DNA History, Structure and Replication

Scientists credited with the shape of DNA

• Watson & Crick

• Franklin

• Mendel

• Hershey-Chase

The way DNA is formed, One side facing up, the other facing down

• Antiparallel Arrangement

• Sugar-Phosphate backbone

• Deoxyribose

• Nuceotide

The sides of DNA strand

• Sugar- Phosphate backbone

• Hydrogen bonds

• Nucleotides

• Bases

Which is not part of a nucleotide?

• Sugar

• Phosphate

• Bases

• Hydrogen bond

Which is the last step of DNA replication?

• RNA Helicase unwinds original DNA strand

• DNA Primase lays down RNA primer for new nucleotide bases.

• RNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

What is the principal enzyme involved in DNA replication

• glucose

• fructose

• DNA Polymerase

• Lactase

You are given the DNA strand 5'ATGCTCAGCTGA3'. What is the corresponding DNA strand?

• 5'UACGAGUCGACU3'

• 5'TACGAGTCGACT3'

• 3'UACGAGUCGACU5'

• 3'TACGAGTCGACT5'

DNA replication is ​ (a)   . Each side is used as a ​ (b)   . DNA ​ (c)   so when ​ (d)   takes places each new cell as an ​ (e)   copy.

• semiconservative

• template

• unravels

• mitosis

• identical

• meiosis

• nonidentical

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'

• 3' T T T A A A G 5'

• 5' A A A T T T C 3'

• 3' U U U A A A G 5'

Weak interaction between bases

• Hydrogen Bonds

• Sugar-Phosphate backbone

• Covalent Bonds

• Ionic Bonds