Small regulatory RNAs are known to be:
A. bound by Drosha in the cytoplasm.
B. recognized by DGCR8 in the nucleus.
C. cleaved by Dicer in the nucleus.
D. transported to the nuclease as fully processed miRNA.
B
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A defect in the HoxA-3 would most likely result in:
A. defects of the thyroid. B. defects of the limbs. C. an enlarged heart. D. defects of the lungs. E. abnormal positioning of the kidneys.
The binding of a plant hormone to its receptor
typically induces
a. an increase in membrane permeability. b. an enzyme-substrate cascade. c. an inhibition of protein synthesis. d. a change in gene expression. e. increased DNA replication activity
Virtually all chemical changes that take place in cells require ________, molecules that greatly increase the rate at which a chemical reaction occurs.
A) proteins B) DNAs C) Enzymes D) carbohydrates E) emzymes
Which of the following is an active enzyme?
A) apoenzyme B) cofactor C) coenzyme D) holoenzyme E) subtrate