How DNA Works

Question 1

What are the types of replication of DNA?

Answer 1

Conservative

Semiconservative

Question 2

In conservative replication, what do the two daughter strands contain?

Answer 2

One helix is purely original DNA

One helix is purely new DNA

Question 3

How does conservative replication work

Answer 3

The double helix remains intact and new strands form on the outside

Question 4

In semiconservative replication, what do the 2 daughter cells contain?

Answer 4

Both have one strand of original DNA and one strand of new DNA

Question 5

How does semiconservative replication work?

Answer 5

The double helix unzips and each strand replicates to produce a second new strand

Question 6

Which enzyme is used to unzip the DNA double helix?

Answer 6

DNA helicase

Question 7

Which bonds are broken in the unzipping of DNA?

Answer 7

Hydrogen bonds between bases

Question 8

Which enzyme lines up and catalyses the linking up of nucleotides along the template strand?

Answer 8

DNA polymerase

Question 9

What is DNA ligase used for?

Answer 9

Catalyses the formation of phosphodiester bonds between 2 strands of DNA