BISC 303 Exam Questions And Answers.docx

BISC 303 Exam Questions And Answers
Which photosystem produces oxygen? -
correct answer ✅PSII


Chemotroph -
correct answer ✅energy source is preformed molecules (as
opposed to sunlight)


Phototrophs -
correct answer ✅Energy source is light (as opposed to preformed
molecules)


Organotrophs -
correct answer ✅Electron donor is organic compound


Lithotrophs -
correct answer ✅Electron donor is inorganic compound


Heterotroph -
correct answer ✅Carbon source is organic compound


Autotroph -
correct answer ✅Carbon source is CO2 (can fix carbon)

,BISC 303 Exam Questions And Answers

Which phototrophic bacteria are oxygenic? -
correct answer ✅Cyanobacteria only


Two parts of photosynthesis -
correct answer ✅Light reaction (light energy converted to
chemical energy) and Calvin cycle (chemical energy used to reduce
CO2)


Purple non-sulfur bacteria -
correct answer ✅-Anoxygenic photosynthesis
-No PSII
-Electron source is succinate


Purple sulfur bacteria -
correct answer ✅-Anoxygenic photosynthesis
-No PSII
-Electron source is sulfur


Bacteriorhodopsin-based phototrophy -
correct answer ✅Bacteriorhodopsin = a membrane protein which
functions as a light-driven proton pump

, BISC 303 Exam Questions And Answers
-Generates PMF which is used to make ATP
-No ETC involved


Cyanobacteria vs. other photosynthetic bacteria -
correct answer ✅Cyanobacteria have chlorophyll a (like
eukaryotes) instead of bacteriochlorophyll, have 2 photosystems
instead of 1, use H2O as electron donor, and are oxygenic


Polyphasic -
correct answer ✅Combination of phenotypic, phylogenetic, and
genetic data to classify organisms


Rule for a species -
correct answer ✅At least 80% similar


Strain -
correct answer ✅descended from a single, pure microbial culture


Biovars -
correct answer ✅differ biochemically and physiologically