Experimental evidence supporting the chemiosmotic hypothesis was gathered by using artificial vesicles containing a protein that can pump protons in one direction across the vesicle membrane to create a proton gradient
Which protein was used to generate the gradient in a highly controlled manner?
(a) cytochrome c oxidase
(b) NADH dehydrogenase
(c) cytochrome c
(d) bacteriorhodopsin
(d) Bacteriorhodopsin is a transmembrane protein that pumps protons across the membrane when exposed to light. The other proteins pump protons but are part of the electron-transport chain, so they would not be good options to show that it is only the proton gradient that is required in this system rather than any specific intermediate in the electron-transport chain.
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Cells of bone tissue
What will be an ideal response?
The number of glyceraldehyde-3-phosphate molecules that would be produced from 24 turns of the Calvin cycle would be
A. 8 B. 12 C. 6 D. 4 E. 48
Suppose you are presented with a tissue sample that contains long rows of cells surrounded by parallel bundles of collagen and elastin fibres. What is that tissue most likely to be?
a. cartilage b. blood c. fibrous connective tissue d. adipose tissue
Pseudonocardia is an organism that is hosted by ________.
A. ants that cultivate fungal gardens B. wood-eating insects C. marine invertebrates D. people with severe acne