Unit 6

Question 1

what does antiparallel mean for DNA?

Answer 1

it runs 5’ by 3’

Question 2

helicase

Answer 2

unzips double-stranded DNA by breaking the hydrogen bonds between base pairs.

Question 3

leading strand

Answer 3

the strand where DNA polymerase moves towards the unwound helix

Question 4

lagging strand

Answer 4

replicates DNA with polymerase in short segments going away from the helicase

Question 5

Ligase

Answer 5

Bonds fragments together

Question 6

Transcription

Answer 6

DNA ->mRNA
RNA polymerase reads a DNA sequence and makes a complementary sequence

Question 7

translation

Answer 7

mRNA->Protein
travels into the ribosome where they turn the RNA strand into amino acids

Question 8

Inducible Operon

Answer 8

a type of gene regulation where the expression of a set of genes (the operon) is turned on in response to a specific molecule, called an inducer, when it is present in the cell’s environment.

Question 9

Repressible Operon

Answer 9

gene clusters in prokaryotes that are normally active (expressed) but can be turned off (repressed) by the presence of a specific molecule called a corepressor