Which molecule is synthesized as a copy of a gene on the DNA template strand?
A. Ribosomal RNA
B. Messenger RNA
C. Transfer RNA
D. Primer RNA
E. Ribozymes
Answer: B. Messenger RNA
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Rubbing a substance on uncoated paper should reveal if it contains
a. lipid. b. carbohydrate. c. protein. d. sugar.
During his trip on the Beagle, Darwin found that ________
A) plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found B) plants and animals living on a continent seemed more closely related to each other than to plants and animals living in similar regions on other continents C) fossils found on a particular continent were clearly not related to the plants and animals living on that continent today D) plants and animals were similar on every continent and in every type of region
In good muscle tone, how many motor units are contracted?
A. some B. all C. none D. 5-10% of the motor units E. 10-15% of the motor units
Single-celled eukaryotes lacking a cell wall are
A. protozoa. B. fungi. C. algae. D. insects. E. water molds.