Why was another nucleotide not added to the smallest fragment?
A) DNA polymerase became inactive after adding the last nucleotide.
B) The last nucleotide added does not have a 3? hydroxyl group.
C) The last nucleotide added does not have a 5? phosphate group.
D) The DNA strand reached a length where it cannot grow any longer.
E) DNA polymerase reached the end of the template.
B) The last nucleotide added does not have a 3? hydroxyl group.
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The critical tissue for producing a vasodilatory effect of acetylcholine in Robert Furchgott's experiments with rabbit aortas was the
A. endothelium. B. smooth muscle layer. C. elastic outer layer. D. pericardium. E. one-way valves.
Accommodation involves the ability to
a. change the sensitivity of the rods and cones by means of neurotransmitters. b. change the curvature of the cornea. c. change the thickness of the lens by contracting or relaxing certain muscles. d. adapt to large changes in light intensity. e. do all of these.
DNA ligase links two ____ DNA fragments by ____ bonds
a. complementary; hydrogen b. circular; covalent c. palindromic; covalent d. linear; covalent e. linear; hydrogen
Which of the following is a mismatched pair:
1. local infection - restricted to small area 2. viremia - viruses traveling in the blood 3. secondary infection - symptoms reoccur occasionally for years after an initial infection (ex. genital herpes) 4. acute infection: rapid onset of symptoms 5. focal infection: original location of spreading infection