Enzymes

Today in lab we tested the catalyst in the enzymes of a potato and liver. When we added peroxide and the liver together it bubbled up to the top of the test tube, but whenever we added the peroxide and potato together it just barely bubbled. We placed the test tubes into 4 different experiments; ice water, boiling water, room temperature, and water bath.

The liver started out with 140mm of foam in each experiment.
The potato started out with 5mm of foam in each experiment.

Ice water:
Liver- temp. 6 degrees Celsius foam-15mm
Potato- temp. 5 degrees Celsius foam- 6mm

Boiling water:
Liver- temp. 71 degrees Celsius foam- 0mm
Potato-temp. 72 degrees Celsius foam- 2mm

Room temperature:
Liver- temp. 31 degrees celsius foam- 128mm
Potato- temp. 27 degrees Celsius foam- 6mm

Water bath:
Liver- temp. 52 degrees Celsius foam- 140mm
Potato- temp. 54 degrees Celsius foam- 5mm

Testing bio/molecules

Today's lab was over testing bio/molecules. We tested a variety of molecules and discovered if they tested positive or negative for glucose, proteins, lipids or starch.

PH lab

Today in lab we tested the pH level of the following 13 solutions:

Distilled water
Buffer solution
Vinegar
Ammonia
Lemon juice
Detergent
Roll aides
Coffee
Diet coke
Coke
Bleach
Baking soda
Lemon low concentration

We used a pH scale and the paper scale to find the pH of the solutions. Then we averaged the pH levels and decided wether it was a acid, base, or neutral.

pH scale

This lab was over pH scales and the first experiment we did was the tap water and the bromothymol blue. The tap water had a pH of 9. We added 10 drops of bromothymol blue to the water and blew into a straw adding 1000x more hydrogen making the solution turn a yellow color making carbonic acid.

Atom structures

In class on Monday September 17th we made atom structures. Each color stood for some type of atom.

Rat Dissection

Dissected a rat in class today! Ours was a male rat. We looked at all of the organs like the stomach, small and large intestine, liver, the heart .. Etc.

The picture that looks like a mouth piece is actually the rats diaphragm.

The other pictures are either of the rats outsides or it's organs.