DNA Flashcards
What does DNA stand for?
Deoxyribose Nucleic Acid
Where is DNA found?
Located in the nucleus, in 23 pairs of chromosomes that contain 20 000 to 25 000 genes that direct protiens to be synthesised.
Genes are made up of DNA
What do histones do?
Histones wrap the DNA strands up into the shape of a chromosone.
What is the bonding between the 4 bases?
Hydrogen bonding.
What is the phosphate group, what is the deoxyribose sugar, what is the bases?
What does purine and pyrimadine mean?
pyrimadine means they are a single ring compound.
Cytosine and Thymine
Purine means they are a double ring compound. Adenine and Guanine
Adenine must always pair with ______ and cytosine must always pair with ________.
Adenine and ____ form ____ hydrogen bonds between the two.
Cytosine and _____ form ____ hydrogen bonds between the two.
adenine must always pair with thymine and cytosine must always pair with guanine.
Adenine and thymine form 2 hydrogen bonds between the two.
Cytosine and guanine form 3 hydrogen bonds between the two.
The hydrogen bonding between the bases holds the two strands together and causes what shape of the DNA?
causes the double helix shape.
What does the order of bases in DNA determine?
it determines the primary structure of proteins because they specify the amino acid sequence.
