COMPONENTS OF DNA Flashcards
1
Q
DNA is a large molecule made up of…
A
smaller sub-units called nucleotides
2
Q
each nucleotide consists of:
A
- nitrogenous bade
- pentose sugar
- phosphate group
3
Q
PENTOSE SUGARS:
what two sugars are used in nucleotides?
A
deoxyribose sugar -> used in DNA
ribose sugar -> used in RNA
4
Q
NITROGEN BASES:
what are the four nitrogen bases in DNA?
A
- A = Adenine
- T = Thymine
- G = Guanine
- C = Cytosine
(the fifth one [U = Uracil] found only in RNA) - replaces T
5
Q
CHEMICAL BONDS:
what are the three components held by?
A
covalent bonds
