Molecules made primarily of carbon and hydrogen are called hydrocarbons. How many hydrogen atoms are present in each of the following molecules? A hydrocarbon chain of five carbons joined to each other by single covalent bonds?
A. 6
B. 8
C. 10
D. 12
Answer D
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In which structure do fern spores form?
a. frond b. rhizome c. sorus d. rhizoid e. gametangium
Which enzyme is active in DNA replication?
A) DNA polymerase B) RNA polymerase C) reverse transcriptase D) aminoacyl-tRNA synthetase E) RNase
Respond to the following statements with reference to the five components of the gastrointestinal tract listed below.
A. Microbes in this organ help ruminants break down cellulose. B. Enzymatic digestion of proteins begins in this organ. C. Bile salts, bile pigments, cholesterol, and lecithin are stored by this organ. D. Chemical digestion of food is completed here. E. Short tubular projection of the large intestine. F.