What is dna?
DNA stands for deoxyribonucleic acid, which is the material that is responsible for your genetic material or in other words the way you look. Deoxyribonucleic acid is a type of nucleic acid (polymer) made up of nucleotides (monomers). DNA is a double helix, meaning a twisting shaped strand, it is made up of two long chains of nucleotides. Nucleotides consists of three parts:
Nucleotides are bonded together by covelant bonds hat join together the sugar to the phosphate, this pattern is repeated and makes a sugar-phosphate "backbone"
What are the four Nitrogenous Bases?
DNA is made up of four nitrogenous bases, they are organized into two groups pyrimidines and purines. Thymine and cytosine are labeled as pyrimidines which are a single-ring structures. Adenine and guanine are labeled as purines which are double-ring structures. Scientists James Watson and Francis Crick made models of DNA, they were unsuccesfull until they found one of Rosalind Frinklins x-ray crystallography photos of DNA. Watson and Crick made a hypothesis based on the size of the nitrogenous bases that adenine pairs with thymine and guanine pairs with cytosine.
- Ring-shaped sugar called deoxyribose
- One phosphate group
- A nitrogenous base (there are four types of nitrogenous bases)
Nucleotides are bonded together by covelant bonds hat join together the sugar to the phosphate, this pattern is repeated and makes a sugar-phosphate "backbone"
What are the four Nitrogenous Bases?
DNA is made up of four nitrogenous bases, they are organized into two groups pyrimidines and purines. Thymine and cytosine are labeled as pyrimidines which are a single-ring structures. Adenine and guanine are labeled as purines which are double-ring structures. Scientists James Watson and Francis Crick made models of DNA, they were unsuccesfull until they found one of Rosalind Frinklins x-ray crystallography photos of DNA. Watson and Crick made a hypothesis based on the size of the nitrogenous bases that adenine pairs with thymine and guanine pairs with cytosine.