This week's assignments.

Digestive system:  please read sections 43.2 and 43.3 in the book. Have this done by monday.

Data Manipulation quiz/homework:  The thing I want you to test is whether my 1st period class is more likely to do homework earlier than my afternoon classes.  You will need to write a null hypothesis, figure out how to approach this data (something of a puzzle), run a t-test to check significance, calculate mean time of homework and standard deviations.  Here are the links for t-tests:  website, chart
Have this write-up for me by Monday.  remember, it is OK to work in groups, but then it should be graded as homework, rather than a test.  Good luck.

Times that 1st period e-mailed me the Ch. 2 quiz: 10:19pm, 7:40AM, 10:20pm, 7:48pm, 10:33pm, 11:12pm, 4:34pm, 7:55pm, 6:55pm, 11:00pm, 9:21pm, 3:40pm, 10:14pm, 6:34pm, 6:42pm, 9:31pm, 4:35pm, 4:38pm, 10:14pm, 9:50pm,3:53pm, 7:23pm.
Times that 7th period e-mailed me the Ch. 2 quiz: 7:26am, 11:35am, 3:37pm, 7:26pm, 8:55pm, 8:09pm, 9:29pm, 9:14am, 9:45pm, 8:09pm, 7:09pm, 4:32pm, 5:12pm, 6:55pm, 6:30pm
Times that 8th period e-mailed me the Ch. 2 quiz: 4:18pm, 9:26pm, 11:00pm, 12:04am, 8:05pm, 4:36am??,  9:47pm, 9:57pm, 4:13pm, 9:28pm, 8:11pm, 5:26pm, 8:35pm, 5:09pm, 6:10pm, 10:14pm, 9:30pm, 10:29pm, 11:05am.

Enzyme lab

Guidelines for the enzyme lab:
title
purpose (generally, it is to investigate some aspect of hydrogen peroxidase -or catalase- function)  You need to have a purpose specific to your investigation.
Variables: divide into the following three categories.
independent: the one that you manipulate
dependent: the one that you watch
other factors to remain constant
procedure:  This should be a detailed list of steps for your experiment.  You should
-explain the equipment (loggerpro, vernier pressure or O2 probes)
-explain the parameters needed for sampling
-explain amounts of various substances needed
-explain the amount and kinds of data collected.

Class,  when in doubt about something (sample amounts, sampling size, method, etc...) just make p something.
Bad: 'cut a small piece of apple' or 'record some data'
Good:  'get three grams of apple' or 'record data for two three minute trials'

enzyme lab

Notes for the H2O2 lab.

1.  open Loggerpro software and plug in the interface.  Plug in the pressure probe also.

2.You should be getting a reading on the screen.  goto experiment menu and choose data collection.  set for a five minute trial.  Set sample rate at anything other than 1/second.

Instructions for the lab:

1.  Fill a test tube with 2ml of H2O2.  Come get a 0.5cm cube adn add to test tube.

2.  Place the probe in the top of the tube and wait 20-30 seconds.  Do not start recording yet.

3.  Begin recording.

food source:  apples
enzyme name:  hydrogen peroxidase
substrate: 

Hello class.  Here's our protein/enzyme goals for today:

1.  Go through this animation .  This will provide all goals listed in #2 except specific inhibitors.

2.  be able to explain:  substrates, active sites, induced fit model of enzymes, inhibitors (both types with examples), and end-product inhibition.

3.  Find a recipe for seafood ceviche, 1000 year old eggs, or kimchee. Be able to explain how the proteins within these foods are "cooked".

This is our homework for today.

Enzyme reading

Class,

Hopefully you now know the forces at play when you fold proteins.  I wnt to remind you to read section 8.2 in the book on enzymes.

Carbohydrate lab

The lab write-up for our carb lab should include the following:

Title

purpose

procedure-keep it simple. just an outline of how to do the two tests

Benedict’s solution test:

1. add two ml of water.

2. Add 10 drops of sample to be tested

3. Add 10 drops of Benedict’s solution

4. Heat in hot water bats for 1:45 to 2 minutes.

5. Record results

Iodine tests:

1. Place sample to be tested into a ceramic well

2. Add 2-3 drops of iodine solution (IKI).

3. Record results.

.

Day 1 data

day 2 (today) data

Conclusion - be sure to explain day one's results, as well as the food table.

Evaluation - this should only include statement of weaknesses and suggested improvements.

Attention 7th, 8th period:  I retested egg whites with Benedict's solution.  The test was negative (the liquid remained blue).  Our classroom sample was somehow contaminated.  Please reflect on this in your lab write-up (potential source of error).

Protein reading: Our next reading in the book will be section 3.2 pages 39 to 45. although this is a larger assignment, it isn't due until monday.

Class,

Just a reminder: We will be having a quiz this week over the following:
molecule
characteristics of life
organic molecules
carbohydrates
lipids.

The quickwrite questions for today were:
1. What is Olestra? (Molecular components, please)

2. Why are there some problems with Olestra?

3. List three carbohydrates (one mono, one di, one poly)

4. What are the building blocks of lipids?

5. Structurally, how are trans- and cis- fats different?

6. What is meant by referring to a fatty acid as monounsaturated?

upcoming week

Good upcoming info for you to know:

1.  The assignment for the weekend:  find out what olestra is and why there is some controversy about it.

2.  Quiz on Tuesday.
The content will be characteristics of life, important atoms, lipids, and carbohydrates.

3.  Reason that Science is awesome!  Here's a great link to a fantastic radiolab file on parasites.  If this doesn't surprise/impress you then I don't know what will.  Please note:  the photo is a happy view of hookworms on an intestine wall.

Class, the link for our book website is at raven 7. Please e-mail me the chapter two self quiz results.

SHOP N C supermarkets

SHOP N C supermarkets. Everything a body needs....

Now with Cafe Na' for your pastry needs...

Actually, These are the elements a body needs. S...H...O...P...N...C... and Ca...Fe... Na...

Your task...find out two biological needs of S, P, Ca, Fe, and Na.  You may (should) work with your table so you only have to do a part of that goal.  I will give you time in class tomorrow to teach each other.