Unit 7: DNA Replication & Protein Synthesis

Question 1

What is the function of the Rough ER in DNA replication?

Answer 1

To fold and modify the polypeptide chain

Question 2

Why do we need DNA replication?

Answer 2

To copy DNA into new cells for the body

Question 3

List steps of Transcription and Translation:

Answer 3

Helicase unzips DNA - Primase layers primer on strands - DNA Polymerase builds complementary RNA bases and fixes mistakes - Ligase glues double helix back together - new mRNA goes to the ribosome (rRNA) where tRNA carries its amino acid to the corresponding codons on the mRNA - Amino Acids bond to form Polypeptide chain (protein)

Question 4

what are the differences between DNA and RNA?

Answer 4

DNA is in form of double helix/RNA is single stranded
DNA has the base Thymine/RNA has the base Uracil
DNA only has one type/RNA has 3 types
DNA gives instructions for genetics/RNA transmits instructions