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Copy of Transcription Models (5/28/2026)

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Last updated about 2 hours ago
8 questions
We will be using a set of models for this activity.

In part 1, the model to the left (model 1 - transcription) will be used.
2
Question 1
1.
2
Question 2
2.
1
Question 3
3.
According to this model, what enzyme is used during transcription? _______
3
Question 4
4.

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This is the model that will be used in part 2. Notice that it displays two mRNA strands. The one on top is labeled "pre-mRNA," as it has not yet been processed. The one on the bottom is labeled as "mRNA," as it has been processed.

Notice there are multiple structural differences between these pieces of mRNA that are labeled on the model.
2
Question 5
5.
1
Question 6
6.
Which molecule leaves the nucleus? _______
2
Question 7
7.
2
Question 8
8.
What end of the mRNA is the methyl cap? _______ What about the poly-A tail? _______
This model displays a piece of mRNA being copied from a segment of DNA; this process is called transcription.

a.) Where in the cell is the DNA found (examine the model)? _______

b.) Where in the cell is transcription taking place (examine the model)? _______
a.) What is being synthesized during transcription? _______

b.) What monomers are used to construct this molecule? _______
Notice on the model, where RNA polymerase is working, a small section of RNA and DNA are paired up. Notice the DNA and RNA nucleotides pair up in a similar manner that DNA nucleotides pair up.

a.) What is the name of the rule that describes how nucleotides pair up? _______

b.) According to the model, using the provided DNA nucleotides, what RNA nucleotides would pair with each?

DNA RNA

A _______
T _______
C _______
G _______

c.) According to the model, which strand of DNA is used to make the mRNA strand? _______
Contrast the mRNA at the top of the model with the mRNA at the bottom of the model.

a.) What was removed from the pre-mRNA to form the mRNA? _______

b.) What was added to the mRNA that was not present in the pre-mRNA? _______
During translation, the mRNA will be read from 5' to 3' to make a protein. Examine the sequence of RNA nucleotides at the 5' end in the mRNA and the pre-mRNA; look at the labels of each section of nucleotides on the pre-mRNA.

a.) What do you think is the name of the area on the mRNA that is read first during translation? _______

b.) What is the sequence of RNA nucleotides of the area read first during translation? _______