At the end of the cyclic electron pathway, the energy-spent electron returns to

What will be an ideal response?


photosystem I

Biology & Microbiology

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If a person had defective centromeres, which

of the following would result?

a. the DNA would not coil around histones b. DNA could not duplicate c. sister chromatids could not attach to each other d. the chromosome number would be reduced e. none of these would result

Biology & Microbiology

The main nitrogenous waste of adult amphibians is:

a. ammonia. b. urea. c. uric acid. d. peptides. e. purines.

Biology & Microbiology

Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of _____

A) phosphorylated proteins B) cAMP C) adenylyl cyclase D) activated G proteins

Biology & Microbiology

Hypothyroidism can be caused by a dietary deficiency in ____.

A. vitamin D B. multivitamins C. Penicillin D. thyroxin E. iodine

Biology & Microbiology