AP Bio Unit 6 Review

A 3-nucleotide sequence from DNA or mRNA that codes for an amino acid is called a

• triplet code

• template strand

• primary transcript

• codon

Gene expression can be inhibited by ____ molecules binding to DNA and blocking transcription start sites.

• negatrons

• terminators

• negative oppressors

• negative regulatory

The directionality of DNA is ___

• parallel

• perpendicular

• perpetuated

• antiparallel

Function of Poly A tail...

• Add phosphates to the RNA

• Provide ATP for transcription

• Protect from hydrolytic enzymes 

• Site of ribosome binding 

What is the name given to part of a DNA molecule that codes for a protein?

• Glucose
• Chromosome
• Gene
• Phosphate

Tags

NGSS.HS-LS1-1

In transcription, which direction is DNA read?

• 3' to 5’

• 5' to 3’ 

• C terminus to N terminus

• N terminus to C terminus

what does a promoter do?

• it allows a gene to be transcribed
• it creates a DNA segment
• it is another word for ribosomes
• it is another word for RNA

In the top picture the operon is

• on

• off

In RNA, Uracil pairs with ______. 

• cytosine
• adenine
• guanine
• thymine

A portion of mRNA that is kept to translate into a protein

• Intron

• Exon

• Protective End

• Spliceosome