Activity #2

Picture 2. This image is of two replication forks for a human X chromosome. In this image, red letters are RNA nucleotides and black letters are DNA nucleotides. The shapes with boxed numbers pointing to them represent enzymes in the DNA replication process, though their shapes are not true to shapes seen on molecular levels.

Quiz

Question

Based on Picture 2, how many places along the human X chromosome can replication start?

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Question

Looking at Picture 2, enzyme 2 is primase. When enzyme 3 starts working at the site that enzyme 2 is at, will enzyme 3 add to the G or to the U?

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Question

Enzyme 3 is building the leading strand for which replication fork in Picture 2?

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Question

Where would enzyme 2 go to work next?

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Picture 3: This image is of two replication forks for a human X chromosome. In this image, red letters are RNA nucleotides and black letters are DNA nucleotides. The shapes with boxed numbers pointing to them represent enzymes in the DNA replication process, though their shapes are not true to shapes seen on molecular levels.

Quiz

Question

Where will an Okazaki fragment get made in picture 3?

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Question

Are the DNA polymerase III’s in picture 3 building leading or lagging strands?

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Question

How many places shown in this image can another DNA polymerase III work?

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Question

Where would enzyme 2 go to work next?

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Picture 4: This image is of two replication forks for a human X chromosome. In this image, red letters are RNA nucleotides and black letters are DNA nucleotides. The shapes with boxed numbers pointing to them represent enzymes in the DNA replication process, though their shapes are not true to shapes seen on molecular levels.

Quiz

Question

The enzymes labelled #1 will…

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Question

The enzymes labelled #3 will…

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Question

The enzymes labelled #4 will…

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Question

The enzymes labelled #5 will…

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Question

Where in your cells does picture 4 take place? Where in your body are these cells?

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Question

What is made at the completion of the process shown in picture 4?

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