DNA Extended Idk

Question 1

Why is dna replication said to be conservative

Answer 1

Strands from the original DNA acts a template.

New dna molecule contains 1 old strand and 1 new strand

Question 2

What does helicase do

Answer 2

Breaks the h bonds between the pairs so it can now act as a new template

Question 3

How is a new dna strand made

Answer 3

nucleotides from the nuclear sap attach to the exposed bases

DNA polymerase joins the adjacent nucleotides on a new strand 5’- 3’ direction via condensation and forming phodphodiester bonds

Question 4

Genetic code

Answer 4

Same based + sequences used by all organisms

Question 5

How does a gene determine the amino sequence

Answer 5

Consists of base triplets rhat are responsible for a specific code

Question 6

What does transcription occur and where does it take place

Answer 6

Produces MRNA and takes place in the nucleus

Question 7

Outline the process of transcription

Answer 7

RNA polymerase binds to the promoter region on a gene
Section of DNA uwinds causing free exposed nucleotides , antisense strand acts a template
Polymerase joins adjacent nucleotides to form phosphodiester bonds

Question 8

Process of translation

Answer 8

Ribosomes move along MRNA until the start codon
TRNA attaches to complementary bases on MRNA
Condensation occurs creating peptide bonds to occur between amino acids on trna

Requires energy from trna
This continues untill a stop codon is produced

Question 9

Describe how polynucletides are broken down + formed

Answer 9

Phosphodiester bonds form between the nucleotides via condensation reaction
Hydrolysis using addition of water then breaks these phosphodiester bonds

Question 10

Structure of ATP

Structure of ADP

Answer 10

Atp = three inorganic groups
Adp = two inorganic groups