Thyroid hormone is actually _____
a. a signal steroid hormone working alone
b. the triiodothyronine and thyroxine molecules working together
c. the estrogen and testosterone hormones working together
d. TRH and any other hormone working together
e. a second messenger or a steroid working alone
ANSWER: b
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When the result of two hormones working together is greater than that of either working alone, we say that they work ________
Fill in the blank(s) with correct word
Assuming no crossing over between the gene in question and the centromere, when do alleles segregate during meiosis?
A) anaphase I B) interphase C) anaphase II D) prophase II E) prophase I
The sum total of all chemical reactions occurring in a cell is called
A. metabolism. B. catabolism. C. anabolism. D. None of the choices are correct.
The conversion of PGAL to pyruvate is
accompanied by a. anaerobic respiration. b. photophosphorylation. c. the electron transfer chain. d. substrate-level phosphorylation. e. the Krebs cycle.