Suppose an electron transport chain that receives electrons from photosystem II fails to work during photosynthesis. How would the hydrogen ion gradient be affected?
What will be an ideal response?
The hydrogen ion gradient would not exist. The electron transport chain uses released energy to actively transport hydrogen ions from the stroma across the thylakoid membrane into the thylakoid compartment.
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In a disk diffusion assay for drug susceptibility, a drug producing a larger clear zone is always more effective than a drug than to one producing a smaller clear zone.
Answer the following statement true (T) or false (F)
An important function of myelin is to:
A. increase the size of the synaptic cleft. B. decrease the size of the synaptic cleft. C. increase the speed of nerve signal transmission along the axon. D. decrease the speed of nerve signal transmission along the axon. E. None of the choices is correct.
The functional group that forms covalent bonds between R groups within a polypeptide and that stabilizes tertiary structure is
A. ?SH B. ?OH C. ?COOH D. ?NH2 E. ?PO4
The primary, natural habitat of a pathogen where it continues to exist is called the
A. vector. B. reservoir. C. carrier. D. fomite. E. source.