Which of the following was determined by
Watson and Crick?
a. the amount of adenine in a DNA molecule
equals the amount of thymine
b. DNA is a double helix
c. DNA has a phosphate backbone
d. the sequence of DNA bases is different in
different organisms
e. none of these were determined by Watson
and Crick
E
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How is the structure of kinesin related to its function?
A) Kinesin has two intertwined polypeptides that make up the stalk and enable it to contract and shorten. B) Kinesin has a tail region that binds to vesicles and two heads that can attach to microtubules. C) The kinesin tail has an ATP binding site to fuel its activities. D) Kinesin has two heads to attach to the vesicle being moved and a tail region that attaches to microtubules.
Which is true regarding translation in bacteria?
A. The 70S ribosome is composed of a 20S and 50S subunit. B. Translation begins with formation of the 30S initiation complex. C. Translation ends when the Shine-Delgarno sequence is reached. D. All of the choices are correct.
A liquid that can dissolve other substances is
called a
a. compound. b. mixture. c. solvent. d. solute. e. solution
Smooth muscle
A) contracts when stretched. B) is under voluntary control. C) does not contain actin or myosin. D) produces rapid contractions.