Which current carries warm water northward in the western Atlantic ocean?
1.Canary current
2.Caribbean current
3.Gulf Stream
4.North Atlantic current
3
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In eukaryotes, translation takes place
A. on the plasma membrane. B. inside the nucleus. C. on ribosomes. D. on the nuclear membrane. E. on spliceosomes.
Outline the three stages involved in the transcription of a DNA molecule
What will be an ideal response?
Within six months of effectively using methicillin to treat S. aureus infections in a community, all new infections were caused by MRSA. How can this result best be explained?
A. The drug caused the S. aureus DNA to change. B. Some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency. C. In response to the drug, S. aureus began making drug-resistant versions of the protein targeted by the drug. D. A patient must have become infected with MRSA from another community. E. S. aureus can resist vaccines.
Two copies of the same gene on a single chromosome would indicate a(n) ________ had occurred.
a. deletion b. duplication c. inversion d. translocation