Quiz on Cellular Respiration, Photosynthesis, and Enzymatic Reactions
This quiz covers essential concepts of cellular respiration and photosynthesis. Key questions include the amount of ATP produced during aerobic respiration, the pigments responsible for fall colors in foliage, the minimum energy required to start reactions (activation energy), and the chemical formulas for glucose and water. Students are encouraged to review enzymatic processes, including how enzymes lower activation energy, and examine the light reactions and Calvin Cycle in photosynthesis. A reminder for students to study ahead of their upcoming test is also included.
Quiz on Cellular Respiration, Photosynthesis, and Enzymatic Reactions
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Presentation Transcript
Lecture 25 Mr. Sover 13 October 2009
Quiz • Remove everything from your desk except for a pencil and sheet of looseleaf.
Quiz • 1. How many ATP are produced by aerobic respiration? (I’m looking for the NET amount). • 2. Fall colors in foliage (leaves) are the result of what pigments (ie: red, yellow, orange) in chloroplasts? • 3. What is the name for the minimum amount of energy required to start a reaction? • 4. What is the chemical formula for glucose? (the chemical formula for water is H2O). • 5. What have you liked most about MUHS so far?
Activation Energy • The amount of energy needed to start a reaction.
Activation Energy • Don’t you dare cheer.
Enzymes • Proteins that lower the activation energy required for a chemical reaction within a cell. • Allows reactions to occur at the normal temperatures of cells.
Enzymes… • 1. are specific • 2. can be used over and over again
Enzyme plus substrate fits together like a lock and key • Induced Fit Model
Energy for Cells • The energy available to do work is called free energy. • Reactions that requires energy is called what? • Reactions that create energy are called what? • What is energy in the cell in the form of? • A-P-P-P • Energy is released in ATP by breaking apart one of the bonds between the phosphate groups.
Aerobic Respiration • Requires what? • What is the equation for aerobic respiration?
ATP is the Cell’s Energy Currency • It is the perfect amount of energy for cellular reactions.
When you lift a heavy object above your head and you feel pain after a while…what is happening?
1. alcoholic fermentation • 2. lactic acid fermentation • How many ATP are produced as a result of these types of fermentation (overall)?
Photosynthesis • Light is a form of radiant energy. • Radiant energy travels in waves. • The distance between wave crests is… • When white light passes through a prism, the prism separates it into a range of colors. • The range of colors that make up white light is known as the visible spectrum
Objects appear colored because the molecules in those objects absorb different wavelengths. • Chlorophyll reflects which colors?
Does photosynthesis occur in all plant cells? • Which other living things can use photosynthesis in their cells? • What is the chemical equation for photosynthesis?
Light Reactions • Convert light energy into chemical energy. • Occur across which part of the chloroplast? • Light excites electrons within the chlorophyll • Then they leave the chlorophyll and help bond phosphate to ADP. This creates what? • Water is split into hydrogen ions, electrons and oxygen • The electrons replace the original electrons which were in the chlorophyll
Remember… • 1. Light energy is absorbed and converted to chemical energy in the bonds of ATP. • 2. Water is split into hydrogen ions, oxygen and electrons. • 3. Hydrogen ions from water are attached to carrier coenzymes for use in later steps of photosynthesis.
The Calvin Cycle • Occurs across which part of the chloroplast? • Responsible for making what?
IF time permits… • Work with your lab partner on questions 1-8 on page 164.
Homework • STUDY for your test on Friday.
