BIOLOGY

D N A

Basics

DNA is dexyxbribonucleic acid DNA is a double stranded molecule in the shape of a double helix DNA carrie instruction for amino acid sequences(proteins), which makes your traits.

DNA is composes of monomers called nucelotoids

A nucleotide is composed of a sugar molecule, a phosphate group, and nitrogenous bases, Only nucleic acids has phosphate group

Adenine, thymibes, Guamine, and Cytocine are all parts of the four bases nucelotoids ar bases from, with G alwyas matching with C, and A alwyas mataching with C.

THERE ARE ALAYS 2 hydrogen bonds between A and T, and there are 3 hydrogen bonds between C and G, since there is a greater hydrogen bond amount, it will take greater energy to break that bond

AG are purines, and C and T are pyrimidines. To memorize it AG is silver, and remember, silver is always PURE There always TWO rings for purines, while there are 6 sides for pyrimdines

The chromsomes is in the Nucleu sof each cell, and in the chromosoms, there is 2 METERS of DNA

There is a protein called the histone protein where DNA wraps around it causing chromsomes to form

At average the human genome as about 80.000 to 100,000 genes, but what are they?

Genomes are all the DNA in the nucleus of a cell and the Gene is a segment of DNA that codes for the production a specfic proteins

Questions from tests and quizes

A: Phosphate B:Pyridine (thymine) C:Hydrogen Bonds D:Purine (Adenine) E:Deoxyribose Hover over me

Chromosomes

A karotype is a examition of cell's chrmosomes, with shows that humans have 46 chromsomes. There also 23 pairs of hologous pairs in human

Chromsomes pairs #1-22 are called autosomes and while the #23 are called sex with XX to equal female, and XY is male

Purine Pyramdine
Guanine and Adenine Cytosine and thymine