Which of the following best describes the significance of the TATA box in eukaryotic promoters?
A) It is the recognition site for a specific transcription factor.
B) It sets the reading frame of the mRNA.
C) It is the recognition site for ribosomal binding.
D) Its significance has not yet been determined.
A
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In the Northern Hemisphere, seasonal variation in temperatures is caused mainly by ____
a. the Earth's elliptical orbit taking it closer to and farther away from the sun b. the Earth's tilt on its axis of 23.5
What contributes to muscle fatigue?
a. lactic acid buildup b. glycogen depletion c. both lactic acid buildup and glycogen depletion d. loss of nerve innervation e. stretching a muscle
Granulosa cells surround a:
a. primary oocyte. b. secondary oocyte. c. primary spermatocyte. d. secondary spermatocyte. e. Sertoli cell.
While cleaning out the attic, you find a packet of seeds that your grandmother gathered from her garden. You plant them outside, and some of them sprout. What was the condition of these germinating seeds while they were in the attic?
A) The endosperm cells were dead; the embryo cells were alive but inactive. B) They were dead, but the embryo cells revived in response to water. C) They were alive and very metabolically active. D) They were alive but dormant.