Which molecule is a first messenger but not a second messenger?
a. G protein
b. cyclic AMP
c. acetylcholine
d. protein kinase
e. adenylyl cyclase
c
Biology & Microbiology
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What do the letters D-N-A stand for?
A. Dioxyribonuclear acid B. Deoxyribonucleic acid C. Deoxyrobonuclear acid D. Dioxyribonucleic acid
Biology & Microbiology
How many different classes of neurons are
involved in most nervous systems?
a. 1 b. 2 c. 3 d. 4 e. 5
Biology & Microbiology
Multiple effects of a single gene is
a. expressivity. b. penetrance. c. codominance. d. pleiotropy. e. multiple alleles
Biology & Microbiology
Cattle egrets hitch a ride on domestic cows and eat insects that are stirred up by their activity. What term describes this relationship?
A) commensalism B) competition C) predation D) parasitism
Biology & Microbiology