Which of the following isnot an additional role for nucleosides and nucleotides?
A. primary energy currency of the cell (ATP)
B. electron carrier (NAD+)
C. methyl group donor (S-adenosylmethionine)
D. regulatory molecule (cAMP)
E. catalyst for splicing reactions (dUTP)
E
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Which of the following arthropods is the vector of Lyme disease?
A) flea B) mite C) mosquito D) tick
The ovaries are regulated by the____
a. anterior pituitary b. posterior pituitary c. hypothalamus d. presence of environmental estrogens e. gonadal hormones
Recycle
What will be an ideal response?
What is the difference between Ras and the G proteins bound to G protein-coupled receptors (GPCRs)?
A. Ras is a second messenger, and the G proteins bound to GPCRs are not second messengers. B. Ras is an enzyme, and the G proteins bound to GPCRs are not enzymes. C. Ras can activate different effector molecules, and the G proteins bound to GPCRs cannot activate different effector molecules. D. Ras is a small G protein, and the G proteins bound to GPCRs are not small G proteins.