SB3c DNA+DNA extraction Flashcards
Four facts about DNA?
.Double helix
.Unique to every individual
.Codes to make proteins
.Found in chromosomes
What is the human genome made up of?
our DNA
Describe the structure of DNA? (3)
.Inside the nucleus of a cell, DNA is tightly coiled into chromosomes
.DNA contains two strands which forms a double helix
.The two strands are held together by bases
DNA is a polymer which means it is?
a long molecule made from joining repeating units.
What is each DNA nucleotide made up of? (3)
.phosphate
.sugar
.base
What are the four complementary base pairs?
.Adenine + Thymine
.Cytosine + Guanine
What is each base attached to?
a sugar and phosphate group to form the backbone of DNA.
Why are DNA bases slightly attracted to each other?
because they have a slight electrical charge.
What is the weak form of electricalchemical attraction called?
hydrogen bond.
What bonds do cytosine and guanine have?
3H-
What bonds do adenine and thymine have?
2H+
What does the order of DNA bases do?
codes for a gene which in turn codes for a protein.
What do differences in the order of DNA bases cause?
us producing different proteins therefore having different characteristics.
What can DNA analysis be used for?
to compare DNA bases and see if people are related.
