What is the final electron acceptor in the electron transfer chain?
a. water
b. oxygen
c. ADP
d. FAD
b
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The results of the treatment of 20 boys with SCID-X1 showed that ____
a. SCID-X1 can be cured through genetic engineering b. none of those treated were cured of the disease c. a bone marrow transplant can cure SCID-X1 d. our understanding of the human genome exceeds our ability to modify it e. the “treatment” caused numerous unforeseen complications.
Which of the following statements incorrectly describes common structural features of an animal secretory cell and a photosynthetic plant cell?
a. Both cells have Golgi apparatus. d. Both cells have a plasma membrane. b. Both cells have mitochondria. e. Both cells have a nucleus. c. Both cells have chloroplasts.
The herbicides (weed killers) 2,4-D and 2,4,5-T are examples of synthetic:a
abscisic acid. b. auxins. c. cytokinins. d. ethylene. e. gibberellins.
How are comparisons of the number of base substitutions at nonsynonymous sites between genes encoding homologous proteins in different species or in different members of a gene family used to construct a molecular clock?
What will be an ideal response?