D1.1 DNA Replication Flashcards
1
Q
Watson and Crick Implication on DNA replication
A
- Discovery of DNA structure by Watson and Crick provided evidence that complementary base pairing was key to DNA’s ability to replicate.
2
Q
What is meant by ‘Unzipped’ DNA
A
- Bonds between nucleotides broken.
- New polynucleotide strands synthesized using originals as a template.
3
Q
Reasons for DNA replication
A
- Cell division: new cells need new DNA for growth and tissue repair.
- Reproduction: gametes require DNA to pass on genetic information.
4
Q
Enzymes in DNA Replication
A
- DNA Helicase - breaks hydrogen bonds and unwinds molecule.
- DNA Polymerase - forms the phosphodiester bonds between nucleotides.
5
Q
Bonds between Nucleotide bases in DNA
A
Hydrogen bonds
6
Q
Process of DNA being transcribed from nucleus to ribosome
A
- DNA strand broken down into two single strands by DNA helicase.
- RNA polymerase used to create an mRNA
