Which of the following is not a known function of RNAi?
A. directing the replacement of amino acids in an existing polypeptide
B. protection against invading RNA viruses
C. control of transposon activity
D. chromatin structure
A
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Which of the following best represents the path of electron flow that occurs during photosynthesis?
A. H2O?P680?Final Electron Acceptor?Electron transport chain?P700 B. H2O?P680?Final Electron Acceptor?P700?Electron transport chain C. P680?H2O?Final Electron Acceptor?P700?Electron transport chain D. P680?Final Electron Acceptor?H2O?Electron transport chain?P700 E. P680? Electron transport chain?Final Electron Acceptor?H2O?P700
Slow-growing NTM whose colonies become pigmented when exposed to light are referred to as:
a. scotochromogens. b. photochromogens. c. nonphotochromogens. d. chromogenicums.
Evidence for the endosymbiotic theory does NOT include which of the following?
a. DNA in prokaryotes, mitochondria, and chloroplasts is arranged in a single, circular genome. b. Endocytosized cells have been directly observed to survive in the cytoplasm of the host cell. c. Endocytosized organelles have been directly observed to survive in the cytoplasm of the host cell. d. Fossils of prokaryotic cells in the process of endocytosizing cyanobacteria have been discovered. e. There are some rRNA sequences that are similar between prokaryotes, mitochondria, and chloroplasts.
Apurinic sites (AP sites) involve a spontaneous loss of a(n)________ in an intact double-helix DNA molecule
Fill in the blank(s) with correct word