Topic 1 - DNA + Protein Synthesis Flashcards
1
Q
DNA stand for?
A
- Deoxyribo nucleic acid
2
Q
DNA structure?
A
- 1 DNA molecule consists of 2 strands of repeating units (nucleolides)
- 2 strands twisted into double helix
3
Q
What’s the monomer of DNA?
A
- made up of lots of nucleotides (joined together)
- deoxyribose sugar (DNA)
-Ribose sugar (RNA)
4
Q
4 DNA bases?
A
- Guanine + cytosine
- adenine + thymine
5
Q
Purine bases?
A
- Adenine + guanine
6
Q
Pyramidine bases?
A
- Cytosine + thymine + uracil
7
Q
DNA is a polymer of what?
A
- is a polymere of mononucleotides
8
Q
What reaction forms a sugar phosphate bond?
A
- condensation
9
Q
Where do mononucleolides join together from?
A
- Phosphate (of one nucleotide) and phosphate group of adjoining nucleotide
- Peter to free form for diagram
10
Q
A base is attached to each sugar molecule
A
11
Q
What do sugar and phosphate units make up?
A
- The ‘backbone’ of the nucleic acid
12
Q
Base pairing:
A strands of double helix held by what type of bonds?
Bonds between the —?
A
- hydrogen bonds
-Between the bases
13
Q
Single hydrogen bond can be —?
Collection they can be —?
A
- Weak singularly
- very strong collectively
14
Q
Hydrogen bonds + phosphodiester bonds
A
Hydrogen bonds = between bases ( nitrogenous bases)
Phosphodiester= 5’ phosphate grp (of one nucleotide) + 3’ hydroxyl grp (of another)
( check freeform for diagram)
15
Q
Function of DNA?
A
- heredity material responsible for passing G.I from cell to cell
