" The Big Picture!" by Mr C

Last lessons Objective

Dialysis Lab and Membrane quiz

2.   DNA structure

3.   DNA function

Number One

Feedback on experiments

·      It is wise to listen to the criteria of lab

·      “if you are going to do a job, you might as well do it right…or learn from doing it wrong.

Number Two

DNA (the super coiled molecule) Power point

Wiki reference

https://en.wikipedia.org/wiki/DNA_supercoil

What do we mean by 3 and 5 end of DNA

https://www.youtube.com/watch?v=p835L4HWH68

visualizing DNA and coiling of DNA

https://www.youtube.com/watch?v=OjPcT1uUZiE

Understanding the properties of DNA

https://www.youtube.com/watch?v=mk6OoCK9Tow

Note:

1.    You should be able to remember how many steps and what protein structures are involved in making a chromosome

2.    You should know the structure of a nucleotide.

3.    You should know the significance of covalent and ionic or hydrogen bonds in DNA

4.    You should know the significance of a 5 and 3 end of DNA

5.    You should be able to explain the pros and cons of having DNA as a super coiled molecule

Number Three

The Functions of DNA

https://www.youtube.com/watch?v=4yCGH0hjOwg

Three functions of DNA

https://www.youtube.com/watch?v=YcMesQBg5Nw

1 Archival molecule

2 Synthesis of protein

3 Molecule linked to change within Evolution

Note

You should start learning “the bits” so that you can explain the steps of

a)   Replication (next class after exam)

https://www.youtube.com/watch?v=y4hKibS2fAo

b)   Protein Synthesis (next class after exam)

Wikigeek reference

http://www.wisegeek.org/what-is-protein-synthesis.htm#didyouknowout

Video about protein synthesis

https://www.youtube.com/watch?v=2zAGAmTkZNY

Key points

·      Discussions about DNA imply that you have learned both the structure and function of the DNA molecule.

·      Statement “DNA can function both coiled and uncoiled”. How do you explain this statement?

·      DNA is still a molecule with it’s own mysteries that are still be learned.

Next Friday