What happens in an electron transport chain?
a. Electrons move from a low energy level to a higher energy level.
b. Electron movement transfers energy to enzymes and other molecules.
c. Electron movement generates energy during each step.
d. Energy from the electrons is stored for future use in pigments.
e. The energy from the electron movement is used to break down ATP.
ANSWER: b
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A woman goes to the doctor and is diagnosed as having rheumatoid arthritis. What factors led to her development of this disease? Select all correct choices
A. Some of her T cells were not positively selected. B. Some of her T cells were not negatively selected. C. Some of her T cells are recognizing and responding to her normal self antigens. D. Some of her T cells are not recognizing and associating with her MHC proteins.
You genetically engineer an Arabidopsis plant to have a mutation in gene B. Which of the following phenotypes would you expect to see as a result of this mutation?
A. petals - petals - stamen - stamen B. sepals - petals - sepals - petals C. sepals - petals - stamens - carpel D. sepal - sepal - carpel - carpel E. carpels - carpels - stamen - stamen
Behaviors that appear to be genetically programmed are called
A. voluntary. B. fixed action patterns. C. ultimate. D. reflexes. E. innate.
The coefficient of coincidence reflects the frequency of observed double crossovers compared to the frequency of expected double crossovers. What is the relationship between the coefficient of coincidence and interference?
A) Interference is the inverse square of the coefficient of coincidence. B) Interference equals the coefficient of coincidence divided by the map units calculated. C) Interference is recombinants minus nonrecombinants. D) Interference is one minus the coefficient of coincidence. E) Interference equals the coefficient of coincidence.