During PCR, heating of DNA is required to
A) promote attachment of nucleotides to the template.
B) allow DNA ligases to bind fragments together.
C) unwind double-stranded DNA.
D) attach the primer to the template DNA.
E) attach a stop codon.
C
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The primary structure of a protein is directly associated with ______
A. regular repeating shapes, such as beta-sheets B. the three-dimensional shape of the protein C. the linear sequence of the amino acids D. the interaction of two or more peptide chains
Which of the following statements is not true of a benign tumor?
1.It grows slowly.
2.It expands into surrounding tissue.
3.It does not spread via the bloodstream or lymphatic system.
4.None of the choices; all are true.
Mitochondrial DNA is inherited by means of
a. Mendelian genetics. b. random assortment. c. paternal transmission. d. maternal transmission.
Of all the species that have ever lived on Earth, how many have gone extinct?
A. Less than 1% B. About 10% C. About 25% D. About 75% E. About 99%