If you tagged organic carbon inside a chloroplast with a fluorescent label, the location most likely to have a high concentration of labeled carbon would be in the
A. between the outer and inner membranes.
B. stroma.
C. inside the thylakoid.
D. thylakoid membrane.
Answer: B
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What is the difference between active and passive transport?
a. Passive transport is the movement of materials when the cell is resting rather than when it’s active. b. Passive transport is a pre-expiration activity performed by cells at the end of the cell cycle. c. Active transport, unlike passive transport, requires energy because the movement of materials is against the concentration gradient. d. Active transport moves materials across the membrane, but passive transport retains them on the cytoplasmic side only.
Two or more different tissues arranged to carry out a specific function is called a(n)
a. organ system. b. organ. c. tissue. d. organism. e. tissue system.
The vermiform appendix projects from the ileum. Indicate whether the statement is true or false
Vibrio cholerae usually exists in a harmless form until
A. a bacteriophage introduces a gene that codes for the botulism toxin. B. the lytic cycle destroys the host cells. C. a bacteriophage introduces a gene that codes for the cholera toxin. D. mutations cause the normal proteins to form a toxin causing cholera.