MBT FL25 Transcription

What molecules are involved in transcription? (pick 3)

• mRNA

• DNA

• RNA Polymerase

• Amino acids

Label the Model of Transcription

a

b

c

DNA

RNA Polymerase

RNA

Which accurately describes what occurs during the elongation stage of transcription?

• A completed polypeptide detaches from the ribosome

• RNA polymerase reads the DNA template and adds complementary nucleotides to the growing strand

• RNA polymerase binds to the promoter of a gene

• Introns are spliced from pre-mRNA

Where does transcription take place in a eukaryote?

Where is the TATA box located?

• Within the introns

• Near the exons

• Near the poly adenylation sequence

• Within the promoter

What TWO things will be added to a pre-RNA strand during RNA processing?

• Modified Guanine 5' cap

• Extra introns to the 5' end

• Modified Thymine to the 3' end

• Poly A Tail to the 3' end

What occurs during splicing?

• A mature RNA leaves the nucleus

• The small subunit of the ribosome attaches to mRNA

• A sugar molecule is added to the pre-RNA

• Introns are removed and exons are stuck back together

Which of the following describes the difference between a prokaryote mRNA and eukaryote mRNA?

• Prokaryotes have longer mRNA strands due to presence of introns

• Eukaryotes have longer mRNA strands due to the presence of introns

• Prokaryotes modify the mRNA due to the presence of a nuclear envelope

• Eukaryotes modify the mRNA due to the absence of a nuclear envelope

What is the name for the parts of an mRNA molecule that are EXPRESSED?

Where on the DNA does the enzyme responsible for transcription bind?

• promoter

• enhancer

• polyadenylation sequence

• start codon