Maintenance of the uterine lining during pregnancy in mammals requires
A. LH.
B. estradiol.
C. FSH.
D. progesterone.
E. testosterone.
Answer: D
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Which is true about the RNA transcript?
A. It is formed using the DNA minus strand as a template. B. It has the same 5'-3' orientation as the DNA positive strand. C. It is made in short fragments that are then stitched together. D. The template starts at the promoter region. E. It is formed using the DNA minus strand as a template, it has the same 5'-3' orientation as the DNA positive strand, AND the template starts at the promoter region.
When ATP energizes biochemical reactions, it transfers its ________ to the molecule being made more reactive
a. outermost phosphorous atom b. outermost phosphate group c. ribose d. adenine
What is one drawbacks to using pheromones for communication?
a. They are effective only at night. b. They can only affect unrelated species. c. They are toxic to unrelated species. d. They require little energy for production. e. They transmit information slowly.
Suppose that two strains of E. coli—strain a (bio- met- leu+ thr+ thi+) and strain b (bio+ met+ leu- thr- thi-)—conjugate. If the two strains are grown on minimal medium, what is the most likely genotype of their offspring?
a. bio+ met- leu- thr- thi+ b. bio+ met+ leu+ thr+ thi+ c. bio+ met+ leu- thr- thi+ d. bio- met- leu- thr- thi+