The portion of the DNA molecule that is not
translated and is a noncoding portion of DNA is
composed of
a. introns.
b. anticodons.
c. exons.
d. transcriptons.
e. exons and transcriptons.
Answer: a
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This polysaccharide is an important ECM component for the exoskeleton of many insects and shellfish.
A. proteoglycan B. collagen C. chitin D. laminin E. glycosaminoglycans
A soft drink manufacturer, notorious for making marketing claims that are deceptive but technically accurate, has released a new sports beverage. The advertisements for this beverage assert that it contains three grams of chlorophyll per bottle, which will give the user extra energy during exercise performed in direct sunlight. Naturally, you buy a bottle to test its ingredients, and you are able to verify that it does, in fact, contain three grams of plant-sourced chlorophyll. Have you finally caught the company in a lie?
a. Yes! Three grams of chlorophyll is insufficient to produce measurable amounts of energy. b. No; chlorophyll in leafy greens and sports drinks continues photosynthesis after ingestion. c. Yes! Sunlight will have no effect on the amount of energy derived from digested chlorophyll. d. Yes! Humans cannot metabolize the carbohydrates produced by photosynthesis.
Which color of light has the least important role in photosynthesis?
a. red b. green c. blue d. orange e. yellow
All of the following protect the skin and mucous membranes from infection EXCEPT
A) multiple layers of cells. B) tears. C) saliva. D) HCl. E) the "ciliary escalator."