Monday, February 18, 2008

Unit 1 Lab Project: Build a Cell

Cell Materials

These are the different items I used to make the cell.
The Silver Bowl is the Cell Membrane
The Stuffing is the Cytoplasm
Purple Ball is the Nucleus
The Blue Ribbon is the Rough Endoplasmic Reticulum
Blue Straight Pins are the Ribosomes
The Yellow Ribbon is the Smooth Endoplasmic Reticulum
The Crackers are the Golgi Apparatus
Clear Pink Beads are the Lysosomes
Clear Yellow Vitamis E pills are the Vesicles
Yellow Vitamins are the Mitochondria
The Thread is the Chromatin
Yellow ball is the Nucleolus

Functional Cell

  • The smooth ER (yellow ribbon) synthesizes lipids and has various other functions.
  • Transport Vesicles (clear yellow vitamin E pills) takes lipids to the golgi apparatus.
  • Rough ER (blue ribbon) synthesizes proteins and packages them in vesicles.
  • Transport Vesicles(clear yellow vitamin E pills) takes proteins to the golgi apparatus*
*the arrows are going in the wrong direction, they should be going from the Rough ER to the golgi apparatus.
  • Lysosomes (pink beads) contains digestive enzymes that break down cell parts or substances entering by vesicle.
  • The Mitochondria (yellow vitamins) is an organelle that carries out cellular respiration, producing ATP molecules.
DNA Replication

DNA strand is a double helix, when straightnened out it looks like a ladder. the sides of the ladder are made of phosphate-sugar backbones. The rungs of the ladder are alternating pairs of bases, thymine bonded with adenine & guanine bonded with cytosine.


The Hydrogen bonds holding the base pairs together "unzips", mRNA nucleotides are joining with RNA polymerase creating a new strand of DNA.

Mitosis


Prophase

Chromosomes are visible in the nucleus.
The nucleus fragments releasing the chromosomes.

Metaphase

Centromeres of duplicated chromosomes are aligned at the center of the cell.
Spindle Fibers attatched to the sister chromatids come from the asters on each end of the cell.

Anaphase

Sister chromatids part and become daughter chromosomes that move towards the spindle poles(aster).

Telophase

Daughter cells are forming as nuclear envelopes and nucleoli reappear.

Cytokinesis

A slight indentation, called a cleavage furrow, passes around the circumference of the cell. Actin filaments form a contractile ring around the cell, as the ring gets smaller the clevage furrow pinches the cell in half, each cell becomes enclosed by its own plasma membrane.

1 comment:

Larry Frolich said...

Celina Smith
SELF/UNIT EVAL.
I didn’t see this in your blog. It’s at the very end of the Unit One page and asks for some reflections on your own work, and also some feedback for me on the unit…it’s only five points, but if you still want to do it, it’s very helpful for me and I will award the points—just e-mail me when it’s done.

COMPENDIUM REVIEW 1: CELLS
Also great—same applies as for comp. 2


COMPENDIUM REVIEW 2: GENETICS
This is an exemplary compendium. Well –organized. I like your outline approach. The figures are great and appropriate—see if you can give me the source for figures next time. And very compelte—way to go!


MICROSCOPE LAB
This lab is perfect—the image is there, the background and the definitions asked for in the lab write-up. Nice job.

DRAGON GENETICS
Very effective lab. The images are perfect and you give some explanations. The lab write-up instructions also asked for some definitions of some structures important in genetics. Nice job!


BUILD A CELL
Your cell is beautiful and such well-chosen pieces. I especially like the way you used arrows to show how everything moves around the cell. Your DNA and mitosis is also very clear. The only other thing the instructions ask for is a similar close-up of protein synthesis and the role of ribosomes.


ETHICAL ISSUE ESSAY: GENETIC ENGINEERING
I also didn’t see this essay. It’s at the bottom of the Unit One page also. It’s also only 10 points, but a nice way to apply what we are learning and express some of your own likes and opinions. If you still want to do it this week, just e-mail when it’s done and I’ll evaluate it.


Celina,
Please don’t forget to do your peer color group feedback on their ethical issues essays—you’ll probably find it interesting to see some other blogs also. And get started on Unit II if you haven’t already. Let me know if you have any questions or concerns about this feedback or your grades which can be seen on the YC Blackboard site.

Outstanding work. Just be sure you see all the assignments—the self-eval and essay are not in your blog—I’ll still grade them if you just send me an e-mail when you’ve got them done. The rest is all exemplary work. Be sure you read the complete instructions to get every detail into the assignment (like the genetics definitions and the cell model protein synthesis). I know this unit was a lot of workand you did a great job—I think you’ll find the next unit to have a little less total information to handles.
Keep it up,
LF