What type of macromolecule helps package DNA in eukaryotic chromosomes?
(a) lipids
(b) carbohydrates
(c) proteins
(d) RNA
(c)
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The highest tariff rates in U.S. history were the result of the
a. Reciprocal Trade Agreements Act of 1934. b. Hawley-Smoot Tariff of 1930. c. Tokyo Round of 1970. d. Uruguay Round of 1986.
Four the following statements are true about the mitochondrion. Which statement is false?
a. It has its own DNA. b. Its DNA has few noncoding regions between genes. c. It evolved from chloroplasts. d. It resembles bacteria in structure. e. It resembles bacteria in size.
Polyploidy may arise from the failure of chromosomes to separate during cell division or by the
fertilization of an egg by more than one sperm. _________________ Indicate whether the statement is true or false.
In order for the dissociation element (Ds) mutations in corn to be stable,
A) an Ac element must be present. B) an Ac element must not be present. C) the Ds must contain the gene for transposition. D) the DNA must not be replicated. E) None of these