Posted by: mrborden | December 1, 2013

Week 14 Enzymes


Dec 2 2013
QFD: Being someone’s FIRST LOVE is great but being Someone’s LAST LOVE is beyond perfect.
?FD: Draw a picture that demonstrates osmosis with a hypertonic solution outside of the cell
Todays Objective: Students know and are able to understand: that enzymes are proteins that catalyze biochemical reactions without altering the reaction equilibrium and the activities of the enzymes depends on the temperature, ionic conditions and the pH of the surroundings
1) video clip on enzymes
2) notes on enzymes

Dec 3 2013
QFD: We take art, and I love all that. But I also like science for some reason. I just like finding out why things happen.
?FD: What is pH? What numbers would indicate an acidic solution? basic?
Todays Objective: Students know and are able to understand: that enzymes are proteins that catalyze biochemical reactions without altering the reaction equilibrium and the activities of the enzymes depends on the temperature, ionic conditions and the pH of the surroundings
Students will demonstrate their knowledge by describing the role of enzymes in a paragraph and completing the attached handout on enzymes
1) video enzymes


2) Prereading enzymes
3) Enzymes_Cahsee1
Prereading enzymes

Dec 4 2013
Todays Objective: Students know and are able to understand: that enzymes are proteins that catalyze biochemical reactions without altering the reaction equilibrium and the activities of the enzymes depends on the temperature, ionic conditions and the pH of the surroundings
QFD: Science is simply common sense at its best. ~Thomas Huxley
?FD: Describe how temperature would affect a enzyme and provide an example
1) quiz on Osmosis, diffusion, active transport and enzyme reactions
1) quiz

1) Most enzymes in living organisms function optimally in neutral pH surroundings, which have a pH level
A less than 7.
B more than 7.
C near 7.
D near 1.

2 Hypothermia occurs when a person’s core body temperature drops well below the normal 37.5 °C. Which of the following is most likely to occur when hypothermia sets in?
A pH level will decrease
B pH level will increase
C enzyme activity will increase
D enzyme activity will decrease

rateofraction
3 The effect of pH on the rate of a particular enzyme reaction is described in the graph above. Which of the following BEST describes the effect pH has on the rate of this particular chemical reaction?
A the rate of reaction decreases steadily as the solution becomes more acidic
B the rate of reaction increases and then levels off as the solution becomes more acidic
C the rate of reaction increases steadily as the solution becomes more acidic
D the rate of reaction increases and then decreases as the solution becomes more acidic

4 The reaction rate of chemical reactions can be influenced by several factors. The acidity of the solution will have an affect on the reaction rate only if
A there are H+ or OH– ions in the reactants or products.
B the temperature of the solution is very high.
C the pressure of the solution is low.
D the reactants and products are in a gaseous state.

5 Coral reefs primarily populate oceanic waters near the equator. Given their location, one would expect metabolic processes in coral reefs to MOST negatively respond to changes in
A pH conditions.
B temperature.
C fish populations.
D weather systems.

6 Most enzymes in the human body work optimally within the blood’s pH range of 7.35 to 7.45. The blood’s pH is BEST described as __________.
A slightly acidic
B slightly basic
C strongly acidic
D strongly basic

7rateofreaction
7 The activity of a digestive enzyme is shown in the graph above. This enzyme functions BEST in __________.
A acidic environments
B basic environments
C neutral environments
D both acidic and basic environments

8 Enzymes are often described as having characteristics that are so specific that they can be likened to a lock and a key. Which of the following BEST describes the “lock–and–key model” of enzyme function?
A a specific pH fits all enzymatic reactions
B a specific protein is the key to all enzyme structures
C a specific reactant fits a specific enzyme
D a specific salt concentration is the key to proper enzyme function

9 Proteins that act as biological catalysts to speed up chemical reactions without altering the reactions are known as __________.
A enzymes
B reactants
C enzymes

