An example of a non-enzyme containing receptor is:
A. Prolactin receptor
B. Platelet-derived growth factor receptor
C. Insulin receptor
D. Epidermal growth factor receptor
Ans: A. Prolactin receptor
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Which of the following is not something that causes guard cells to close?
A. too little water in the leaf B. too much CO2 in the leaf C. presence of abscisic acid D. too little CO2 in the leaf E. too much water vapor outside the leaf
Which of the following is found most often for deuterostomes?
a. spiral, indeterminate cleavage b. radial, indeterminate cleavage c. spiral, determinate cleavage d. radial, determinate cleavage e. radial cleavage in juveniles, determinant cleavage in adults
Evidence suggesting that snakes evolved from ancestral lizards includes the fact that _____
a. some give live birth to their young b. some have bony remnants of hind limbs c. all have internal fertilization d. all have amniotic eggs e. some actually have legs
Which of the following carries amino acids to
ribosomes, where amino acids are linked into the primary structure of a polypeptide? a. mRNA b. tRNA c. hnRNA d. rRNA e. all of these