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Ch. 20 - DNA Tools and Biotechnology

Chapter 20, Problem 3

Plants are more readily manipulated by genetic engineering than are animals because a. plant genes do not contain introns. b. more vectors are available for transferring recombinant DNA into plant cells. c. a somatic plant cell can often give rise to a complete plant. d. plant cells have larger nuclei.

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Hello everyone here. We have a question asking why is it more difficult to genetically manipulate animal genes than plant genes in animal genes? Somatic cells will form different body parts or organs and then plant genes. Somatic cells produce an entire plant. So our answer choices are A because a somatic cell will form different body parts or organs in animals. That is correct. B because animals have more genes. That is incorrect. See because animals have more entrance. That is incorrect. Indeed, because animals have larger nuclei. That is incorrect. So our answer here is A because a somatic cell will form different body parts or organs. And animals, thank you for watching. Bye!
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In DNA technology, the term vector can refer to a. the enzyme that cuts DNA into restriction fragments. b. the sticky end of a DNA fragment. c. a SNP marker. d. a plasmid used to transfer DNA into a living cell.

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A paleontologist has recovered a bit of tissue from the 400-year-old preserved skin of an extinct dodo (a bird). To compare a specific region of the DNA from a sample with DNA from living birds, which of the following would be most useful for increasing the amount of dodo DNA available for testing? a. SNP analysis b. polymerase chain reaction (PCR) c. electroporation d. gel electrophoresis

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DNA technology has many medical applications. Which of the following is not done routinely at present? a. production of hormones for treating diabetes and dwarfism b. analysis of gene expression for more informed cancer treatments c. gene editing by the CRISPR-Cas9 system in viable human embryos to correct genetic diseases d. prenatal identification of genetic disease alleles
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Which of the following is not true of cDNA produced using human brain tissue as the starting material? a. It can be amplified by the polymerase chain reaction. b. It was produced from pre-mRNA using reverse transcriptase. c. It can be labeled and used as a probe to detect genes expressed in the brain. d. It lacks the introns of the pre-mRNA.

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