Receptors for ________ hormones are located on the plasma membrane and affect target cells by _________
A. amine; activating protein kinase enzymes
B. steroid; activating protein kinase enzymes
C. peptide; forming hormone-receptor
complexes that activate or inhibit gene
expression
D. steroid; forming hormone-receptor
complexes that activate or inhibit gene
expression
E. amine; forming hormone-receptor
complexes that activate or inhibit gene
expression
A
You might also like to view...
Homeotic genes encode transcription factor proteins that bind DNA. The DNA-binding domain of homeotic proteins is called a ____ , and is a highly conserved region in many homeotic proteins
Fill in the blank with the appropriate word.
Which of the following is generally true of eukaryotic promoters?
A. Regulatory regions lie within 200 base pairs of the promoter. B. The more complex the organism, the more complex its promoters. C. Promoters are under the control of a single regulatory sequence. D. RNA polymerase II exhibits high intrinsic affinity for promoter sequences.
In the mammalian eye, the lens focuses an image ____
a. across the entire surface of the retina b. primarily on the fovea c. on the rods only d. slightly in front of the retina e. it varies based on where you are looking
Which of the following lymphocytes secretes large quantities of antibodies?
A) B cells B) T cells C) Natural killer cells D) All of the above