3.4.1 DNA, genes and chromosomes Flashcards
(7 cards)
1
Q
Structure of DNA
A
- deoxyribose sugar, phosphate and nitrogenous base
- A and T, C and G
- phosphodiester bond formed by a condensation reaction
- Long, double helix
2
Q
structure of RNA
A
- ribose sugar, phosphate and nitrogenous base
- A and U, G and C
- Phosphodiester bond formed by condensation reaction
- Short single stranded polynucleotide chain
3
Q
What does the genetic code code for
A
the specific order of amino acids in a polypeptide chain
4
Q
what feature of codons combat mutation
A
degenerate nature
5
Q
difference in prokaryotic and eukaryotic DNA
A
prokaryotic - short and circular
eukaryotic - long and linear
6
Q
How many individual chromosomes do humans have
A
46
7
Q
Homologus pairs
A
Two chromosomes that carry the same genes but can carry different alleles
