Which property of RNA makes some RNA molecules able to act as catalysts?
a. They are single-stranded molecules that can fold into very specific shapes.
b. They are single-stranded molecules that cannot fold into very specific shapes.
c. They are double-stranded molecules.
d. They are double-stranded molecules that can fold into very specific shapes.
Ans: a. They are single-stranded molecules that can fold into very specific shapes.
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Growth that results in an increase in the girth of a plant is referred to as:
a. horizontal growth. b. longitudinal growth. c. primary growth. d. radial growth. e. secondary growth
The polio viruses usually enter the body through
A. the oral route. B. contaminated blood. C. cuts in the skin. D. the respiratory route.
What can explain the phenomenon where the same genotype might give rise to different phenotypes?
A) pleiotropy B) codominance C) incomplete dominance D) complete dominance E) penetrance and expressivity
The spontaneous generation theory of disease was replaced by identifying microorganisms as the cause diseases
a. true b. false