| about me: | Paper birch/grey birch: | Barley | DNA Replication project:

about me:

Hello, call me lexi. I'm in Mrs. Maines 4th period biology class. I have one brother, I live with my mom and step dad. My dad lives in South Carolina along with my grandparents, aunts and uncles. I don't have any pets. About 3 years ago i moved from Purchase Line School District. I have lots of friends, but my best friend is Angel Clontz. The most important thing to me is, my family, I don't know what id do without them. I love country music and eighties music. Thats all im going to say about me.

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Paper birch/grey birch:

Betula populifolia is the scientific name for birch. A nickname for the tree is poverty birch, because of the poor conditions it can grow in. Birch trees can be infected from blight. Blight is a infection that discolors the leaves. Wild animals eat the seeds of Birch trees, such as various birds and rodents. Birch wood is used for making spools and bobbins, as well as toothpicks and ice cream sticks. It also is used for plywood, fuel and wood pulp, and it is used in landscape plantings. The Birch tree is found in the northern hemisphere, are somewhat able to survive in the arctic latitudes. In North america the white birch is found it does very well in cold weather.external image images.jpgexternal image images.jpg



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Barley

Barley is a grain it comes from annual grass. Barley is found in the United States. There are over 150 kinds of barley in the united states. Half or more of the barley in the United States is used for livestock feed. Around 25% of the barley crop is used for malting, of the malted barley some 80% is used for beer. Around 14% is used for distilled alcoholic products. 6% is used for malt syrup, malted milk and breakfast foods. To malt the barley it takes up to a week or more. Multiple steps are taken just to malt the barley.
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potato with water day 1


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potato with water day 2


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salt water day 2


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Dialysis day 1


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Dialysis day 2

POTATO1
WATER
POTATO2
SALT WATER
IODINE POTATO
DAY 1
DAY 1
DAY 1
WEIGHT- 6g
-Moist, crisp, white, firm
WEIGHT- 3.3g
- Moist, crisp, white, firm
WIEGHT- 67.8g
- White, chunky, milky looking, thick
DAY 2
DAY 2
DAY 2
WEIGHT- .27g
- Very moist, crisp, firm
WEIGHT- 2.10
- Soggy, flimsy, brownish, black color, dead looking, small.
WEIGHT- 2.27g
- Purple, really watery, weighed less, dialysis tubing was thinner.

DNA Replication project:


Telomeres are the long parts at the end of the chromosomes. They are crucial to the cell if its going to live. The telomeres keep the ends of various chromosomes from attaching.

Okazaki fragment when the replication fork opens enough DNA polymerase can begin to synthesize a section of complementary strands.

DNA ligase comes later when its working the opposite direction the Okazaki fragments get stitched together.

Telomerase is an enzyme that adds telomere repeat sequences to the 3' end of DNA strand. By lengthening the strand, DNA polymerase is able to complete the synthesis of the "incomplete ends" of the opposite strand.

Most cancers arise from somatic cells. but one of the most crucial features that makes a cancer cell different than a normal somatic cell is its ability to divide nonstop.

Transplanting cells is also called gene therapy. you remove the cells from the patient, transform the cell that they were not able to synthesize. Then put the cell back into the patient.

Cloning is when you make an exact copy of something, for example a sheep named Dolly. There was a nucleus taken from an adult sheep cell that had been growing in culture the donor was 6 years old and the cell had been growing in culture for several weeks.

when in comes to aging, cloned organisms die faster.






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the key

ORIGINAL HELIX
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the original DNA helix




STEP 1:

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the helix unwound





STEP 2:
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The DNA strands unzipped



STEP 3:
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The DNA strand I gets new strand II and DNA strand II gets new strand I



STEP 4:
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Helix put back together