Which hormone is secreted by the pancreas to lower high blood glucose levels?
A. adrenaline
B. insulin
C. glycogen
D. glucagon
E. antidiruetic hormone
Answer: B
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An allosteric inhibitor
A) increases the rate of substrate binding. B) binds and activates the high-affinity state of the enzymes. C) is identical to the active site. D) binds at the regulatory site. E) is converted to an activator by the enzyme.
Transcription is terminated in prokaryotes by ____
a. generation of a stop codon b. transcription of an mRNA terminator sequence c. splicing introns out and pasting exons together d. generation of a guanine cap e. generation of a poly-A tail
What role do calcium ions play in cell signal propagation?
a. kinases b. phosphorylases c. secondary messengers d. membrane transfer
how does fat and water-soluble vitamins differ?
What will be an ideal response?