A common second messenger molecule is
a. a steroid compound.
b. cyclic AMP.
c. ADP.
d. prostaglandin.
e. intermedin.
Answer: b
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In Mendel's crosses the starting plants are referred to as the P generation
1.True 2.False
Four of the five structures listed below belong to the
same sense. Select the exception. a. otolith b. vestibular apparatus c. semicircular canal d. cochlea e. saccule
Specific amino acids are attached to tRNA molecules by
A. hydrogen bonds. B. aminoacyl-tRNA synthetases. C. initiation factors. D. anticodons. E. deactivating enzymes.
Samantha gets into an elevator in a large skyscraper, and the doors close. She hears no noise, feels no vibration, and sees no movement, but she nevertheless knows that she is on her way up. What specific part of her ear is allowing her to know that she
is ascending? A) stapes B) organ of Corti C) saccule D) utricle