Daily Summary 01-11

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HONORS BIOLOGY
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NO CLASS TODAY (SEE YESTERDAY'S POST)



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AP ENVIRONMENTAL SCIENCE
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NO CLASS TODAY (SEE YESTERDAY'S POST)



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BIOLOGY
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AGENDA:

- Objectives: Use credible scholarly scientific literature to determine and report on the structure of DNA and the mechanisms / biomolecular machinery used in cells to build, repair, and copy this molecule

- Warm-up: Where is DNA usually found in most eukaryotic cells? What is the major function of DNA in all cells?

- ESLP Spring Projects [5]

- Overview of DNA structure and replication [20]

- Start DNA origami

- Use the 3-D Animation Library at the DNA Learning Center to better understand DNA structure and replication and to find accurate answers for the DNA wrapping/replication questions


OUTSIDE OF CLASS:

- Finish DNA wrapping/replication questions

- Finish DNA origami


NOTE on Spring ESLP Projects:

• Students may complete multiple projects—minimum requirement this time is two projects
• First project must be completely submitted by Friday, March 17th
• Second project must be completely submitted by Friday, June 2nd
• In addition to your finished product/task, you must also create a Blogger blog to show your (1) project outline/plan, (2) timeline, (3) budget statement, and (4) progress journal (series of blog posts) with photos. BioSITE participants will be invited to existing blog—see me to get an invitation to blog

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Structures of the DNA Molecule and of Chromosomes

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HONORS BIOLOGY / BIOLOGY
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DNA is a large molecule and ranges in size from just a few nucleotides (usually paired with a complimentary strand in a double helical form) in length to a chain (polymer) of tens of millions of nucleotides. Notice in the image below that the two complimentary strands run in opposite directions, an orientation called anti-parallel. Click on the image below to see a larger version.

The multi-level structure of a chromosome is shown in the image below--click on it to see a larger version. Remember, DNA in most eukaryotic cells only adopts this super compact chromosome form when the cell is going through mitosis--the rest of the time (interphase), the DNA is less tightly wound and packed.

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