Which of the following molecules provides the greatest amount of energy per gram of mass when metabolized?
A. carbohydrate
B. nucleic acid
C. protein
D. lipid
Answer: D. lipid
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The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858
A. cytosine. B. uracil. C. adenine. D. thymine. E. guanine.
Which of the following is true of bacterial translation termination?
A. The ribosome continues to synthesize protein until it reaches the 3' end of the mRNA. B. Termination requires the degradation of the ribosome. C. Termination is signaled by the presence of a stop codon in the mRNA.
Unsaturated fats are considered healthier than saturated fats in the human diet
Indicate whether the statement is true or false.
Which of these provides the selection pressure maintaining sexual reproduction, according to the Red Queen hypothesis?
A. Sexual populations have only half the fitness of asexual populations. B. Females are able to choose males with superior genes. C. Pathogens of the sexual organism evolve to overcome the organism's defenses. D. Strains with different beneficial mutations are able to come together during recombination. E. Stabilizing selection maintains a 50:50 sex ratio.