Picture this: you’re sitting in your room trying to start your biology homework. #1- Where does cellular respiration occur in the cell? You’re drawing a complete blank. The cytoplasm? The chloroplast? Mitochondria? What about the endoplasmic reticulum – smooth or rough? Wish you had some help? You can find great biology tutoring in Torrance here, at Study Hut Tutoring.
The cell cycles are the most challenging part of the year for many biology students. Here are all of the cycles listed in chronological order and grouped by function and location:
- Daytime – chloroplast (plant cell only)
Photosynthesis (thylakoid)
Calvin cycle (stroma)
- Nighttime (aerobic – with oxygen) – mitochondria
Glycolysis (cytoplasm)
Krebs/Citric Acid cycle (matrix of mitochondria)
Electron Transport Chain (inner membrane of mitochondria)
- Nighttime (anaerobic – without oxygen) – cytoplasm
Glycolysis (cytoplasm)
Fermentation (cytoplasm)
BEFORE YOU LOOK AT THE PICTURE BELOW, try this on your own: draw a big rectangle. Inside the rectangle, draw a chloroplast (circle with smaller circles inside of it), then draw a mitochondria (jelly bean-shaped oval with a squiggle inside of it). Now try to place all of the cycles above on the drawing, connected by arrows. If you can, add some important inputs/outputs of each cycle (H2O, CO2, O2, ATP, sunlight, glucose, etc). Does it look something like this?
1) During the day, the plant
– uses the chloroplast to make ATP (via photosynthesis) and
– glucose (Calvin cycle) to store up energy.
2) At night, the plant will take the glucose it made during the day (via Calvin cycle) and
– break it down (glycolysis) to
– make energy (Krebs/ETC).
3) If the plant does not have access to oxygen, it will do
– glycolysis and
– fermentation (instead of Krebs and ETC).
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