The School of Biomedical Sciences Wiki - User contributions [en]

Telomere

2010-11-18T01:28:38Z

081688830:

A telomere can be defined as "The tip of a [[Chromosome|chromosome]], containing a [[DNA|DNA]] sequence required for stability of the chromosome end". Telomeres are unique structures which may be present at the ends of linear chromosomes. Organisms which possess linear chromosomes encounter difficulty when it comes to complete replication of DNA ends. [[DNA polymerase|DNA polymerase]] [[Enzyme|enzyme]] requires an [[RNA|RNA]] [[Primer|primer]] inorder to enable itself to copy DNA (DNA copied in a 5'-3' direction). The end of DNA replication is followed by the removal of the RNA primer from the lagging strand. This RNA primer removal leads to shortening of the chromosome with each round of replication.

Telomere

2010-11-18T01:26:24Z

081688830: Created page with 'A telomere can be defined as "The tip of a chromosome, containing a DNA sequence required for stability of the chromosome end". Telomeres are uni…'

A telomere can be defined as "The tip of a [[chromosome|chromosome]], containing a [[DNA|DNA]] sequence required for stability of the chromosome end". Telomeres are unique structures which may be present at the ends of linear chromosomes. Organisms which possess linear chromosomes encounter difficulty when it comes to complete replication of DNA ends. [[DNA polymerase |DNA polymerase]] [[enzyme|enzyme]] requires an [[RNA|RNA]] [[Primer|primer]] inorder to enable itself to copy DNA (DNA copied in a 5'-3' direction). The end of DNA replication is followed by the removal of the RNA primer from the lagging strand. This RNA primer removal leads to shortening of the chromosome with each round of replication.

<ref>Biochemistry (sixth edition) Berg et al</ref><ref>Genetics analysis of genes and genomes (seventh edition) Hartl et al</ref>

Haemoglobin

2010-11-16T23:34:05Z

081688830:

Heamoglobin is a protein which used in red blood cells to store and transports oxygen.Haemoglobin is made up of four subunits, two alpha (α) subunits and two beta (β) subunits.

Thymine

2010-11-11T11:50:31Z

081688830:

Thymine is one of the four bases which make up [[DNA|DNA]] molecules. It uses two [[Hydrogen|hydrogen]] bonds to form a complementary base pair with [[Adenine|Adenine]] (A).  

Thymine

2010-11-11T11:49:46Z

081688830:

Thymine is one of the four bases which make up [[DNA|DNA]] molecules. It uses two [[hydrogen|hydrogen]] bonds to form complementary base pairs with [[Adenine|Adenine]] (A).  