MLH Education›Honors Biology›Comparing Photosynthesis and Cellular Respiration

Comparing Photosynthesis and Cellular Respiration

A Unit 2 review you fill in yourself. Three Venn diagrams: the two electron transport chains, the two cycles, and the two processes overall.

How to use this

  1. Fill in all three regions of a diagram, one idea per line. Write from memory first.
  2. Hit Check this one. You will get a count for each region, a tick next to everything it recognized, and a nudge about anything that looks like it is in the wrong region.
  3. Only then hit Show what I missed. Seeing the list before you have tried costs you the whole point of the exercise.
  4. Add what you missed in a different color, or go back to the strategy guides and work out why you missed it.

The checker matches keywords, so it is a study tool and not a grader. If you write something correct that it does not recognize, it will say so rather than mark you wrong. Your work is saved in this browser on this device only, so use Clear everything if you are on a shared computer.

What counts as an answer

Write a claim, not a word. The checker looks for the thing you are naming plus what you are saying about it, so a lone noun will not register even when it is the right noun. That is deliberate. A Venn diagram entry is supposed to be a statement.

Here is one real point from diagram 3: Both use electron carriers.

All of these count

  • both use electron carriers
  • they both move electrons around with NADH or NADPH
  • both processes use energy electron and hydrogen carriers with the letters NAD
  • each one has carriers that pick up electrons and drop them off

These will not

  • carriersnames the thing but says nothing about it
  • NADsame problem, and NAD on its own could be four different points
  • they do not use carriersa line that denies the point is not the point

When you reveal what you missed, every point listed shows the word combinations it accepts, so you can see what it was looking for.

1The two electron transport chains

Both processes run electrons down a chain of proteins in a membrane. Almost all the machinery is shared. What differs is where the electrons come from, which way the H+ goes, and who takes the electrons at the end.

Photosynthesis ETC thylakoid membrane Respiration ETC inner mitochondrial membrane 1 only here 2 both 3 only here

2The two cycles

The Calvin cycle and the Krebs cycle are both cycles in the fluid of an organelle, both run by enzymes, and both tied to a transport chain. One locks carbon up and the other takes it apart.

Calvin cycle stroma of the chloroplast Krebs cycle matrix of the mitochondrion 1 only here 2 both 3 only here

3The two processes overall

The big one. Line the two equations up and the reversal is obvious, but the shared machinery underneath is worth just as much attention.

Photosynthesis in the chloroplast Cellular respiration in the mitochondrion 1 only here 2 both 3 only here
0 of 61 points found across all three diagrams