Biology Chapter 12 DNA
Nitrogen base pairing
hydrogen bonds can form only between certain base pairs-adenine and thymine, and guanine and cytosine
Chromosomes
the coiled strands of nucleic acids that contain genetic information
What are the 2 classes of Nucleotides
Purines (AnGels) and Pyrimidines (Y)
Where are the chromosomes located
in the nucleus
nucleotides
What are fundamental structural units of nucleic acids and are composed of a phosphate, a sugar and a nitrogenous containing base
What are the 4 parts of Nitrogen Base
Adenine, Thymine, Guanine and Cyosine
4 classes or macromolecules
Carbohydrates, Lipids, Proteins and Nucleic Acides
What is the shape of DNA
Double stranded helix, twisted latter
The Double Helix/Watson and Crick's model
DNA was a double helix, which is two strands wound around each other
Is the following sentence true or false? According to the principle of base pairing, hydrogen bonds could form only between adenine and cytosine.
FALSE
What does DNA do
Stores and passes genetic information and is the code for proteins
What are the 3 parts of the Nucleotide Structure
Sugar, Phosphate and Nitrogen base
The nucleotides must be joined together in a specific order, true or false
TRUE
What is DNA?
Very long thin molecule made up of linked nucleotides that determines traits in every living organism
James Watson and Frances Crick
Which scientist used Rosalind Franklin's x-ray diffraction data to proposed the double helix structure of DNA
What is the chemical composition of DNA
adenine, thymine, guanine, and cytosine
genes
are coded DNA instructions that control the production of proteins within the cell.
replication
before the cell divides, it duplicates its DNA
What does RNA do
carries instructions for Protein Synthesis