Dna Replication

Question 1

what are the stages of cell division?

Answer 1

• nuclear division

- cytokinesis

Question 2

what is nuclear division?

Answer 2

• the process by which the nucleus divides

- there are two types of nuclear division: mitosis and meiosis

Question 3

what is cytokinesis?

Answer 3

-follows nuclear division and is the process by which the whole cell divides

Question 4

What happens before DNA replication takes place?

Answer 4

• DNA must be replicated to ensure that all the daughter cells have the genetic information to produce the enzymes and other proteins required
• the process of DNA replication is very precise since all new cells are pretty much genetically identical to the original one

Question 5

what are the requirements for semi conservative replication to take place?

Answer 5

• the four types of nucleotide with their bases
• both strands of the DNA molecule act as a template for the attachment I these nucleotides
• the enzyme polymerase
• a source of chemical energy to drive the process

Question 6

what is the process of semi conservative replication?

Answer 6

• the enzyme DNA helicase breaks the hydrogen bonds linking the base pairs of DNA
• the double helix separated into two strands and unwinds
• each polynucleotide strand acts as a template to which complementary free nucleotides bind by specific base pairings
• nucleotides join in condensation reactions by DNA polymerase to form the missing polynucleotide strand on each of the two original polynucleotide strands of DNA
• each of the new DNA molecules contain one of the original DNA strands as half the original DNA has been built into each DNA molecule