Essays Tagged: "dna molecule"

Mononucleus - Bacteria

hings on earth are the prokaryotic cells. Bacteria fall into the Monera Kingdom. They have a single DNA molecule in the cytoplasm. Almost all monerans have a cell wall that protects the cell and gives ... f all infectious diseases.VirusesViruses are submicroscopic parasites that consist of either RNA or DNA, but never both. There is also a protective coat of protein or of protein combined with lipid or ...

(6 pages) 90 0 4.0 Dec/1996

Subjects: Science Essays > Biology

The Search for the Double Helix

ent story autobiography, of a brilliant scientist, James Dewey Watson, who reveals the structure of DNA. But this book is not wholly about science. Far from it. It's about a race, or game, for the one ... f such prestige? By playing fair? Not in this case. To be the first to uncover the structure of the DNA molecule was going to take a little cheating, and we find out that Jim Watson was not the most ' ...

(4 pages) 56 0 3.5 Dec/1996

Subjects: Science Essays > Biology

DNA

DNA are nucleic acids that are made up of long units of called nucleotides. A nucleotide consists of ... f nitrogenous base that particular nucleotide contains. The nitrogenous bases that are contained in DNA are adenine, thymine, guanine, and cytosine. The sugar group that is attached to the sugar-phosp ... hate backbone is deoxyribose. Each nucleotides will link to another corresponding nucleotide in the DNA molecule, A with G, T with C, etc. These linkages form what seem to resemble the rungs of a ladd ...

(5 pages) 204 3 4.8 Feb/2003

Subjects: Science Essays > Genetics & Genome Projects

Explaining Mendel's theories within an example (haircolor).

ve black hair. How I got it has everything todo with my genes. A gene is a complicated segment of a DNAmolecule, which is an intricate part of a single cell - the buildingblock of life itself. For eve ...

(2 pages) 88 2 2.8 Mar/2003

Subjects: Science Essays > Biology > Human Biology

DNA Fingerprinting Vocabulary List.

·DNA fingerprinting/profiling/typing: analysis of section of DNA that have little or no known functio ... dely from one individual to another, in order to identify individuals·deoxyribonucleic acid (DNA): nucleic acid that contains the sugar deoxyribose·restriction enzyme: enzyme that cuts D ... cuts DNA at a specific sequence·gel electrophoresis: procedure used to separate and analyze DNA fragments by placing a mixture of DNA fragments at one end of a porous gel and applying an elect ...

(1 pages) 36 0 3.0 May/2003

Subjects: Science Essays > Biotechnology

Biology notes about DNA's roll in a cell and how it is fitted in. Also includes plenty imformation on Chromosomes.

DNA directs a cell's activities and determines a cell's characteristic. This vast amount of vital in ... activities and determines a cell's characteristic. This vast amount of vital information encoded in DNA is organized into genes. A gene is a segment of DNA that transmits information from parent to of ... ent of DNA that transmits information from parent to offspring. When a cell prepares to divide, the DNA molecule coils and twists into a dense structure called a chromosome. A chromosome is a rod-shap ...

(3 pages) 69 1 3.2 Aug/2003

Subjects: Science Essays > Biology

Biology notes on genetics.

cell. It has a cell wall but lacks a nucleus and membrane - bound organelles. A bacterium's single DNA molecule is not coiled around proteins to form chromosomes. Instead, its face of the plasma memb ... nstead, its face of the plasma membrane like a rope attached to the inner wall of a tent. First the DNA is copied, and then the cell splits.Before a bacterium can divide it must have two copies of its ...

(5 pages) 129 2 2.4 Aug/2003

Subjects: Science Essays > Biology

DNA.

Extracting DNA from the Bacterium Escherichia coliIntroduction Deoxyribonucleic acid is contained in allcells. ... erium Escherichia coliIntroduction Deoxyribonucleic acid is contained in allcells. The structure of DNA makes gene transmission possible. Since genes are segments of DNA, DNAmust be able to make exact ... to make exact copies of itself to enable thenext generation of cells to receive the same genes.The DNA molecule looks like a twisted ladder. Each"side" is a chain of alternating phosphate anddeoxyrib ...

(4 pages) 91 1 3.0 Nov/2003

Subjects: Science Essays > Biology

DNA: Unlocking the Secrets of Life

a momentous day for science. James Watson and Francis Crick had finally uncovered the structure of DNA, the molecule behind all forms of life on Earth, and their results were published in the journal ... y was probably the single most important discovery of the 20th century.Almost everyone has heard of DNA, but still very few people can tell you what DNA really is. DNA is an abbreviation for the term ...

(4 pages) 82 1 4.5 Mar/2004

Subjects: Science Essays > Genetics & Genome Projects

Discuss how recombinant DNA techniques may be used to correct a point mutation.

Point mutation is an error at a particular point on the DNA molecule. Since the changes occur in DNA, in order to fix the mutation, scientists have to find ... in DNA, in order to fix the mutation, scientists have to find out where something went wrong in the DNA structure and how to fix it. Technology improved and in recent years, we got new skills and we a ... nology improved and in recent years, we got new skills and we are able to change natural changes of DNA for our profit. It is still being worked on, but scientists can do a lot of impressing things wi ...

