If you have a double-stranded synthetic piece of DNA that you want to attach to a PCR product, which enzyme would be used to join together the two molecules?
A. DNA ligase
B. DNA polymerase
C. taq DNA polymerase
D. reverse transcriptase
E. restriction enzyme
Answer: A
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Studies of rapidly dividing embryonic animal cells revealed:
A. a cyclic production of certain proteins in sync with the cell cycle. B. a cyclic activation of protein kinases in sync with the cell cycle. C. the rapid production of cyclin proteins is trailed by an activation of CDK enzymes. D. inhibition of protein production blocks mitosis. E. All of these choices are correct.
Because of its association with tools, the earliest human was called ________ meaning "handy man."
A. Cro-Magnon B. Homo sapiens C. Homo habilis D. Neanderthal E. Homo erectus
Each nucleotide is composed of
A. one phosphate, two nitrogenous bases, one sugar. B. one phosphate, one nitrogenous base, two sugars. C. two phosphates, one nitrogenous base, one sugar. D. two phosphates, one nitrogenous base, two sugars. E. one phosphate, one nitrogenous base, one sugar.
The chromatin structure in eukaryotic cells is much more complicated than that observed in prokaryotic cells. This is thought to be the reason that DNA replication occurs much faster in prokaryotes. How much faster is it?
(a) 2× (b) 5× (c) 10× (d) 100×