lesson 11

Question 1

Nucleic acids are assembled from nucleotides

Answer 1

DNA is a nucleic acid compsoed of nucleotides
nucleotides consist of
1. 5 carbon sugar (deoxyribose)
2. nitrogenous base (ATCG)
3. phospage group (PO4) attached to 5’ carbon of sugar

Question 2

phosphodiester bonds links nucleotides

Answer 2

formed between phospahte group of 1 nucleotide and the 3’ -OH of another nucleotide

Question 3

DNA replication requires

Answer 3

1. something to copy: parental DNA molecule (template)
2. something to do the copying: enymes (DNA polymerase)
3. building blocks to make new copy: nucleoside triphpshates

Question 4

DNA replication occurs in 3 stages

Answer 4

1. initiation: process of replication starts
2. elongation: new DNA strands are synthesized
3. termination: the process of replication ends

Question 5

replication is semi discontinuous

Answer 5

strands are antiparallel
DNA polymerase can only synthesize in 5’ to 3’ direction