CELL AND DEVELOPMENT part 1

MODEL ORGANISM

Canorhabditis elegans (nematode worm) is the model organism chosen. It is an organism that is used for genetic research because of their size and short generation.Their increased number in progency also helps in being well suitable for doing research on them. It is important for cell biology,aging and neuroscience. Canorhabditis elegans is mostly a model organism for aging for the investigation of animal development. It is mainly used because it is simple and easy to grow in bulky populations.

I AM A GERM CELL

I AM FOUND IN THE REPRODUCTIVE ORGANS AND GERMLINE TISSUES

Canorhabditis elegans is about 1mm long and consists of about 1000-2000 germ cells, exactly 959 somatic cell nuclei plus about 2000 germ cells, are counted in one sex. Being one of those germ cells i actually originate near the gut of the embryo in the nematode. Then I migrate to the developing gonads where I undergo cell division, mitosis and meiosis into gametes.

The purpose I was given is to produce gametes when they are needed in the body of the nematodes. Also I am the only cell that can undergo both mitosis and meiosis. When i get older I hope to become a healthy cell that will carry out my responsibilities and be the best cell I can be. My fate is to determine the sex of the nematode I am located in and produce gametes so it would be able to reproduce someday.

I am a circular cell structure that can fit into places that I am needed. I consist of a nucleus, mitochondria,nucleolus,endoplasmic reticulum, cell membrane , lysosome and more. The purpose of the mitochondria in my body is to help generate ATP which is needed for energy. This allows me to carry out my functions without getting tired. The nucleus helps to control cell growth and reproduction. The rest of the oraganelles inside me all play an important role to help me stay alive and continue with my job.

REFERENCES

• Anton Gartner, Peter R. Boag and T. Keith Blackwell, http://www.wormbook.org/chapters/www germlinesurvival/germlinesurvival.html
• Cyril Ramathal, http://www.intechopen.com

CELL AND DEVELOPMENT part 1

biochemchica

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MODEL ORGANISM

Canorhabditis elegans (nematode worm) is the model organism chosen. It is an organism that is used for genetic research because of their size and short generation. Their increased number in progeny also helps in being well suitable for going research on them. It is important for cell biology, aging and neuroscience. Canorhabditis elegans is mostly a model organism for aging for the investigation of animal development. It is mainly used because it is simple and easy to grow in bulk populations.

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CELL AND DEVELOPMENT part 1

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MODEL ORGANISM

Canorhabditis elegans (nematode worm) is the model organism chosen. It is an organism that is used for genetic research because of their size and short generation. Their increased number in progeny also helps in being well suitable for going research on them. It is important for cell biology, aging and neuroscience. Canorhabditis elegans is mostly a model organism for aging for the investigation of animal development. It is mainly used because it is simple and easy to grow in bulk populations.

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I AM A GERM CELL

I AM FOUND IN THE REPRODUCTIVE ORGAN AND GERMLINE TISSUE

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Canorhabditis elegans is about 1 mm long and consists of  about  1000-2000 germ cells, exactly 959 somatic cell nuclei plus about 2000 germ cells, are counted in one sex .Being one of those germ cells I actually originate near the gut of an embryo in the nematode. Then I migrate to developing gonads where I undergo cell division, mitosis and meiosis into gametes.

The purpose I was given is to produce gametes when they are needed. Also I am the only cell that can undergo both mitosis and meiosis. When I get older I hope to be healthy cell that will carry out my responsibilities and am the best cell I can be. My fate is to determine the sex of the nematode I am located in and produce its gametes so it will be able to reproduce someday.

I am a circular structure that can make me fit into places that I am needed. I consist of a nucleus, mitochondria, nucleolus, endoplasmic reticulum, cell membrane, lysosome and more. The mitochondria in my body helps to generate ATP which is needed for energy .This allows me to carry out my functions without getting tired. The nucleus help to control cell growth and reproduction in my body.

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REFERENCES

• ·         Anton Gartner , Peter R. Boag , and T. Keith Blackwell, http://www.wormbook.org/chapters/www_germlinesurvival/germlinesurvival.html.

 

• ·          Cyril Ramathal , WWW.intechopen.com

 

 

 

 

INSIDE A CELL

INSIDE A CELL

INTRODUCTION TO CELLS

Cells are the smallest unit of structure and function of all plants and animals. It is capable of  integrating the essential life processes.

cells are separated into two groups prokaryotic and eukaryotic cells.

The common features of prokaryotic and eukaryotic cells are:

1. DNA, the genetic material contained in one or more chromosomes and located in a nonmembrane bound nucleoid region in prokaryotes and a membrane-bound nucleus in eukaryotes

2. Plasma membrane, a phospholipid bilayer with proteins that separates the cell from the surrounding environment and functions as a selective barrier for the import and export of materials

3. Cytoplasm, the rest of the material of the cell within the plasma membrane, excluding the nucleoid region or nucleus, that consists of a fluid portion called the cytosol and the organelles and other particulates suspended in it

4. Ribosomes the organelle where protein synthesis takes place.

Hey bloggers i’m back  and ready to share more interesting topics with you. Instead of biochemistry i would be changing up my blogs with cells and development another exciting course.

BIOCHEM

COMING TO THE END OF BLOGGING I FINALLY REALIZE THAT I ACTUALLY LIKE IT.
THINKING ABOUT BLOGGING ABOUT OTHER THINGS IN THE FUTURE.THANKS TO JM I LEARNT AND DISCOVERED NEWS THINGS.

review on enzymes

Enzymes are proteins.
we need enzymes to help with the reactions taking place in our life. Without the enzymes the reactions would work slow.
some characteristics of enzymes:
1.it increases the rates of the chemical reactions without being consumed,without altering the chemical equilibrum between reactants and products.
2. it catalyze reactions both forward and backward
3.substrates binds to the active site
4.Bind through h-bonds,ionic bonds and some hydrophobic interactions.

Activation energy is the energy needed to start or push the reaction. The enzyme makes the reaction easy to proceed.
ACTIVE SITE:
Three events occurring at the active site:
1. The enzymes orient themselves to the active site
2.Amino acids are able to add charges(proton) or take them away.
3.they are able to induce strain.

Note that the substrate is specific to the active site.
There are two models which explains the fit between the enzyme and the active site.
1. lock and key fit: the substrate and the active site is exact fit.
2.induced fit: the substrate is different from the active site.Its changes the shape to fit into the active site.Therfore they will end up with an exact fit.

CHECK THIS OUT!!

THIS VIDEO IS ABOUT LIPIDS

STEROIDS

The structure of cholesterol consists of a two six-membered rings side-by-side with them sharing one side, a third six-membered ring off the top corner of the right ring and a five-membered ring attached to the right side of that. The central core of this molecule, consisting of four fused rings, is shared by all steroids, including estrogen, progesterone, corticosteroids such as, aldosterone, testosterone, and Vitamin D.

 Our bodies make about 2 g of cholesterol per day and that makes up about 85% of blood cholesterol. Cholesterol is the precursor to our sex hormones and vitamin D. Vitamin D is formed by the action of UV light in sunlight on cholesterol that has risen to close the surface of the skin.

Lipoproteins are clusters of proteins and lipids all tangled up together. This is a mean of carrying lipids, including cholesterol, around in our blood. There are two main categories of lipoproteins distinguished. Low density lipoprotein which deposit cholesterol on the walls of someone’s arteries. High density lipoprotein carries cholesterol out of the blood system.