B2.1-2 Nucleic Acids

Question 1

What does DNA Do

Answer 1

Holds genetic information

Question 2

What does RNA do

Answer 2

Transfers genetic information from DNA to Ribosomes

Question 3

What are ribosomes formed of?

Answer 3

DNA & Proteins

Question 4

Nucleotide structure

Answer 4

Phosphate group, Pentose & nitrogen containing base

Question 5

DNA Structure

Answer 5

Double helix of 2 polynucleotide chains
Hydrogen bonding between complementary bases

Question 6

RNA Structure

Answer 6

Relatively short polynucleotide chain

Question 7

Base pairs in DNA

Answer 7

A - T
C - G

Question 8

Base pairs in RNA

Answer 8

A - U
C - G

Question 9

A condensation reaction between 2 nucleotides forms a

Answer 9

Phosphodiester bond

Question 10

Why is it called semi conservative replication

Answer 10

Half of the original DNA is conserved in the new molecule.

Question 11

First step of semi-conservative DNA Replication

Answer 11

DNA Helicase breaks hydrogen bonds between complementary bases

Question 12

What happens in the second stage of DNA Semi conservative replication, after DNA Helicase breaks hydrogen bonds between complementary bases

Answer 12

Complementary nucleotides are attracted to exposed bases

Question 13

What happens in the third stage of semi conservative DNA Replication, after Complementary nucleotides are attracted to exposed bases

Answer 13

DNA Polymerase joins the nucleotides together forming a new strand - 2 identical DNA molecules