Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > General Science Forums > Biochemistry Forum
Register Search Today's Posts Mark Forums Read

Biochemistry Forum Discuss and post questions regarding the study of Biochemistry. If you need homework help this is the place to ask!


Biochemical Unity Underlies Biological Diversity

Biochemical Unity Underlies Biological Diversity - Biochemistry Forum

Biochemical Unity Underlies Biological Diversity - Discuss and post questions regarding the study of Biochemistry. If you need homework help this is the place to ask!


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-15-2010, 03:57 AM
Pipette Filler
Points: 26, Level: 1 Points: 26, Level: 1 Points: 26, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Aug 2010
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Default Biochemical Unity Underlies Biological Diversity



The stunning variety of living systems (Figure 1.7) belies a striking similarity. The common use of DNA and the genetic
code by all organisms underlies one of the most powerful discoveries of the past century namely, that organisms are
remarkably uniform at the molecular level. All organisms are built from similar molecular components distinguishable
by relatively minor variations. This uniformity reveals that all organisms on Earth have arisen from a common ancestor.
A core of essential biochemical processes, common to all organisms, appeared early in the evolution of life. The
diversity of life in the modern world has been generated by evolutionary processes acting on these core processes
through millions or even billions of years. As we will see repeatedly, the generation of diversity has very often resulted
from the adaptation of existing biochemical components to new roles rather than the development of fundamentally new
biochemical technology. The striking uniformity of life at the molecular level affords the student of biochemistry a
particularly clear view into the essence of biological processes that applies to all organisms from human beings to the
simplest microorganisms.
On the basis of their biochemical characteristics, the diverse organisms of the modern world can be divided into three
fundamental groups called domains: Eukarya (eukaryotes), Bacteria (formerly Eubacteria), and Archaea (formerly
Archaebacteria). Eukarya comprise all macroscopic organisms, including human beings as well as many microscopic,
unicellular organisms such as yeast. The defining characteristic of eukaryotes is the presence of a well-defined nucleus
within each cell. Unicellular organisms such as bacteria, which lack a nucleus, are referred to as prokaryotes. The
prokaryotes were reclassified as two separate domains in response to Carl Woese's discovery in 1977 that certain
bacteria-like organisms are biochemically quite distinct from better-characterized bacterial species. These organisms,
now recognized as having diverged from bacteria early in evolution, are archaea. Evolutionary paths from a common
ancestor to modern organisms can be developed and analyzed on the basis of biochemical information
Reply With Quote
  #2  
Old 09-25-2010, 05:04 AM
Banned
Points: 61, Level: 1 Points: 61, Level: 1 Points: 61, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Biochemical Unity Underlies Biological Diversity

Hi every one
Reply With Quote
  #3  
Old 09-25-2010, 05:05 AM
Banned
Points: 61, Level: 1 Points: 61, Level: 1 Points: 61, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Biochemical Unity Underlies Biological Diversity

This is nice information
Reply With Quote
  #4  
Old 09-25-2010, 05:05 AM
Banned
Points: 61, Level: 1 Points: 61, Level: 1 Points: 61, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Biochemical Unity Underlies Biological Diversity

thanks for sharing this
Reply With Quote
  #5  
Old 09-25-2010, 05:05 AM
Banned
Points: 61, Level: 1 Points: 61, Level: 1 Points: 61, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Biochemical Unity Underlies Biological Diversity

I am so happy
Reply With Quote
  #6  
Old 09-25-2010, 05:05 AM
Banned
Points: 61, Level: 1 Points: 61, Level: 1 Points: 61, Level: 1
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Sep 2010
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Biochemical Unity Underlies Biological Diversity

thank you so much
Reply With Quote
Reply

Tags
biochemical , biological , diversity , underlies , unity


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Human Cytome Project - Update 24 Jan. 2005 Peter Van Osta Cell Biology and Cell Culture 1 08-01-2010 02:18 PM
Human Cytome Project - How to Explore - Update 14 March 2005 Peter Van Osta Cell Biology and Cell Culture 0 03-14-2005 02:31 PM
Human Cytome Project - Update 6 Jan. 2005 Peter Van Osta Cell Biology and Cell Culture 0 01-06-2005 11:18 AM
Wave Function Manipulation Experiments Consc Physics Forum 0 12-27-2004 11:07 PM
Druc discovery, diseases and the Human Cytome Peter Van Osta Cell Biology and Cell Culture 0 09-24-2004 07:42 AM


All times are GMT. The time now is 07:07 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.19229 seconds with 16 queries