Which of the following statements is FALSE?
A) DNA polymerase joins nucleotides in one direction (5' to 3') only.
B) The leading strand of DNA is made continuously.
C) The lagging strand of DNA is started by an RNA primer.
D) DNA replication proceeds in only one direction around the bacterial chromosome.
E) Multiple replication forks are possible on a bacterial chromosome.
D
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An amino acid contains all of the following except a/n ________.
A. variable R group B. carboxyl group C. ? carbon D. phosphate E. amino group
The figure above represents
a. a single chromosome b. two chromosomes in metaphase plate. c. an original chromosome with a duplicate. d. the entire genome of the organism. e. none of these.
Independent assortment of homologous chromosomes occurs at
A. anaphase I. B. anaphase II. C. metaphase I. D. interphase. E. prophase I.
The fact that calico cats are only female supports the theory of
A) two X chromosomes being required for coat color in cats. B) mutations in all genes on one X chromosome. C) testosterone inactivation of Y-chromosome genes. D) X-chromosome inactivation and Barr bodies in females.