Here are the answers to your questions:
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What is the term for a section of a DNA molecule that codes for proteins?
Answer: gene -
Eukaryotic chromosomes tend to be much larger than prokaryotic chromosomes. In order to package these large chromosomes into the nucleus, which family of proteins are used by the cell?
Answer: histones -
Which of the following choices correctly compares prokaryotic and eukaryotic chromosomes?
Answer: Prokaryotes tend to only have one chromosome while eukaryotes have many. -
Which answer choice below correctly describes the structure of DNA?
Answer: A sugar-phosphate backbone with nitrogen bases in the middle forming a double helix. -
Chromosomes in eukaryotes are made of DNA wrapped around proteins. What is the combination of DNA and protein called?
Answer: nucleosomes (Note: Although histones are a type of protein in this context, the term for the combination itself is nucleosomes, which refers to the basic unit formed by DNA wrapped around histone proteins.)