Which of the Following Cannot Be Found in a One-Group,pretest/posttest
What is the most favourable characteristic of retroviruses that makes them useful in gene therapy applications?
A) Retroviruses have an RNA genome.
B) Retroviruses possess reverse transcriptase.
C) DNA copies of retroviral genomes become integrated into the genome of the infected cell.
D) Retroviruses mutate often.
Why might using retroviral vectors for gene therapy increase the patient's risk of developing cancer?
A) Retroviral vectors may introduce proteins from the virus.
B) Retroviral vectors do not express the genes that were introduced into a patient's cells.
C) Retroviral vectors do not integrate their recombinant DNA into the patient's genome.
D) Retroviral vectors integrate recombinant DNA into the genome in ways that may misregulate the expression of genes at or near the site of integration.
In the form of gene therapy used successfully for severe combined immunodeficiency syndrome, SCID-X1, how is the genetic engineering of human cells achieved?
A) by injecting engineered viruses into the patient's bloodstream
B) by injecting engineered viruses into the patient's bone marrow
C) by treating a relative's cultured bone marrow cells with genetically engineered viruses and then injecting these cells into the patient's bone marrow
D) by isolating the patient's bone marrow cells, infecting them with genetically engineered viruses, and injecting them back into the patient's bone marrow
One predicted aspect of climate change is that climates, including precipitation and temperature, over most of Earth will become more variable. Which of the following is a good strategy for genetically engineering crops if this is true?
A) Use only plant crops that are genetically engineered.
B) Genetically engineer most crops to withstand very long droughts.
C) Genetically engineer several genotypes within single crop types.
D) Genetically engineer the fastest growing crops possible.