Cellular Respiration

Topics: Cellular respiration, Adenosine triphosphate, Oxidative phosphorylation Pages: 6 (1120 words) Published: April 8, 2011
Name________Darrien Bolding_____________ Date________________

Cellular Respiration Webquest Worksheet
(from: http://zunal.com/webquest.php?user=19049)

Directions: Answer in your own words behind or under the questions. Do not copy and paste unless told to do so and then use quotes.

Part I. Process Overview

http://staff.jccc.net/PDECELL/cellresp/respintro.html Read the entire page! These questions are not in order! How is cellular respiration like combustion (burning)? [2nd paragraph] Its releasing energy.

How is cellular respiration unlike combustion?
The molecules from which we harvest energy give up their energy in a controlled fashion rather than all at once as what happens in a fire. What is the point of cellular respiration?
To harvest electrons from organic compounds.
What is ATP?
Organic compounds such as glucose and use that energy to make a molecule. Copy the picture of its molecular formula, copy the web page address and put it next to the picture. [pic] http://staff.jccc.net/PDECELL/cellresp/respintro.html Write the general formula for aerobic respiration. [You may copy but again you must have the web page next to it.] [pic]

Why is glycolysis considered an ancient process?
It’s the first step of cell respiration and we believe it arose in the early life of Earth’s revolution.

Fill-in the chart below…

|PROCESS |Starting Molecule |Molecules Produced |Net #ATPs |# NADH Produced | # FadH2 | | | | |Produced | |Produced | |Glycolosis |Pyruvate |ATP |2 |2 |0 | |Kreb’s Cycle |2carbons |ATP,NADH,FADH2 |NA |8 |2 | |Electron Transport Chain |NADH,FADH2 |ATP |NA |NA |NA |

Why is oxygen needed in the ETC? ________to make water_______________________

Part II. Glycolysis

Read and observe the following sites to find the answers: http://www.accessexcellence.org/RC/VL/GG/ecb/outline_glycolysis.php http://www.accessexcellence.org/RC/VL/GG/ecb/ten_steps_glycolysis.php http://www.science.smith.edu/departments/Biology/Bio231/glycolysis.html [Hint: I would read the questions, read and look at the material and then write the answers.]

Where does glycolysis take place?
In the cytosol.
How does ATP start this process?
It leaves phosphate behind
How many are needed?
What atoms in the glucose molecules are replaced by phosphorus donated by ATP? [Hint: look at the pictures!] Glucose and fructose.

What happens to the phosphorylated glucose?
It is filled with as much energy as it needs or can be filled with.

What is the name of the compounds formed?
Dihydroxyacetone and Glyceraldehydes.

What are the two molecules of NAD+ are reduced to?
NADH, and ATP.

At the end of this process, how many Ps are present in the products? 4 ATPs and 2 pyruvate.
What is the name of these molecules?
Four molecules of ATP are produced by what process?
Since __2__ ATP were used to start glycolysis, what is the net ATP synthesized? __2_ The final products of glycolysis (____Glucose_______________) can be further broken down by ________________ respiration in the...
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