Associate Program Material

Cell Energy Worksheet

Answer the following questions:

Cellular respiration:

• What is cellular respiration and what are its three stages?

It is the harvesting of energy that is stored in food, making a pathway for production of adenosine triphoshe (ATP). The three stages are glycosis, cirtric acid cycle, electron transport.

• What is the role of glycolysis? Include the reactants and the products. Where does it occur?

the role is to split sugars. Reactants are; food “sugars”. Products are; NADH produced, and is the first stage of cellular respiration

• What is the role of the citric acid cycle? Include the reactants and the products. Where does it occur? this begins after two molecules of three carbon sugar produced in glycosis is converted to a slightly different compound, its reactants are glycolysis with products of acetyl, CoA, NAD, and FAD and happens in the second step of cellular respiration.

• What is the role of the electron transport system? Include the reactants and the products. Where does it occur? This is the final stage of cellular respiration to carry membrame of mitochondria in eukaryotic cells. Having reactants to 02 and ATP produced.

Photosynthesis:

• What is the overall goal of photosynthesis? provide a substrate for respiration to obtain ATP, providing carbohydrates to plants for growth and maintance.

• Because photosynthesis only occurs in plants, why is it essential to animal life? because it takes carbon monoxide that animals breath out, in and converts it back to oxygen so they can survive.

• What is the role of the light reactions? Include the reactants and the products. Where does it occur? to prodneuce energy rich ATP and NADPH produced glucose, occurring in the chloroplast of the stroma. It reacts to co2, h2o, ADP, NADP+, products of it are oxygen, ATP, and NADPH.

• What is the role of the Calvin cycle? Include the reactants and the products. Where does it occur? It reduces carbon monoxide to sugar. Occurs in thlakoids is the chloroplast. The reactants are co2, ATP, and NADPH then produces glucose.

Summary:

• Explain how photosynthesis and cellular respiration are linked within ecosystems. without one the other cannot exist. The inverse relationship causes opposites depend on each other so the “entire cycles” take place = without = no life exists

• Visit the NASA website (http://data.giss.nasa.gov/gistemp/graphs/) and research global temperature changes. How has global warming affected overall temperatures? What effects do cellular respiration and photosynthesis have on global warming? It raises the temp. “heat waves”. It balances it until deforestation occurs = causes an imbalance, deforestation occurring causes things to deteriate makes co2 stay in atmosphere longer giving a greenhouse affect since animal population up and plants cannot keep up with the co2 when trees and plants are on the decrease.