DNA Flashcards
1
Q
properties of DNA?
A
large polymer - 2 polynucleotides in a double helix
nucleotide has ribose phosphate and a nitrogenous base
a-t and c-g bonds by hydrogen bonding
2
Q
what is a genome?
A
is the entire genetic material of an organism
3
Q
where is DNA stored?
A
in the nucleus as long threaded structure called chromosomes
4
Q
what is a gene?
A
section of a chromosome that codes for a specific protein
5
Q
how is the genetic code read?
A
as triplets - each triplet codes for a single amino acid
6
Q
what is a mutation?
A
change in then DNA sequence
7
Q
do mutations in the triplet code have an effect on phenotype and why?
A
no effect on phenotype because
then mutation in the triplet code can still code for the same amino acid
silent mutations might occur which might not affect DNA sequence
