Photosynthesis and Cellular Respiration

In photosynthesis, chlorophyll containing cells convert light energy into the chemical energy of ATP, which is used to produce glucose. In cell respiration, glucose is oxidized to carbon dioxide and water, and ATP is produced

Describe the reactants, products and location of photosynthesis. / Describe the reactants, products and location of cellular respiration.
  • Write the equation for photosynthesis: ______
  • Write the equation for cellular respiration: ______
  • Label the reactants and products below for photosynthesis and cellular respiration:

Photosynthesis / Cellular Respiration

Name and describe the two types of anaerobic respiration (fermentation) (use another sheet of paper if you need more space):

______
______/ ______
______
Question Analysis

Compare and Contrast the processes of Photosynthesis and Cell Respiration: / A cell from heart muscle would probably have an unusually high proportion of
a.lysosomes.
b.mitochondria.
c.mRNA.
d.Golgi bodies.
Explanation: / - Compare and contrast aerobic and anaerobic respiration. Which one creates more energy in the form of ATP?
List the products of both types of fermentation:
1.
2.

Photosynthesis and Cell Respiration Study Guide

I. Photosynthesis
  • Plants use energy (sunlight) to convert water (H2O) and carbon dioxide (CO2) into oxygen (O2) and high energy carbohydrates (glucose) → C6H12O6
  • Location = Chloroplasts
  • Have pigmentschlorophyll that absorb light energy
  • Light energyabsorbed by chlorophyll is stored in energy carrier molecules – ATP and NADPH
II. Steps to photosynthesis
  • 2 steps: Light Dependent Reactions and Light independent Reactions (Calvin Cycle)- You will not need to know the names of the steps.
  • 1.) Light dependent reactions :
  • Reactants = light + water
  • Products = oxygen gas (O2) ,ATP and NADPH
  • 2.)Light Independent Reactions: (Calvin Cycle)
  • Reactants = ATP and NADPH (from light reactions)+ carbon dioxide (CO2)
  • Products = high energy sugars (glucose) → C6H12O6
  • Factors affecting photosynthesis:
  • ↑ light = ↑ rate of photosynthesis
  • ↑ CO2 = ↑ rate of photosynthesis
  • Optimum Temperature = 30 C (86 F)
  • Availability of water and nutrients
III. Cellular Respiration
  • Cellular respiration→ process that releases energy by breaking down glucose(requires oxygen –O2); maximizes energy for cell to use.
  • Location = mitochondria
IV. Steps to Cellular Respiration
  • 3 Steps: Glycolysis, Krebs cycle, & the Electron Transport Chain (You will not need to remember step names or names of electron carriers)
  • 1.) Glycolysis :
  • Breaks a molecule of glucose in half producing 2 molecules of pyruvic acid.
  • Requires investment of 2 ATP but produces a total of 4 ATP and 2 NADH molecules.
  • Net Gain of energy = 2 ATP + 2 NADH
  • If oxygen (O2) is present (aerobic), the energy carrier molecule NADH moves on to the Krebs Cycle
  • 2.) Krebs Cycle:
  • pyruvic acid is broken down into carbon dioxide (CO2) in series of energy-extracting reactions.
  • Uses enzyme Acetyl CoA
  • Products: ATP, NADH and FADH2 and CO2
  • The electron carries NADH and FADH2→ electron transport chain. The CO2 is released during exhalation
  • 3.) Electron Transport Chain:
  • Uses high energy electrons from the Krebs cycle to convert ADP into ATP.
  • last step in cellular respiration
  • Total ATP (energy) made 36 – 38
  • Fermentation (Anaerobic): 2 Types Lactic AcidAlcoholic fermentation
  • Anaerobic (no O2) after glycolysis, pyruvic acid is converted to lactic acid → occurs during exercise
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