DNA helicase and topoisomerase are similar insofar as they promote the unwinding and uncoiling of DNA.
Answer the following statement true (T) or false (F)
True
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Supertasters for the chemical PTC are ____ for the trait
a. homozygous dominant b. heterozygous c. homozygous recessive d. either homozygous dominant or homozygous recessive e. either homozygous dominant or heterozygous
What is the function of the ampr gene in a plasmid vector?
A) It provides several unique restriction enzyme recognition sites for opening up the plasmid. B) It allows a researcher to separate bacterial cells with a plasmid from those without a plasmid. C) It contains an origin for replication of the bacterial chromosome. D) It allows a researcher to distinguish plasmids with an insert from those without an insert. E) It is required for packing plasmid DNA into bacteriophage heads.
All EXCEPT which of the following is true of the
spinal cord? a. houses connections between sensory and motor neurons b. serves as a reflex center c. its gray matter serves as passageway for nerve tracts to brain d. is covered with meninges e. is enclosed by vertebrae
Which is a product from the first reaction of the citric acid cycle?
a. ATP b. NAD+ c. citrate d. phosphate e. acetyl-CoA