Tuesday - DNA extraction and Beginning Translation

Today we did the Strawberry DNA extraction. You should be able to answer the questions below!

1. What are the following used for?
             Strawberry (why can't we use another fruit?)
             Soap/Salt
             Ethanol

2. How is DNA organized in the Cell?

3. Why does the DNA tangle when we remove it from the nucleus?

Here is good video describing the experiment!



We also started discussing translation. In your groups you came up with a starting list of the process. Try to answer the questions below

1. What are the main molecules involved in translation?
2. What is mRNA translated into?
3. What are the building blocks of that molecule?
4. What are codons and anticodons?

If you did not like the crashcourse video here are a couple more!



 (start at 5:15)

Or the HHMI video

Don't forget your homework is to continue the gizmo and read the Timid Mice article (on Veracross)

Griffiths and Hershey/Chase Experiments

Today you had a quiz on cell parts and atoms, molecules. We then started on your handout on the 3 major experiments that determined DNA is the genetic material. What other molecules were thought to be the material of heredity before DNA?

Here is the video we watched today. Make sure you are familiar with the 1st the experiments. Griffiths, Avery, and Hershey/Chase. We will likely use the video again when we move to DNA structure History.

Your homework for tomorrow is to complete the Microscope lab below is a video to remind yourself the proper use of a microscope.




Finally, Watch the crashcourse video on DNA structure and replication and begin working on your handout from class. I will create a new post with both handouts

New Term... NEW Question!

As we begin Spring term, we move into our "last question" of 2FS which is....

Is Biology Destiny?

We will start to try to answer this question by looking at cells and then DNA, proteins and traits.

Let's begin by watching the following video for your next class day. (Don't worry if you do not know all the terms. We will be going over much of them during the term (ex. transcription/translation). For the organelle question. you can use the crash course video if you would like.


 Answer the following questions.

1. Why are cells small and how does it relate to your last term?

2. How did scientists discover cells? What technology allowed them to see cells for the first time?

3. What are the 2 types of cells and give an example for each?

4. What are the similarities and differences of these two cell types?

5. What are organelles?

6. What are the 13 different organelles? Give a BRIEF description of each one.


Here is a 2nd video about cells if you want to review (it's a crash course video)

Body Temperature - Homeostasis

On Saturday we discussed homeostasis and examples feedback loops. 

Negative - thermoregulation (body temperature), Insulin production in the pancreas, 

Positive - Childbirth, blood clotting. 

We also discussed the parts of a feedback loop (see the video below)

Receptor
Effector

Stimulus

Response

You should also have read through the link below:

How does your body regulate temperature game

Below is the video that we watched in class. The second one is another description of body temperature regulation as a negative feedback loop