Which of the following has NOT been performed using CRISPR genome editing?
a. Excision of the HIV genome from the genome of human cells in vitro.
b. Insertion of new DNA into specific cut sites.
c. Gene deletion at specific cut sites.
d. The production of recombinant human somatotropin.
Answer: D
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Maurice Wilkins and Rosalind Franklin obtained X-ray diffraction photographs that indicted that DNA has a ____________________ shape with a constant diameter
Fill in the blank(s) with correct word
Species richness is ____ when any one species enjoys a position of dominance
a. no different b. more dense c. reduced d. increased e. complex
Why was the determination of the actual sequence of the human genome considered to be descriptive science?
A. It involved inductive reasoning. B. It did not involve deductive reasoning. C. It did not involve hypothesis-driven research. D. It involved hypothesis-driven research.
What is the main idea behind the model of a molecular clock?
a. that neutral mutations accumulate at a steady rate b. that certain traits are under the pressure of natural selection c. that segments of DNA can be compared with segments of RNA d. that phenotypes, not genotypes, are affected by natural selection