Leptin is a hormone released by:
a. adipose tissue.
b. the stomach.
c. the large intestine.
d. chylomicrons.
e. the liver
a
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Which of the following would be most effective and practical for routine home disinfection of a kitchen sponge between uses?
A. 70% Isopropyl alcohol B. Hydrogen peroxide C. Chlorine bleach D. Iodophor
Examples of nonpolar signal molecules include ____
a. epinephrine b. insulin c. estrogen and testosterone d. growth factors e. neurotransmitters
The sporophyte stage of red algae produces spores that are shed into the water. What is the advantage of shedding spores into the water?
What will be an ideal response?
DNA helicase inhibitors are well studied as potential drug targets. What would you expect to see if DNA helicase activity is inhibited?
A) The replisome complex would not assemble on the oriC region. B) The DNA cannot bend, so hydrogen bonds in the 13-mer region of oriC remain intact. C) Helicase catalyzes ATP hydrolysis and DNA strands separation, so the helix cannot be unwound and strands will not separate. D) Helicase carries the SSB protein to the open region of DNA, so hydrolysis and strand separation will not occur. E) Helicase prevents reannealing of the separated strands, so strands would quickly reanneal and DNA replication cannot proceed.