What biological chemical is important in heredity of traits?
a. Carbohydrates
b. Nucleic acids
c. Lipids
d. Proteins
ANS: B
Nucleic acids are mostly made from four different elements?oxygen, carbon, nitrogen, and hydrogen.
This once again indicates the unity of all life on Earth. Information can be found in the section Living
Organisms Are Built from a Few Elements.
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Which of the following is the correct IUPAC name of a carboxylic acid which contains five carbon atoms?
A) 1-methyl-1-butanoic acid B) 1-methylbutanoic acid C) 2-methyl-1-butanoic acid D) 2-methylbutanoic acid
Which of the following notations corresponds to the fatty acid with the lowest melting point?
A) 18:0 B) 18:1 C) 18:2 D) 18:3
Which of the following radioisotopes can be used to monitor thyroid function?
A) C-14 B) H-3 C) I-131 D) P-32
Which of these coastal effects is NOT caused by heavy rain during a hurricane?
a. flooded streams b. landslides (from saturated slopes) c. drowned people d. contaminated groundwater e. large storm surges