Which statement about gene therapy is false?
A) It has been used to treat some genetic disorders, such as severe combined immunodeficiency disease (SCID).
B) It works to treat diseases by inserting a functional gene into an individual's cells to replace a defective version.
C) It is performed on cells of the body, which ensures that a defective gene cannot be passed on to offspring.
D) It may cause difficulty regulating gene expression.
E) It is not totally effective because there are difficulties getting the functional gene into the target cells.
C) It is performed on cells of the body, which ensures that a defective gene cannot be passed on to offspring.
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A trait that is adaptive in one context and later turns out to have adaptive value in a different context is called ____
a. paedomorphic b. heterochronic c. allometric d. an exaptation e. endemic
All animal cells contain the same type and quantity of organelles?
a. true b. false
Taste buds that are more sensitive to sweet flavors than to others are located ________
A) on the tip of the tongue B) on the back of the tongue C) on the side of the tongue D) all over the tongue, as sensitivity to sweet is distributed throughout the tongue
Experimentally heating amino acids and exposing them to water resulted in ________
a. living cells b. protocells that could capture energy, concentrate materials, and replicate themselves c. denatured proteins d. proteins identical in sequence to some found in modern animals