Wednesday, October 27, 2010

Biomolecules webquest

Students,
Here is the second webquest assignment.


BIOMOLECULES Webquest – The Polymers of Life
Ms. Carter

Visit these sites and answer the following questions on a separate piece of paper. Leave a space between the answers. Do not write the questions.

1.     Describe the shape and bond types of proteins
2.     What happens to proteins when heated?
CLICK STEP THROUGH AND PLAY “FRYING EGGS”
1.     Write down the components of egg white and egg yolk
2.     Describe the proteins in an uncooked egg. Draw the protein and the bonds
3.     Explain what happens when the egg is cooked
4.     Take the quiz and write the answers you gave

1.     What are carbohydrates and how are they classified?
2.     What is a monosaccharide? Give examples
3.     Draw the ring structural formula of glucose
4.     Draw the linear structural formula of glucose
5.     What is deoxyribose? Draw the ring formula
6.     What are disaccharides? Give examples
7.     What happens during the dehydration synthesis? Look at the figure
8.     What is a polysaccharide? Give and explain the two examples given

  1. What is a lipid? Examples?
  2. What are neutral fats?
  3. What are saturated fats? Examples
  4. What are fats made up of?
  5. What are unsaturated fats? Examples
  6. What are phospholipids?
  7. Draw and label a phospholipids
  8. Define Hydrophobic and Hydrophilic
  9. Define Cholesterol
  10. Draw and label a cell membrane

  1. Summarize the video. Explain the structure of nucleotides, what they are, how they are arranged, what they are composed of, etc…

    • Cell or plasma membranes are composed of lipids, carbohydrates, cholesterol, and proteins (plus others). Draw a cell or plasma membrane. Label these biomolecules.
    • Draw and label a phospolipid.






Webquest Oct 28th, 2010

Students, here are the pages you need to work on.





ENZYME WEBQUEST




Choose ENZYMES:  The BASICS

1.     SLIDE ONE:  Enzymes are ________________that serve as __________________.
They _________________up or _______________    ______________reactions, but ALWAYS remain _________________.

2.    SLIDE TWO:  What is an ACTIVE SITE?



3.    SLIDE THREE:  Each ______________acts on a specific_____________.

4.    What is a SUBSTRATE? 

5.    DRAW an ENZYME and SUBSTRATE below.  Make each a DIFFERENT COLOR and label each.



6.    SLIDE FIVE:  YOU JUST DRANK A GLASS OF MILK!  DRAW THE CATALYTIC CYCLE OF LACTOSE BELOW!  LABELING THE SUBSTRATE, SUBSTRATE ENZYME COMPLEX, THE ACTIVE SITE, AND THE PRODUCTS.  MAKING EACH A DIFFERENT COLOR!


7.    Someone who is “LACTOSE INTOLERANT”…is lacking which enzyme?____________________











Enzyme Catalysis
Key Concepts
8.    _________________ catalyze reactions by lowering the _______________  _________________ necessary for a reaction to occur. The molecule that an enzyme acts on is called the _________________. In an enzyme-mediated reaction, _________________ molecules are changed, and _________________ is formed. The _________________molecule is _________________ after the reaction, and it can continue___________________________________________________________________________________________________________________________________.

9.    Each _________________ is _________________for the _________________ it will catalyze. In this laboratory,

Enzyme = catalase,  found in your liver
Substrate = hydrogen peroxide (H2O2)
Products = water and oxygen







10.  DRAW THE REACTION THAT TOOK PLACE ON THE LEFT USING YOUR OWN SHAPES, LABELING THE SUBSTRATE, ENZYME, ACTIVE SITE ON THE ENZYME, ENZYME-SUBSTRATE COMPLEX, AND THE PRODUCTS.







Enzyme Structure
11.   Enzymes are globular, functional _____________________. Their folded conformation creates an area known as the _________________ _______________. The nature and arrangement of __________________  ____________________ in the __________________  __________________ make it specific__________________________________________________________.

12.  DRAW A MODEL OF AN ENZYME, ACTIVE SITE, AND SUBSTRATE BELOW:







Some Factors That Affect Enzyme Action

13.  The conformation of an enzyme is maintained by interactions between the various ___________________ _______________ that compose it, and this conformation is sensitive to ________________________________________. Two important influences are _________________ and ________________. When an enzyme's ________________________ is significantly altered because of ____________ or ___________________ variation, the enzyme may no longer _____________________  ___________________. An enzyme is said to be _____________________ when it loses its functional shape.

pH and Enzyme Function
14.  Each enzyme functions best within a _______________________. For example, the enzyme__________________, which works in your stomach, functions best in a strongly ____________________environment. Lipase, an enzyme found in your _____________________________, works best in a __________________ environment.
15.  When the pH changes, the active site ____________________________ and affects ____________________ ________________. What happens to catalysis when an enzyme is subjected to a pH far from its optimum range?

16.  WATCH THE ANIMATION AND DESCRIBE WHAT YOU SEE BELOW:




Temperature and Enzyme Function
17.  Chemical reactions speed up as ____________________ is increased, so, in general,_________________ will ___________________ at higher temperatures. However, each enzyme has a temperature __________________________, and beyond this point the enzyme's _____________________________ is lost. ___________________ temperatures will ______________________ most enzymes.

WEBSITE#3
GO TO ANIMATION, then to STEP THROUGH

1st-Add a SUBSTRATE
2nd-Add an ENZYME
PRESS PLAY

18.  Describe what happened:





Make sure you are in the ANIMATION portion and go to STEP THROUGH…Watch the animation…it is a bit complicated.  Main idea I need you to understand is….

19.  TRUE or FALSE:  an enzyme can change shape and become ACTIVE or INACTIVE.