Question

question 7
do errors happen during dna replication?
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question 8
how is dna in prokaryotes different than in eukaryotes?
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Explanation:

For Question 7: DNA replication is not a perfect process. Polymerase enzymes can make mistakes in base - pairing. Also, environmental factors can cause errors during replication.
For Question 8: In prokaryotes, DNA is usually circular and located in the cytoplasm in a region called the nucleoid. There is less associated protein. In eukaryotes, DNA is linear, located in the nucleus, and is tightly associated with histone proteins to form chromatin.

Answer:

Question 7: Yes, errors happen during DNA replication.
Question 8: Prokaryotic DNA is usually circular, in the cytoplasm, and has less associated protein; eukaryotic DNA is linear, in the nucleus, and tightly associated with histones to form chromatin.