Essays Tagged: "eukaryotic cells"

Inter-organismal Transport in Paramecium. This essay includes a bibliography.

um CaudatumParamecium are an exceedingly fascinating group of the ciliophora phylum. Paramecium are eukaryotic cells. They contain membrane bound nuclei, "DNA that is associated with histone proteins ...

(6 pages) 43 0 4.7 Feb/2003

Subjects: Science Essays > Biology

Relationships between certain Organelles.

The nucleus is the most obvious organelle in a eukaryotic cell. Virtually all eukaryote cells have a nucleus (red blood cells lose theirs and so ar ... es the information, which the cell needs to divide and carry out all its cellular processes. Inside eukaryotic cells, the DNA is associated with histone proteins, and is called chromatin. When the DNA ... necting flattened tubular tunnels, which are continuous with the outer membrane of the nucleus. All eukaryotic cells contain endoplasmic reticulum. The ER of a cell often takes up more than a tenth of ...

(3 pages) 36 0 0.0 Jul/2003

Subjects: Science Essays > Biology

Mitosis.

, and mitosis is the sole method of reproduction for many single-celled organisms.The life cycle of eukaryotic cells, or cells containing a nucleus, is a continuous process typically divided into thre ...

(4 pages) 60 0 3.7 Nov/2003

Subjects: Science Essays > Biology

A brief History of Life on Earth.

on what it was. Roughly two billion years later, these prokaryotic cells combined to form the first eukaryotic cells.The Cambrian period started about 543 million years ago, algae diversified and ther ...

(2 pages) 47 0 3.5 Dec/2003

Subjects: Science Essays > Biology

"Describe the theory of endosymbiosis and the arguments for and against this theory"

lles like mitochondria and chloroplasts were themselves prokaryotic cells before the development of eukaryotic cells. It was believed that a host cell, probably similar to amoeba, ingested a smaller c ... an obligatory symbiosis as the two sides lost some of their abilities to function without another. Eukaryotic cells like animals, fungi and some protists, then evolved to have cells that contains mit ...

(4 pages) 64 0 3.0 Dec/2003

Subjects: Science Essays > Biology

Module 1 biology notes

re surrounded by a capsule. Ribosomes are the only organelles found in their cytoplasm.ľEukaryotic cells have a nucleus that is separated from the cytoplasm by a nuclear envelope. Organism ... leus that is separated from the cytoplasm by a nuclear envelope. Organisms other then bacteria have eukaryotic cells. They are surrounded by a plasma membrane. Some are surrounded by a cell wall. Thei ...

(4 pages) 46 0 3.7 Feb/2004

Subjects: Science Essays > Biology

Aerobic Respiration

Cellular respiration is a metabolic process that occurs in the mitochondria of eukaryotic cells. Respiration is the opposite of photosynthesis, which uses energy from light to cre ...

(1 pages) 134 4 3.4 Jun/2004

Subjects: Science Essays > Biology

Develop some hypotheses explaining why only eukaryotic cells have evolved into multi-cellular organisms.

aryotic cells are structurally simple. They are found only in single-celled and colonial organisms. Eukaryotic cells have organelles with their own membranes. Single-celled eukaryotic organisms are ve ... otic organisms are very diverse, but many colonial and multicellular forms also exist. The first of eukaryotic cells probably evolved or split off from Archeans, which have attributes of both prokaryo ...

(4 pages) 46 0 5.0 Apr/2005

Subjects: Science Essays > Biology

Experimental design testing antibacterial soap.

yotic organisms, that lack organelles and circular DNA. They are much smaller and less complex than eukaryotic cells. They are classified mainly but appearance and how they group together. The main sh ...

(5 pages) 86 0 4.6 Dec/2005

Subjects: Science Essays > Microbiology

Detailed description of DNA replication and RNA transcription

e III adds on complementary nucleotides along the template.DNA replication occurs in the nucleus of eukaryotic cells and in the cytoplasm of prokaryotes. The replication of a DNA molecule begins at or ... riplets-are transcribed in the 5’3’ direction.Transcription also occurs in the nucleus of eukaryotic cells, in the cytosolic space of prokaryotes. The process occurs specifically in DNA. RNA ...

(6 pages) 31 0 5.0 Feb/2008

Subjects: Science Essays > Biology

Endosymbiotic Theory

The endosymbiotic theory explains the evolution of the eukaryotic cell and eukaryotic organelles by phagocytocis of small prokaryotic cells. This theory st ... phagocytocis of small prokaryotic cells. This theory states that some of the organelles in today's eukaryotic cells were once prokaryotic bacteria.In this theory, the first eukaryotic cell was probab ...

(2 pages) 3707 0 0.0 Nov/2008

Subjects: Science Essays > Biology

Cyanobacteria (blue-green algae)

is blue-green algae, cyanobacteria,Cyanobacteria are a much simpler type of cell, compared with the eukaryotic cells which are typical to the majority of species, as it lacks organelles. This type of ... ting that the DNA is not enclosed by a membrane. Prokaryotes contain characteristics different to a eukaryotic cell which help aid the function of the cell, these featured characteristics are; plasmid ...

(6 pages) 23 0 5.0 Nov/2008

Subjects: Science Essays > Biology

Phosphorylation in Yeast.

and dephosphorylation. Reversible protein phosphorylation provides a major regulatory mechanism in eukaryotic cells. Due to high variability of amino acid residues producing a relatively limited numb ... diction of such sites. Phosphorylation usually occurs on serine, threonine and tyrosine residues in eukaryotic proteins. Moreover, in prokaryotic proteins phosphorylation takes place on basic amino ac ...

(8 pages) 1170 0 0.0 Nov/2008

Subjects: Science Essays > Biochemistry

This paper is about Lynn Marguolis and her discovery of endosymbiosis; the theory that mitochondrias and chloroplasts evolved from bacterias.

EndosymbiosisBefore the 1960s many biologists pondered as to how eukaryotic cells evolved. Some scientists believed that these complex organisms evolved from prokary ... ted would have much evidence to help prove its truth.In 1967, Dr. Margulis hypothesized a theory of eukaryotic evolution. She "proposed that aerobic bacteria (that require oxygen) were ingested by ana ... e as long as they continued their partnership." (Biology.Com). The endosymbiotic theory states that eukaryotic cells originated from engulfing bacteria (prokaryotic) cells and forming a symbiotic rela ...

(1 pages) 14 0 0.0 Dec/2008

Subjects: Science Essays > Biology

Cell Structures: Prokaryotic & Eukaryotic Cells

apacity to the radiations, antibiotics, disinfectants, etc.The other category of the cells is ‘Eukaryotic cells’. These cells are classified into animal cells, plant cells, algae and fungi. ...

(3 pages) 16 0 0.0 Nov/2009

Subjects: Science Essays