Which of the following is not true of hydrocarbons?
A) Octane is a hydrocarbon.
B) Hydrocarbons are insoluble in water.
C) Many hydrocarbons are used in living systems.
D) Only hydrogen atoms are used to complete the valence requirements of carbon.
E) Phospholipids have hydrocarbon tails.
C) Many hydrocarbons are used in living systems.
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Which of the following is most correct regarding genes, DNA, and protein?
A) A gene is a section of DNA whose sequence encodes a particular protein, which is composed of amino acids. B) A gene is a section of a chromosomal DNA composed of many amino acids. C) DNA is composed of many genes, which are formed from amino acid sequences. D) DNA is composed of amino acids, which encode the protein and genotype.
This occurs when insertions or deletions cause the ribosome to read the wrong sets of three nucleotides.
A. point mutation B. frameshift C. translocation D. transcription
A culture medium consisting of agar, peptone, and beef heart is a
A) chemically defined medium. B) complex medium. C) selective medium. D) differential medium. E) reducing medium.
How are populations involved in speciation?
A. interbreeding with other populations must occur B. large populations must decrease in number C. population gene pools must become isolated D. small populations must increase in number