DNA Flashcards
1
Q
what are the four bases?
A
cytosine(C)
guanine(G)
thymine(T)
adenine(A)
2
Q
what is a nucleotide?
A
is made of phosphate, sugar and base
in that order
3
Q
what is the structure of DNA?
A
a double helix shape joined by pairs of bases
4
Q
what are chromosomes made of?
A
made of DNA tightly coiled with protein
5
Q
how are bases joined together?
A
DNA bases have electrical charges and hydrogen bonds form weak forces of attraction
6
Q
how many bonds do each base form?
A
C an G form 3 bonds
A and T form 2 bonds
7
Q
what is the DNA code?
A
the DNA code contains instructions needed to make the proteins which is taken from the order of bases in a gene.
everyone except twins have different DNA
