Which of the following events takes place in the electron transport chain?
A) the breakdown of glucose into two pyruvate molecules
B) the breakdown of an acetyl group to carbon dioxide
C) the extraction of energy from high-energy electrons remaining from glycolysis and the citric acid cycle
D) substrate-level phosphorylation
Answer: C
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After a restriction enzyme cuts DNA into fragments and the fragments pair with complementary bases, the enzyme ____________________ is used to seal the gaps in the phosphate backbone
Fill in the blank(s) with correct word
In chemistry, what is a base?
a. A base is any substance that increases the hydrogen ion (H+) concentration in a solution. b. A base provides either hydrogen ions (H+) or positively charged ions that combine with hydroxide ions (OH-). c. A base provides either hydroxide ions (OH-) or negatively charged ions that combine with hydrogen ions (H+). d. A base is any substance that increases the hydroxide ion (OH-) concentration in a solute.
Allelochemicals are active in preventing
a. herbivore feeding. b. germination of plant competitors. c. infection by pathogens. d. all of the above.
The first step in the replication of DNA is catalyzed by _____.
Fill in the blank(s) with the appropriate word(s).