Reference no: EM132818395

Unit 2 Lesson 1

1. Describe three energy transformations that occur in everyday life.

2. Distinguish between kinetic and potential energy. Give an example of potential energy being transformed into kinetic energy.

3. Describe the reaction that occurs when ethane gas burns, through words and equation.

Describe the changes in energy as bonds are broken and formed.

4. Describe each of the following terms. Give an example of each.

i) Gibbs free energy

ii) exergonic reaction

iii) endergonic reaction

5. How does the formation of the enzyme-substrate complex explain the reduction of the activation energy of chemical reactions?

6. Give your own examples of the first and second laws of thermodynamics. Explain how your examples relate to each law.

Lesson 2

1. Using the bond energies, calculate the ΔHcombustion of one mole of glucose.

i) Write a balanced equation of glucose combustion .

ii) Make a table of total bond energy for reactants and products

iii) Calculate the difference between the two energy totals (the heat of combustion).

2. Why is ATP the energy source mainly used by cells?

3. Write the chemical equation that describes ATP hydrolysis.

4. In the first metabolism reaction of glucose, it undergoes phosphorylation to produce glucose-6-phoshate. (see steps below)

i) Complete the free energy calculations. (see table below)

ii) Label each reaction as endergonic or exergonic.

iii) Write an equation for net or resultant reaction.

iv) Indicate whether or not the coupled reaction is spontaneous or non-spontaneous. Explain.

Glucose + Pi --> Glucose-6-phosphate

ATP + H2O --> ADP +Pi

ΔG = +13.8KJ/mol (___________________)

ΔG = _______________ (_________________)

net ΔG = _______________________

Unit 2 Lesson 3

1. Why is the first phase of glycolysis known as the energy investment phase?

2. What is the source of the original two ATP molecules used in glycolysis?

3. The fructose-1,6-biphosphate appears to be symmetrical and yet it is split to form two different molecules. Identify the two molecules formed and explain how this is possible.

4. Explain why a transport protein is needed in the diffusion of pyruvate into the mitochondrion.

Lesson 6

1. In what way does the thylakoid membrane affect the appearance of plants?

2. Explain the term "primary electron acceptor"

3. Explain differences between the structure and functions of two types of chlorophyll a molecules in the reaction centre.

4. An action spectrum can be used by scientists to investigate aspects of photosynthesis.

i) Describe the meaning of action spectrum.

ii) How well would you expect a tomato plant to grow under a green light. Explain your prediction.