Chapter 9 Cellular Respiration Flashcards
Organisms get the energy they need from ________
food
calorie
amount of energy needed to raise the temperature of 1 gram of water 1 degree of Celsius
cells break down food molecules _________________, capturing a lite bit of ____________ at key steps
gradually
energy
cellular respiration
a process by which organisms obtain food using oxygen
chemical equation
C6H12O6 + 6O2»_space;> 6CO2 + 6H2O + energy
3 stages of cellular respiration
glycolysis, Krebs cycle, electron transport chain
Purpose of all 3 stages
Glycolysis= make pyruvic acid
Krebs Cycle= a little more energy is produced
Electron Transport Chain= the bulk of energy is produced; needs products from other stages
BIOCHEMICAL PATHWAYS
aerobic pathways
the pathways of cellular respiration that require oxygen
-Krebs Cycle and ETC
anaerobic pathways
pathways of cellular respiration that does not require oxygen
-Glycolysis and Fermentation
____________________________ is a biochemical pathway with _____________ ______________________
photosynthesis, cellular respiration
photosynthesis removes ______ from atmosphere and ________________ ______________________ puts it back
CO2, cellular respiration
________________________ releases O2 into the atmosphere and cellular respiration uses that to release energy from ________
Photosynthesis, food
Glycolysis
means “sugar breaking,”
involves many chemical steps that transforms glucose (6-C molecule) into 2 molecules of pyruvic acid
(3-C)
when glucose is broken ____________ is released
energy
energy investment phase
2 ATPs must be invested to transform glucose
