Which of the following is nota mechanism for regulating gene expression after the mature RNA transcript is produced?
A. gene silencing by miRNAs
B. inhibition of translation initiation
C. blockage of the promoter by a repressor protein
D. protein degradation
C
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A ________, such as UDPG, is often attached to many sugars during synthesis.
What will be an ideal response?
Which letter in the figure above represents the limnetic zone?
a. A b. B c. C d. D e. E
Which of the following statements is false?
a. The greatest amount of photosynthesis takes place in the palisade mesophyll. b. There are more stomata on the upper epidermis of most leaves than on the lower epidermis. c. The palisade mesophyll is more densely packed than the spongy mesophyll. d. The surface area of the root system is greater than that of the shoot system. e. Leaf hairs are extensions of single epidermal cells.
Hydropower can have an affect on
a. water pollution. b. soil erosion. c. deforestation. d. river and ocean life. e. mineral leaching.