(3 pages) 36 0 5.0 Apr/2004

Subjects: Science Essays

BIOLOGY DNA NOTES

13.11. Structure and function of DNA .a. DNA is a complex biological polymer known as a nucleic acid.b. It is made up of small units ... sites (for the hydrogen bond)v. Two long chains of nucleotides combine by condensation to form the DNA molecule. Each single chain is composed of single nucleotides connected to each other. The two c ... ngle nucleotides connected to each other. The two chains are joined by a weak Hydrogen Bond.vi. The DNA's structure is called a Double Helix because it is made of a structure that appears like a twist ...

(5 pages) 71 0 2.5 Mar/2005

Subjects: Science Essays > Biology

DNA

nisms, humans included, consists of one or more molecules of deoxyribonucleic acid, better known as DNA. In the nucleus of each human cell, there are 46 chromosomes, and each chromosome contains a sin ... son, in the bacterial species Escherichia coli, each cell has only one chromosome and thus only one DNA molecule.Regardless of the organism, every molecule of DNA is constructed of two parallel, ribbo ...

(1 pages) 45 1 3.0 Apr/2005

Subjects: Science Essays > Biology

Using DNA as a starting point, do you believe there are limits to the knowledge people should acquire? Defend your answer.

reproduction, or self-replication, has become better understood. At the core of this process is the DNA molecule. Though not itself alive, DNA is usually regarded as the sine qua non of life. DNA is c ... is considered the identifying mark of a living system. We judge something as living if it contains DNA. Biologically, the human mind necessarily inherits a powerful drive to sustain self and kind. Ho ...

(5 pages) 33 0 0.0 Apr/2005

Subjects: Science Essays > Biology

Gene Mutations.

A gene is a long sequence of nucleotides on a DNA molecule. A mutation is a change in the amount of an organism's genetic material and when a chan ... to be a mutant. A gene mutation involves a change in one or more of the nucleotides in a strand of DNA. The sequence of nucleotides in a gene controls the order in which amino acids are made into a p ... ay arise. Frameshift mutations lead to a major change since it causes a large portion of the gene's DNA to be misread. The protein produced differs from the normal protein by many amino acids and is u ...

(2 pages) 36 0 2.0 Sep/2005

Subjects: Science Essays > Biology

The Full Process of the Formation of a Protein.

cytoplasm.Transcription is the first step in protein synthesis. This involves the unwinding of the DNA molecule in the nucleus followed by the formation of mRNA by using one of the polynucleotide cha ... he polynucleotide chains as a template for complementary base pairing according to the rules of RNA-DNA base pairing. Free nucleotides join to the mRNA strand under the influence of RNA polymerase. Wh ...

(1 pages) 25 0 3.0 Sep/2005

Subjects: Science Essays > Biology

Genetic Engineering

ngineering is a highly advanced and precise "technique of removing, modifying, or adding genes to a DNA molecule in order to change the information it contains. By changing this information, genetic e ...

(7 pages) 77 0 3.0 Mar/2006

Subjects: Science Essays > Genetics & Genome Projects

Genetic Engineering

y living organism's cells. Each chromosome is made up of fine strands of deoxyribonucleic acids, or DNA. The information carried on the DNA determines the cells function within the organism. Sex cells ... rmines the cells function within the organism. Sex cells are the only cells that contain a complete DNA map of the organism; therefore, the structure of a DNA molecule or combination of DNA molecules ...

(6 pages) 19 0 0.0 Oct/2001

Subjects: Science Essays > Biology

HSC Biology Syllabus - Genetics: The Code Broken? (Option) - All Dot Points Answered

he code for a polypeptide:•Describe the processes involved in the transfer of information from DNA through RNA to the production of a sequence of amino acids in a polypeptide:-The structures invo ... of a sequence of amino acids in a polypeptide:-The structures involved in polypeptide synthesis are:DNA: A gene contains a sequence of bases to code for a protein. Every set of 3 bases is called a cod ...

(28 pages) 75 0 5.0 Jun/2007

Subjects: Science Essays > Biology

Human Cloning

istic.According to the Office of Public Health Genomes, cloning is described as, "using specialized DNA technology to produce multiple, exact copes of a single gene or other segment of DNA to obtain e ... organisms for billions of years. There are three different types of cloning methods, which include: DNA cloning, reproductive cloning, and therapeutic cloning.Recombinant DNA technology or DNA cloning ...

(6 pages) 52 0 5.0 Sep/2007

Subjects: Science Essays > Genetics & Genome Projects

Protein synthesis

Biology Transcription- In the process of transcription a DNA molecule uncoils at a point along its structure where the neccessary information to construct th ... the neccessary information to construct the needed protein is. The weak hydrogen bonds between the DNA bases then break, using the neccessary enzymes, which opens the molecule out, then free RNA nucl ... then free RNA nucleiotides in the nucleus combine with their complementary bases on one side of the DNA it is not important which side it joins with as they both contain the same information. As RNA h ...

(1 pages) 771 0 0.0 Feb/2008

Subjects: Science Essays > Biology