Which neurotransmitter is involved in both Parkinson's disease and ADD?
A) acetylcholine
B) dopamine
C) serotonin
D) GABA
B
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Cyclic AMP is a common second messenger, often associated with ____ hormones
a. peptide b. steroid c. protein d. fatty acid e. polysaccharide
During a workout session, you may begin to experience a burning sensation in a muscle group that you are targeting with your choice of exercises. This is most likely due to anaerobic metabolism in that muscle, generating ________
Fill in the blank(s) with correct word
A new operon is discovered in bacteria. Transcription of the genes in this operon is blocked by the binding of a protein
to DNA sequences upstream of the operon. This is an example of ____ control. a. positive b. negative c. constitutive d. posttranscriptional e. inducible
A ________ cycle is a cyclic path that involves both biological and chemical processes of an ecosystem.
A. hydrological B. biogeochemical C. complete D. complementary