Including the membrane of the surrounding vesicle, how many phospholipid (NOT lipopolysaccharide) bilayers should be found around each P. chromatophora's chromatophore, and which one of these bilayers should have photosystems embedded in it?
A) two; innermost
B) two; outermost
C) three; innermost
D) three; outermost
A
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A tomato plant is mutated with gamma radiation. A cellular analysis reveals that ATP synthase complexes found in the thylakoid membrane are inserted backwards into the membrane. What is the most likely outcome of this error?
A. A proton gradient will not be established in the thylakoid space in response to the activation of photosystem II B. The proton gradient in the thylakoid space will not be able to be used to generate ATP C. The thylakoid membrane will become permeable to protons as a result of this change D. The ATP synthase will pump protons into the stroma in this orientation E. This change is not likely to have any effect on the function of the ATP synthase enzyme with respect to its role in photosynthesis
The majority of an individual fungus lives "in" its food source. What characteristics of the fungal growth form make this a necessity?
A. Fungi have a high ratio of surface area to volume and are highly susceptible to dessication. B. Fungi have a low ratio of surface area to volume and are highly susceptible to dessication. C. Fungi require the stimulus of "pushing" through the substrate to stimulate growth. D. Fungi require more nutrients than other organisms, and large amounts of nutrients can only be acquired by living in a host.
In the ocean, swimming organisms that can move at will in the water column are referred to as
A) periphyton. B) zooplankton. C) megaplankton. D) nekton.
According to the endosymbiotic theory, the _____ were originally photosynthetic bacteria.
a. ribosomes b. mitochondria c. chloroplasts d. nucleus