Principles of Biology : Quiz 7 Study Guide


We will take Quiz 7 on Wednesday, October 8. I recommend that you answer these questions yourself or with classmates. This not a graded assignment, nothing is to be turned in. These questions are just to help you prepare for this quiz.
Reading: You should finish reading Chapter 5  and then read Chapter 6 in the text book. Also, this quiz will cover some material from Lab 6 as indicated in the questions below.

Slightly Modified: Monday, 10/6 5:00 p.m. New text indicated in bold. Question #20 is delayed and indicated by strikethrough.

There are flashcards and animations on the Aris site you should study.   Quick Link to the Aris Site.
Also, the cell images and animations on the yellowtang site are worthwhile.  See images and  animations on yellowtang.

Questions for this quiz from last week's study guide:

We did cover these last week and you should know them for this quiz.
1) What is endocytosis? what is phagocytosis? pinocytosis?
2) What is receptor-mediated endocytosis?
3) What is exocytosis?

New Questions:
4) Describe the overall flow of energy in living systems.
5) What are the first and second "Laws of Thermodynamics?" What do they mean in real life?
6) What is entropy? What is happenning to entropy in our universe?
7) What is an "exergonic" chemical reaction?
8) What is an "endergonic" chemical reaction?
9) If the "free energy" of the products of a reaction is greater than the free energy of the substrates, then what must occur for the reaction to take place?
10) If the "free energy" of the substrates of a reaction is greater than the free energy of the products, then what is released in the reaction?
11) How do catalysts work?
12) What is ATP and how does it "store" and deliver chemical energy?
13) What are "enzymes?" What is the "active site" of an enzyme? What is the enzyme-substrate complex?
14) What factors affect the rate of an enzymatic reaction?
15) Give two examples of enzymatic reactions that we have studied. Identify the substrates, the products and the enzyme by name.
16) What is an "activator" in an enzymatic reaction? What is an "inhibitor?" What are "co-factors?" What does "allosteric" mean?
    16b) We covered competitive and allosteric enzyme inhibition in class. See the text for activator and co-factors. Co-factors are required, activators are not.
17) What is metabolism? What is anabolism? catabolism?
18) What is a "biochemical pathway?"
19) What is "feedback inhibition?" (This is an example of a general concept of "negative feedback control" -- like a heater thermostat.)
    19a) Imagine that the product of a pathway like this is also being used up by a third party, not in the diagram. Then, when the amount  of  product in the cytosol (the liquid part of the cytoplasm) goes up, the factory that produces it (the biochemical pathway) is slowed down, and, when in short supply, the pathway is turned on. It can be part of a homeostatic system.

(and, from the lab book in the enzyme lab)...
20) Design an experiment that could test for the effect of pH on catalase activity. Do the same for  temperature. Identify the independent variable and dependent variable in each case. What controls would you use?


 Last Update : Oct. 6, 5:00 p.m.