Cancerous cells differ from noncancerous cells in that cancerous cells:a
have reduced levels of telomerase.
b. divide only 20 to 30 times.
c. have lost the ability to resist apoptosis.
d. can maintain telomere length as they divide.
e. lack telomeres.
D
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The use of recombinant DNA technology to produce commercial products is ______________. Fill in the blank(s) with the appropriate word(s)
Which of the following plates would have the highest percentage of bacteria that are expected to produce insulin?
(A) I only (B) III only (C) IV only (D I and III
Based on modern molecular phylogeny, which animal taxon has members with radial symmetry?
a. Ecdysozoa b. Deuterostomia c. Radiata d. Protostomia
In the late 1990s, what important discovery in genetics was made?
a. The three-dimensional structure of DNA was described, which showed how DNA might be replicated. b. The first recombinant DNA experiments were performed that started the biotechnology field. c. DNA sequencing methods were first discovered. d. Genes were found to be located on chromosomes. e. Tiny RNAs were discovered that play important roles in the regulation of gene expression.