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Get true answers from experts in Genetics & DNA.
Prokaryotes define a specific type of organisms such as Bacteria where its genome is mostly a circular, single molecule of double stranded DNA. These organisms are capable of passing on their genes through asexual reproduction where a single cell results into two. As a result, bacteria is able to exchange DNA by three general processes: transformation, conjugation and transduction.
Published by Darcy Tang 66 months ago in Genetics & DNA | +3 votes | 2 comments
During DNA replication, there are chances that mutations arises when certain bases are inserted or deleted. However, mistakes always occur during DNA replication because its speed rate is approximately 3000 nucleotides per minute. Thus, the error rate is one per every 100,000 nucleotides which needs to be repaired using error-free mechanisms. These biological repair mechanisms include direct reversal, base-excision, nucleotide-excision, and mismatch in which will be further explained.
Published by Darcy Tang 66 months ago in Genetics & DNA | +0 votes | 0 comments
Overviews bacteriophage as a nonliving virus relying on their host to compose multiple copies of their biosynthetic machinery. Reviewing the debate of who proclaimed the true discovery of bacteriophage due to the publications of their independent discoveries. Summarizes the structure and lytic life cycle of the virus and how this function acts as a model organism for scientists working in the labs.
Published by Janine Fernandez 231 months ago in Genetics & DNA | +0 votes | 0 comments
There are a few differences in transcription of DNA between prokaryotes and eukaryotes. In this article, the focus will be primarily on how eukaryotes undergo from DNA to RNA with the main events that must occur, preinitiation, initiation, elongation and termination. Before mRNA is ready to be translated into a protein, there are three processes that it must undergo.
Published by Darcy Tang 67 months ago in Genetics & DNA | +1 votes | 0 comments
Meiosis is a sexual reproduction process in eukaryotes. This process produces gametes or spores. Gametes for animals and spores for plants. Under the process of meiosis, crossing over occurs and results in having four haploid cells. On the other hand, Mitosis only produces two diploid cells. Meiosis starts with only a diploid cell that consists of two chromosomes. This process has two stages, Meiosis I and Meiosis II.
Published by Wendy Ching 67 months ago in Genetics & DNA | +0 votes | 0 comments
GM foods are being grown in many countries. But different people have different things to say about their safety. Opinion is divided among scientists, consumers, environmentalists and politicians about whether or not GM food should be consumed. Why is there such a controversy? This article outlines the basic issue, and weighs the benefits of modified foods against the harmful effects.
Published by puneet sidhu 68 months ago in Genetics & DNA | +3 votes | 1 comments
This article describes an experimental type of treatment for HIV that is still in the testing stage. This article describes what the disease HIV is and how it affects a person's life. It then goes on to talk about the current treatment, possible future options based on scientific research and how this new treatment is different from current options.
Published by Lauren Griffiths 69 months ago in Genetics & DNA | +2 votes | 0 comments
Do you remember going to the zoo when you were younger and being so mesmerized by white tigers? They may have stood out to you because they seemed so different than the regular orange colored tiger. Maybe you didn’t see them at the zoo at all because they weren’t as common before. White tigers are actually regular Bengal tigers that express a recessive mutant gene that gives them their rare color.
Published by Arielle Canoza 69 months ago in Genetics & DNA | +0 votes | 0 comments
Mutations occur every day within our bodies without us even knowing them. Outlined here are the three categories of mutations that can occur: Synonymous, Missense, and nonsense. Synonymous mutations cause no changes in protein expression while missense and nonsense can have detrimental consequences to the organisms gene expression and also to the fitness or the individual.
Published by Max Thorwald 69 months ago in Genetics & DNA | +0 votes | 0 comments
Researchers Wang et al conducted an analyis on "AGING AS A CONSEQUENCE OF MISREPAIR-- A NOVEL THEORY OF AGING" to identify what misrepair is and how it relates to aging. A theory proposed by the researchers proposed modifications to “damage (fault)-accumulation theory” to say that aging is due to the body’s misrepair of DNA, and thus, tissue.
Published by Saema A 69 months ago in Genetics & DNA | +0 votes | 0 comments
A philosophic look at Evolution as a scientific study as proposed by Darwin in Origin of Species.
Published by Nora K Anthony 89 months ago in Genetics & DNA | +2 votes | 1 comments
By observing the rate at which mutations occur, a lot can be learned about the past. Among other things, the time at wich two species diverged can be calculated. Find out more here...
Published by BlaBla 91 months ago in Genetics & DNA | +1 votes | 1 comments
Sometimes chromosomes don't splice. How come? What are the consequences? Find out here...
Published by BlaBla 91 months ago in Genetics & DNA | +3 votes | 0 comments
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