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Cellular Respiration Internet Activity

WRITE OUT THE CHEMICAL & WORD EQUATION FOR CELLULAR RESPIRATION:

Step 1: Glycolysis

Go to the following website (you may have to Google it): www.science.smith.edu/departments/Biology/Bio231/glycolysis.html

Follow the instructions below and answer the questions:

  1. Read the introduction
  2. Click on 1- Start Glycolysis and watch the animation.
  3. How many ATPs are needed to start glycolysis?
  1. How many carbons are in the original organic molecule? What is this molecule better known as?
  1. After the ATP is added to the reaction, how many carbons does the new organic molecule have? What is this molecule better known as?
  1. Click on 2- Splitting of glucose and watch the animation.
  2. When glucose is split, what is created?
  1. What happens to ATP as glucose is split?
  1. Click on 3- Energy generation and watch the animation.
  2. What organic molecule is created by glycolysis? How many carbon atoms does each molecule have?
  1. How many ATPs (per one glucose molecule) are created by glycolysis? How many total ATPs are present after glycolysis?

BIG POINT:

Where does glycolysis occur? ______

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Step 2: Kreb’s Cycle

Go to the following website (you may have to Google it): www.science.smith.edu/departments/Biology/Bio231/krebs.html

Follow the instructions below and answer the questions:

  1. Read the introduction.
  1. The Kreb’s Cycle is also known as the ______Cycle.
  1. Click on 1 as many times as necessary to answer the questions.
  2. What enters the mitochondria?
  1. What is the above substance converted to?
  1. What is ultimately produced?
  1. Click on 2 as many times as necessary to answer the questions.
  2. What combines with oxaloacetate?
  1. What is formed?
  1. Click on 3 as many times as necessary to answer the questions.
  2. What is generated by a series of redox reactions?
  1. At the conclusion of one cycle, one pyruvate molecule generates, SPECIFICALLY, what and in what quantity?

BIG POINTS:

Where does the Kreb’s cycle occur? ______

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Describe, in your own words, the major products of the Kreb’s cycle and the importance of each. ______

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Step 3: Electron Transport Chain

Go to the following website (you may have to Google it): www.science.smith.edu/departments/Biology/Bio231/etc.html

Follow the instructions below and answer the questions:

  1. Read the introduction.
  2. What is the electron transport chain (ETC)?
  1. Where does the ETC occur?
  1. Click on START then CONTINUE.
  2. What will be passed along the ETC?
  1. Click on 1 and watch the animation, reading the information in the box. Then click on 2 and watch the animation, reading the information in the box!
  2. Where are the protons (H+) moved from and to?
  1. What is the energy source for the H+ to move AGAINST the concentration gradient? What molecule brought them to the ETC?
  1. What are the two energy carrier molecules that provide electrons to the chain?
  1. When the electron reaches the end of the chain, what happens to it and what compound is made?
  1. Click on 3 and watch the animation.
  2. Where does the energy used to make ATP come from?
  1. What is the name of the carrier protein that enables the synthesis of ATP?

Conclusion: IDENTIFY and DESCRIBE the two (2) different types of Glycolysis. Provide an EXAMPLE and REASONING for an activity that each type of Glycolysis would utilize.

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