10 The activities of enzymes depend on the temperature, ionic conditions and the __________ of the surroundings.
A water concentration
B diffusive conditions
C osmotic conditions
D pH

11 Osmosis, the flow of water across a cellular membrane, always occurs in which of the following directions?
A from a low concentration of water to a high concentration
B from a high concentration of water to a low concentration
C from the inside of the cell to the outside of the cell
D from the outside of the cell to the inside of the cell

12 Osmosis occurs in living organisms as water moves across the cellular membrane. An environment is isotonic when the concentration of solutes in the environment is equal to the concentration of solutes inside the cell.
In isotonic environments, water flows
A inside and outside the cell at equal rates.
B from the environment into the cell.
C from the cell into the environment.
D from the cytoplasm into the cell membrane.

13membrane
13 Which of the following would best complete the concept map?
A is semi–permeable
B is made of lipids
C is made of proteins
D is non–polar

14 Which of the following statements is true about cell structure?
A Cells are enclosed by a thin, single layer of phospholipids and protein molecules.
B Cells are enclosed by a solid layer, or cell wall, for support.
C Cells are enclosed with semipermeable membranes.
D Cell casings allow molecules to pass unhindered in or out of the cell.

15 Which of the following structures is responsible for the movement of water into or out of the cell?
A chloroplast
B lysosome
C cell membrane
D mitochondria

16 The process in which substances enter the cell without the use of energy is called __________.
A passive transport
B active transport
C exocytosis
D endocytosis

17 Which of the following is a primary difference between prokaryotic and eukaryotic cells?
A Prokaryotic cells contain a membrane–bound nucleus, eukaryotic cells do not.
B Prokaryotic cells contain DNA, eukaryotic cells do not.
C Eukaryotic cells contain a membrane–bound nucleus, prokaryotic cells do not.
D Eukaryotic cells contain DNA, prokaryotic cells do not.

18 Unlike the prokaryotes, eukaryotic DNA is contained within the __________.
A central vacuole
B nucleus
C peroxisome
D cytoplasm

19 Which of the following statements is a major distinction between a plant cell and an animal cell?
A Only animal cells have membrane bound organelles.
B Only plant cells contain a cell membrane.
C Only animal cells contain a true nucleus.
D Only plant cells contain chloroplasts.

20 Animal cells contain all of the following organelles except __________.
A a cell membrane
B mitochondria
C chloroplasts
D Golgi apparatus

Dec 5 2013

QFD: The doubter is a true man of science; he doubts only himself and his interpretations, but he believes in science. ~Claude Bernard
?FD: Describe protein and name 4 amino acids
Todays Objective: Students know and are able to understand: that enzymes are proteins that catalyze biochemical reactions without altering the reaction equilibrium and the activities of the enzymes depends on the temperature, ionic conditions and the pH of the surroundings
Students will demonstrate their understanding of Enzymes by completing a web quest and answering all of the questions
1) webquest ENZYME WEBQUEST
enzymes

WEBSITE #1: http://www.northland.cc.mn.us/biology/Biology1111/animations/enzyme.html
WEBSITE #2: http://www.phschool.com/science/biology_place/labbench/lab2/intro.html
WEBSITE #3 http://www.lpscience.fatcow.com/jwanamaker/animations/Enzyme%20activity.html
Dec 6 2013
Todays Objective: Students know and are able to understand: that enzymes are proteins that catalyze biochemical reactions without altering the reaction equilibrium and the activities of the enzymes depends on the temperature, ionic conditions and the pH of the surroundings
QFD: Facts are not science – as the dictionary is not literature. ~Martin H. Fischer
The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them. ~William Lawrence Bragg
?FD: Describe protein synthesis in a complete paragraph
1) webquest
2) handout on enzymes
3) biome project groups prewrite
biodome
http://www.teachengineering.org/view_activity.php?url=collection/cub_/activities/cub_bio/cub_bio_lesson02_activity1.xml

cub_bio_lesson02_activity1_figure1

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