In vertebrates, how does the mechanism that stimulates hair cells differ from the mechanism used by rods and cones?
What will be an ideal response?
Sound information is picked up by hair cells designed to translate a mechanical stimulus (rubbing against a vibrating membrane) into a nerve impulse. Rods and cones are designed so that the receipt of a light photon changes the chemical structure of a pigment, which changes the chemical structure of a membrane protein, producing a membrane change that initiates a nerve impulse.
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Which of the following is not part of a yeast artificial chromosome (YAC)?
A. a CEN sequence B. an ARS C. a selectable marker D. the F factor
During exercise, the blood returning to a person's heart contains hemoglobin that is about ______ saturated.
A. 3% B. 22% C. 35% D. 75% E. 97%
The functions of the corpus luteum include all of the following except ________
A) maintenance of the endometrium B) secretion of follicle-stimulating hormone (FSH) C) secretion of progesterone D) secretion of estrogen
One function of sno-RNAs is to process pre-rRNA molecules in the mitochondrion
__________________ Indicate whether the statement is true or false.