This morning we took out our Enzymes and Digestive Fluids Summary sheet for a stamp. We went over it in class, going over the specific enzymes and digestive fluids. This was important because we do have a quiz for tomorrow on Digestion.

Therefore, to prepare, Mrs. Stein came up with 3 questions on the board to quiz ourselves.

1. asked to describe carbohydrate digestion, where it takes place, what enzymes are involved and what molecules it acts on.

As a class, we decided that carbohydrate digestion begins in the mouth where amylase breaks down starch to maltose. Once the food leaves the stomach, pancreatic juice causes more amylase to finish changing starch into maltase, acting in the duodenum. The maltase digests the maltose, breaking it up into glucose molecules.

Starch --> Maltose  --> Glucose
       amylase             maltase

2. -Pepsin breaks down proteins into smaller polypeptide chains, found in the stomach. HCl kills the bacteria and lowers the pH level.
3. -Bile salts break big fat molecules into smaller ones in significance of a larger surface area. This is known as Emulsification.
After our discussion, we went to our lab benches and resumed with our Nutrient Lab. Today, we finished Benedict's solution, and observed the clear and orange outcomes in the test tubes. We will be finishing the rest of our lab tomorrow.



Homework!:

-Study for the digestion quiz tomorrow!

-Nutrient Lab due by end of class tomorrow.

Second Day of the New Unit

Tuesday November 30th, 2010
Today was the 2nd day of our new unit. When we first got into class, Mrs. Stein had us turn in our color coding homework into the bin, and we also got a new stamp for our Meiosis 11.4 homework. We also picked up our graded Protein Synthesis Activity.

After that, Mrs. Stein started to discuss a little more about Meiosis and how it differs from Mitosis. We took some notes, but Mrs. Stein reassured us that it is beyond necessary to understand what she's talking about before we write it down. If not, we can always ask for help. She pulled up a slideshow with the notes below, first giving us the phases in each Meiosis I and Meiosis II. Later, were slides on Mendel's Law of Independent Assortment, Crossing Over, and Meiosis in Men vs. Women.

Some things she pointed out were that:
-Dna replication does not occur between Meiosis I and Meiosis II.
-Meiosis II looks A LOT like Mitosis!
-Crossing over occurs only in Prophase I of Meiosis I.
-Meiosis has a greater variety of gene combinations.

Notes:
Independent Assortment:

• Mendel's Law of Independent Assortment
• Alleles (form of a gene) separate independently of each other
• Leads to formation of MANY different genes

Here is the link for the slides that you may of missed:

http://www.slideshare.net/debdstein/meiosis-phasesiosis-phases


The Homework is:
**Read 11.1 in textbook (Mrs. Stein is trusting us to read on our own without notes!)
**UP Pages 29-31
All for tomorrow^

With the last 10 minutes of class, Mrs. Stein showed us some slides and explained a few genetic terms you can find on UP 21. This will help on the homework (pages 29-31)
Also, she discussed Punnett Squares and how to create them, along with ratios, percents, and fractions for phenotypes and genotypes. She went over the pages for homework, and all the important steps on creating a punnett square and finding the Genotype and Phenotype.
Examples:
Genotypes- ex. 1 Aa : 1 aa, 50% Aa, 50% aa
Phenotypes- ex. 3 green : 1 yellow, 75% green, 25% yellow


aaannddddd...the next scribe is ZoE!

Monday - Rip-O-Meter Lab

In class on Monday we first came into the classroom and went over the agenda and homework for that night. The homework that was due for today was to read section 1.1 and came up with the 6 types of questions, and to gather leaves for the lab that day. We handed in our homework in the bin, and went to our lab stations to complete the Sample Experiment part in the packet which was pages 24, 25 & 26 based on the sample given us. Once our group finished, we pulled out the page and also turned it into the bin. After, we spent a few minutes trying to determine the names of our leaves. By then we were ready to start the lab. My group tested leaves by size, and so far we noticed that the bigger the leaf, the more pennies the cup will hold. Towards the end of class, we completed page 27 in our UP packet, asking us what the matierals, procedure and variables were for our specific experiment. Although we didn't all finish the experiment, Mrs. Stein did remind us of a few things before class ended. She told us that if we didnt understand the homework and didnt do well on it, or just never handed it in then we should ask to make an appointment with her for a homework pass before September 4th. She also reminded us that if we were having any problems with moodle, email her.


The homework for Monday night was:
-Read appendix B A-14/ A-15
-Quiz Thursday
-Rip-o-meter write up- 9/9 (UP pages 31-32)
and virtual microscope that you can find on moodle.


This was Mondays blog....I dont know why it wasnt working!

The next scribe is Evan