Which molecule is a six carbon compound?
a. PEP
b. PGAL
c. fructose-1, 6-biphosphate
d. pyruvate
e. phosphoglycerate (PGA)
ANSWER: c
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Twenty-five years ago, when Oshima and colleagues discovered that a mutation in the GAL4 gene led to the inability to synthesize all five enzymes required for galactose catabolism (breakdown), they couldn't be blamed for wanting to apply a bacterial model
to explain this finding. What they expected, but did not find, was _____. A) that all five genes constitute an operon B) five widely separated genes, each containing a GAL4-binding site in its regulatory region C) that chromatin decondensation played an important role in regulating the genes of galactose catabolism D) that transcription is important in regulating the genes of galactose catabolism
The ________ projection illustrates saccharides as linear, whereas the ________ projection suggests the spatial relationships of saccharides.
Fill in the blank(s) with the appropriate word(s).
In eukaryotic cells, where does the citric acid cycle occur?
a. In the mitochondria b. In the cytoplasm c. In the plasma membrane d. In the central vacuole
Which is incorrect about restriction enzymes?
A. They were discovered by Werner Arber and Hamilton Smith in 1960s. B. They are found in bacteria and eukaryotes. C. They are key tools that make genetic engineering possible. D. A specific enzyme will always cut at the same sequence.