1.5.2 DNA Replication Flashcards
1
Q
What type of replication is DNA replication
A
Semi-conservative
2
Q
Each new double helix created from DNA contains what strands
A
- One original strand (template strand)
- One new strand
3
Q
What does DNA replication ensure for species
A
Continuity of genetic information between generations
4
Q
New strands are what to template strands in DNA replication
A
Anti-parallel
5
Q
How are nucleotides linked in DNA replication
A
5’ to 3’
6
Q
Describe the process of DNA replication
A
- DNA helicase breaks hydrogen bonds between complimentary base pairs
- This allows the unwinding of the DNA double helix
- Strands seperate, and both strands are used as templates
- Free DNA nucleotides are attracted to and allign with exposed bases, forming complimentary base pairs
- Adenine and thymine, cytosine and guanine
- DNA polymerase catalyses the condensation reaction between adjacent nucleotides, forming phosphodiester bonds
- Nucleotides added 3’ end of strand
- Strands coil into double helix - one parent and one new strand
- Replication is semi-conservative
7
Q
What scientists investigated DNA replication
A
Watson and Crick
8
Q
Draw the results shown by Watson and Crick by coloured lines
A
9
Q
What would the results of Watson and Crick look like, if they were spun in a centrifuge
A
