed with about 10–10.5 base pairs per turn.

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