DNA & RNA, DNA replication,DNA history, DNA, chromosomes & genes Flashcards
What are the two types of nucleic acids?
Deoxyribose acid ( DNA ] Ribonucleic acid ( RNA ]
What are nucleic acids?
Organic molecules composed of nucleotides. They are the blueprint of protein that control all cellular activities.
What are DNA & RNA composed of?
Small monomers called nucleotides
What are the three parts of a nucleotide ?
Phosphate, Sugar & Nitrogenous Base
What is the structure of DNA and what is it called?
Spiral staircase & it’s called a double helix
What is DNA composed of
Composed of parallel chains of nucleotides
What is the name of bases that bond?
Complementary bases
What is the base pairs for DNA?
Adenine (A)
What is RNA composed of?
Single chain of nucleotides
What are the base pairs for RNA?
Adenine
What is the type of sugar for DNA that composes a nucleotide?
Deoxyribose
What type of sugar in RNA composess a nucleotide
Ribose
What holds complementary base pairs together?
Hydrogen bonds
Who discovered DNA contains genetic information?
Oswald Avery
Who discovered DNA has complementary based?
Erwin Chargaff … (Chargaff’s rule)
Who was the first person to see the structure of DNA & what did they discover
Rosalind Franklin and she discovered x-Ray diffraction
Who stole Rosalind’s idea and showed cricks and Watson?
Wilkins head of the lab she was a part of
Who is Francis crick and James Watson and what did they do?
Scientists who couldn’t quite figure the structure of DNA but once Wilkins showed them Rosalind’s model . They looked over theirs and were the first to build an accurate DNA structure
What do DNA, genes and chromosomes have in common?
They are the molecular basis of hereditary
Where is chromosomes located?
Nucleus
What is a chromosome?
One long thread of tightly coiled DNA
What does every cell contain?
Complete of chromosomes
When do the number of chromosomes varies?
When there is a different organism
What does the last pair of chromosomes determine and what is the name?
The last pair of chromosomes determines sex. Which is called sex chromosomes
