One day during the summer you and some friends make ice cream using an electric ice cream maker. To get the ice cream to form, a mixture of salt and ice is packed around the ice cream maker. A few days later you notice a yellow circle of dead grass where the ice cream maker had been placed. You hypothesize that some of the salt and ice mixture spilled onto the grass and ___
A. froze the grass
B. was isosmotic to the grass cells causing the yellow circle of dead grass
C. was hyperosmotic to the grass cells causing the yellow circle of dead grass
D. was hypoosmotic to the grass cells causing the yellow circle of dead grass
C
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Transcription is defined as:
A. the production of a strand of RNA with a sequence identical to the DNA template. B. the production of a strand of DNA with a sequence identical to the RNA template. C. the production of an exact complementary strand of RNA on a DNA template. D. the production of an exact complementary strand of DNA on a RNA template. E. the production of an exact complementary strand of RNA on a RNA template.
In obesity studies in mice, the binding of leptin activates the leptin receptor and initiates changes in ____ in the hypothalamus
a. nucleotide sequences b. cell membranes c. mitochondria d. fat storage e. gene expression
In addition to S. aureus, impetigo may also involve
A. M. luteus. B. S. pyogenes. C. S. epidermidis. D. Pseudomonas spp.
The DNA molecule could be compared to a
a. hairpin. b. ladder. c. key. d. globular mass. e. flat plate.