The space between the cell membrane and the cell wall is important during aerobic respiration. Why?
A. Pyruvate is transported into the space to be converted into acetyl coenzyme A to enter the Krebs cycle.
B. Hydrogen ions are transported out into the space to set up a hydrogen gradient.
C. Oxygen combines with electrons in that space to form water.
D. Cytochrome electron carriers are located in the space.
Answer: B
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What is the correct sequence of wavelengths (beginning with the shortest)?
a. gamma rays, UV, x-rays, infrared, visible light, TV and radio waves, and microwaves b. TV and radio waves, microwaves, visible light, UV, infrared, x-rays, and gamma rays c. microwaves, gamma rays, UV, visible light, infrared, TV, radio waves, and x-rays d. gamma rays, x-rays, UV, visible light, infrared, microwaves, TV and radio waves e. gamma rays, x-rays, UV, infrared, visible light, microwaves, and TV and radio waves
What is meant when a bacterium is said to become "resistant" to an antibiotic?
a. The antibiotic kills or inhibits the bacterium. b. The antibiotic is metabolized by the bacterium, providing more energy for growth of the cell. c. The bacterium is neither killed nor inhibited by the antibiotic. d. The antibiotic mutates in a way that benefits the bacterium.
The class Insecta
a. Has more species than any other group of animals b. Is of major medical importance to humans c. Is of major economic importance to humans d. Are critical in ecology that the loss of all insects would cause a major disruption in nature e. All of the choices are correct