Question:
Answer: b. development of farm machinery that more efficiently harvests crops
Question: When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cycles. How many cycles of heating and cooling would be necessary to produce 16 times the original quantity of DNA?
a. 16
b. 2
c. 4
d. 6
e. 8
Answer: c. 4
Question:
Answer: c. a rat with rabbit hemoglobin genes
Question:
Answer: a. using CRISPR to find and cut a specific sequence of bacterial DNA
Question:
Answer: c. production of vitamin A-enriched “golden rice”
Question:
Answer: b. Genetically modified foods are unnatural.
Question: Some athletes illegally use recombinant human ___________ to improve their athletic performance because it increases the oxygen-carrying capacity of the blood.
a. insulin
b. stem cells
c. erythropoietin (EPO)
d. growth hormone (HGH)
e. red blood cells
Answer: c. erythropoietin (EPO)
Question: The technique in which a non-functioning gene is replaced by a functioning gene in somatic cells is called gene:
a.replacement.
b. medicine.
c. fixing.
d. therapy.
e. alteration.
Answer: d. therapy
Question:
Answer: c. because the egg cell has only a haploid complement of genes, whereas the mammary gland cell has a diploid complement
Question:
Answer: d. presence of fragments of DNA with variable lengths.