Essays Tagged: "bacterial cells"

The Use of Antibiotics Should Continue.

some point2. Antibiotics work by entering the bacteria and interfering with their production of new bacterial cells.Antibiotics are used in farming as they increase food production by killing the bact ...

(6 pages) 100 0 4.4 Aug/2003

Subjects: Science Essays > Biotechnology

Bacterial Cell Replication and cell changes/stages summarized.

Bacterial Cell ReplicationBinary fission is the normal method of replication among bacteria; in this ... fission is the normal method of replication among bacteria; in this method of cell replication, the bacterial cells simply increase their cell mass slightly, replicate their cellular genome (DNA) and ... matter of hours millions of cells may form from just a single cell!Conjugation is another means of bacterial "replication" although the cells do not really replicate as with binary fission. But conju ...

(4 pages) 59 1 2.8 Nov/2003

Subjects: Science Essays > Biology

Osmosis, of potato chips, got real good mark.

ening during osmosis. E.g. if water is withheld from a flowering plant then the plant will wilt. If bacterial cells are placed in concentrated salt-water solution, they collapse and die. Human blood c ...

(13 pages) 118 0 4.5 Nov/2003

Subjects: Science Essays > Biology

Study notes for the main scientists that participated in the early discovery of DNA and the early studies about DNA

. were placed in separate blenders to shake loose any parts of the phages that remained outside the bacterial cells -The mixtures were then place in separate centrifuges and spun around to forc ... ized would be lighter than the other DNA made in the 15N medium -Results of centrifuging the bacterial DNA eliminated other two models for DNA replication and proved Semiconservative model

(2 pages) 52 2 3.8 Feb/2005

Subjects: Science Essays > Biology

What do You Understand by Recombinant DNA Technology? Discuss the Moral, Ethical, Social, Economic and Environmental Issues Associated with the Technology, giving your views.

s Associated with the Technology, giving your views.There are two essential substances found inside bacterial cells required before the process can begin. Present in the cytoplasm of a bacterial cell ... terial cell are a number of small circular pieces of DNA known as plasmids. Also present within the bacterial cell are restriction enzymes which cut DNA molecules at specific sites. By selecting the c ...

(7 pages) 56 0 3.6 May/2005

Subjects: Science Essays > Zoology

DNA Experiments

the following:-the extracellular material contained 35S. This meant that protein is not inserted in bacterial cells when viruses reproduce-the intracellular material (the infected bacterial cells) con ... rier of genetic material that is needed for the formation of a viral progeny.b. Griffith and Avery- bacterial transformationStreptococcus pneumoniae, a bacterium that causes pneumonia, has two forms: ...

(2 pages) 16 0 0.0 Feb/2009

Subjects: Science Essays > Biochemistry

Energy and Metabolism; Cell Structure

tructure which will account for the boundless assortment of life.This week I will be discussing the bacterial cells: Plasma membrane and the Ribosome along with organelles: Golgi apparatus and Mitocho ... at pass through are part of active transport of molecules and ions.Survival? These structures allow bacterial cells to survive with active transport, which means cells are used for transportation. Cel ...

(6 pages) 36 0 5.0 Mar/2009

Subjects: Science Essays > Biology

Cell Structures: Prokaryotic & Eukaryotic Cells

Bacterial cells are ‘Prokaryotic cells’. These cells have several internal structures and ... ll the structures, the two selected structures are the cell- wall and endospores. The cell- wall of bacterial cells is found in three distinct shapes such as spherical, spiral and rod shaped. The cell ... nd polysaccharides. This is collectively called ‘peptidoglycan’. The cell- wall helps the bacterial cell to survive at a greater degree, as an independent ‘unicellular’ organism. T ...

(3 pages) 16 0 0.0 Nov/2009

Subjects: Science Essays

Lab Report of the Experiment of Conjugation of E. Coli

physical connection between the cells. In the following experiment, two strains of Escherichia coli bacterial cells (donor F'lac+strs and recipient F-lac-strr) underwent conjugation to produce a trans ... effectively transferred from the donor cells into the recipient cells via conjugation.Introduction:Bacterial conjugation is the unidirectional transfer of either genomic DNA or plasmid DNA from a don ...

(9 pages) 38 0 3.0 Jan/2010

Subjects: Science Essays > Biology