Unit Eight - Part 1x - Orange Glen High School

thoughtgreenpepperMechanics

Oct 27, 2013 (3 years and 10 months ago)

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Resources from: D. Knuffke, Deer Park HS

AP Biology


Unit
Eight
:
Metabolism

Part
1:
Cellular Energetics

Instructions:

1.

Open the presentation.

2.

Watch the embedded video clips and move through the embedded content.

3.

Answer the “Questions to answer”.

4.

Make sure

you understand the “Things you should make sure you understand”.

5.

Feel free to view the “Supplementary Resources”.

6.

Write down any questions that you have about the material.

Topic Presentation:

Click

here

Note:

This is a two
-
part discussion

Textbook Reading:

1.

Part 1:
Chapter 8, sections 8.1, 8.2, 8.3

2.

Part 2:
Chapter 8, sections 8.4, 8.5

Biozone Pages:

Volume 2:

1.

Part 1
-

pp. 10
-
15

2.

Part 2
-

pp. 31
-
38

Supplementary Resources:

“Crash Course: Biology” videos:

ATP & Respiration:

Biology #7

Bozemanbiology videos
:


Bioenergetics



Life Requires Free Energy



Gibb's Free Energy



Enzymes



Part 1:

Theory

Questions to answer:

1.

State

the first law of thermodynamics and explain how living systems comply with this law.

Provide one real
-
life example to support your explanation.

2.

State the second law of thermodynamics and explain how living systems comply with this law.

Provide one real
-
life example to support your explanation.

3.

How is the maintenance of a highly ordered living system possible, given the tendency of the
Universe to tend toward increasing disorder?

Provide an explanation for the order of an
organism, AND an explanation for

the order of successive generations of organisms.

4.

Is a living system ever in equilibrium with
its

surroundings?

Explain why or why not, and when
equilibrium occurs (if ever).

5.

Explain the energetic advantage of coupling exergonic reactions to endergonic r
eactions.

Which
reaction must be greater in terms of energetic magnitude?

6.

Organisms are endergonic systems.

What are the exergonic reactions that provide living
systems with energy (give two examples).

Things You Should Make Sure You Understand:

1.

The
relationships between the following pairs of words:


1.


Anabolic v. Catabolic

2.

Exergonic v. Endergonic

3.

Energy v. Free energy

4.

Open v. Closed system

2.

The energetic relationship between an organism and
it
s surroundings.

3.

Why organisms need to release energy in a
series of controlled steps

4.

The structure of an ATP molecule.

5.

How an ATP molecule is converted into an ADP molecule and how that process produces energy.

6.

Why we can’t consume ATP directly.

7.

Why living systems need to take in more energy than they put out int
o the environment.




Part 2: Practice

Questions to answer:

1.

How do enzymes catalyze chemical reactions (don’t just say “they lower the activation energy”,
give me specific mechanisms).

2.

Explain the significance of reaction coupling in living systems.

How
is it used, and what does it
allow living systems to do that they would not be able to do otherwise?

3.

Why does the activation energy of many reactions in living systems need to be reduced for living
systems to function?

4.

Compare the “lock
-
and
-
key” model of
enzyme function with the “induced fit” model of enzyme
function.

5.

Explain how each of the following affect enzyme structure and function:

1.

Substrate concentration

2.

temperature

3.

pH

4.

salt concentration

5.

cofactors and coenzymes

6.

Explain the difference between a comp
etitive inhibitor and a non
-
competitive inhibitor.

7.

How is feedback regulation of enzyme reaction related to allosteric regulation of enzyme
function?

Things You Should Make Sure You Understand:

1.

Why enzymes are classified as catalysts.

2.

Specific examples of
enzymes used in all major metabolic pathways in living systems, and the
reactions that they catalyze.