Complementary base pairs are held together by
A) disulfide bonds.
B) peptide bonds.
C) covalent bonds.
D) hydrogen bonds.
E) ionic bonds.
D
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In a chemical reaction, glyceraldehyde-3-phosphate + NAD+ yields 1,3-bisphosphoglycerate + NADH. In this reaction, what happened to NAD+?
A. It was oxidized to form NADH B. It was reduced to form NADH C. It was activated to form NADH D. it served as an enzyme to catalyze the reaction, and at the end of the reaction formed NADH Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about oxidation and reduction chemical reactions? What other information is related to the question? Choose Answer Do you have all the information needed to determine the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following sequences would be cleaved by a type II restriction endonuclease?
A) TTGCCGA AACGGCT B) GGGGGGG CCCCCCCC C) GTAATG CATTAC D) GAATTC CTTAAG
Radiometric dating
a. is based on the premise that each isotope decays at a constant rate. b. is unpredictable because changes in temperature and pressure alter the results. c. can be used to date sedimentary rock. d. has a large error factor. e. is used for dating only recent fossils.
The respiratory system is responsible for
A. oxygen entering the body and carbon dioxide leaving the body. B. the regulation of nutrient absorption. C. carbon dioxide entering the body and oxygen leaving the body. D. nitrogen leaving the bloodstream. E. methane formation.