What is NOT true regarding the use of yeast artificial chromosomes (YACs) for cloning?
a. They are circular vectors.
b. Large fragments of DNA can be inserted into them.
c. They have features to allow them to replicate and segregate like normal eukaryotic chromosomes.
d. They contain a gene for selection.
Answer: A
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Ampicillin, like penicillin, must be administered by injection because it is rapidly degraded in the stomach and cannot, therefore, be given orally.
Answer the following statement true (T) or false (F)
For biological clocks related to seasons, the critical input is day length or ____
Fill in the blank with the appropriate word.
Eggs can contain bacteria such as Salmonella. explain why cooking eggs make them safe to eat.
What will be an ideal response?
There are eight total steps in the citric acid cycle, and pyruvate is completely oxidized in steps three
and four. What is the purpose of the last four steps that occur in the cycle?
a. to replenish the supplies of NAD+ and FAD b. to break down glucose into a three-carbon molecule c. to regenerate oxaloacetate to attach another acetate molecule d. to produce ATP by substrate-level phosphorylation e. to produce ATP by oxidative phosphorylation