BLOG ENTRY 8: BIOLOGY AND GEOLOGY PROJECT

BLOG ENTRY 8: BIOLOGY AND GEOLOGY PROJECT

Prokaryotic cell

dayana abarca 

axel ayala

raul cortez

daniela moran

gerson rivera

Cell parts :

Genetic material

 Genetic material known as Deoxyribonucelic acid (DNA) . DNA is the hereditary material found in the nucleus of eukaryotic cells (Animal and Plant) and the cytoplasm of prokaryotic cells (bacteria) that determines the composition of the organism. DNA is found in the nucleus of every cell and it is exactly the same in each cell. There is another type of genetic material found in cells and viruses known as ribonucleic acid (RNA).

Cell wall

A cell wall is a structural layer that surrounds some types of cells,situated outside the cell membrane,It can be tough, flexible and sometimes rigid and functions to provides cells with structural support and protection and to act as a filtering mechanism. Cell walls are present in plants,fungi and prokaryotic cells.where a major function is to act as pressure vessels, preventing over expansion when water enters the cells.Cell walls are absent from mycoplasmas.

Ribosome

The ribosome  is a complex molecular machine found within all living cells.Ribosomes link amino acids together in the order specified by messenger RNA(mRNA) molecules.Ribosomes consist of two major components: the small ribosomal subunit, which reads the RNA, and the large subunit, which joins amino acids to form a polypeptide chain.

Flagellum

A flagellum  is a lash-like appendage that protrudes from the cell body of certain prokaryotic and eukaryotic cells. The word flagellum in Latin means whip. The primary role of the flagellum is locomotion but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. Flagella are organelles defined by function rather than structure. There are large differences between different types of flagella; the prokaryotic and eukaryotic flagella differ greatly in protein composition, structure, and mechanism of propulsion. However, both can be used for swimming

Fimbriae

In bacteorology, a fimbria ((also referred to as “attachement pili” by some scientists)) is an appendage composed of curling proteins that can be found onmany Gram-negative andsome Gram-positive bacteria that is thinner and shorterthan a flagellum. This appendage ranges from 3-10 nanometers in diameter and can be up to several micrometers long. Fimbriae are used by bacteria to adhere to one another and to adhere to animal cells and some inanimate objects. A bacterium can have as many as 1,000 fimbriae. Fimbriae are only visible with the use ofan electron microscope. They may be straight or flexible.

Process

First we cut in half a water melon,then took out what was inside it,after we put in some jelly,then we let it in the fridge for about 5 or 6 hours. When we took out the water melon with the jelly we put on the top of the jelly some whipped cream(( but just on the middle though)),Then we added a little of gummies to simulate the Ribosomes and we stick some "worm gummies" to simulate the flagellum and the fimbriae. (check punctuation and capitalization)

Photos/Pictures