Which of the following types of molecule is secreted by the human brain and acts as a natural pain killer?

1.catecholamine
2.endorphin
3.norepinephrine
4.serotonin


2

Biology & Microbiology

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Characters that have a continuous distribution, such as height, weight, and skin color, are called ____, and the

individual genes that control them are known as ____.

a. quantitative phenotypes; quantitative trait markers b. quantitative genotypes; quantitative trait loci c. quantitative traits; quantitative trait markers d. quantitative traits; quantitative trait loci e. quantitative markers; quantitative trait markers

Biology & Microbiology

Underground stems with fleshy leaves used for storage of water and food are known as:

a. tendrils. b. spines. c. bulbs. d. buds. e. stipules.

Biology & Microbiology

True or False: Often it is the final product of a biosynthetic pathway that acts as a corepressor molecule

a. TRUE b. FALSE

Biology & Microbiology

Which of the following antibiotics does NOT target peptidoglycan synthesis?

a. bacitracin b. penicillin c. vancomycin d. streptomycin

Biology & Microbiology