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DNA Structure and Function Quiz

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Questions and Answers

What is the primary organizational structure of chromosomal DNA?

Tightly wound coils held by histones

Loops held together by large protein rings (correct)

Linear strands without any folding

Random tangles of DNA

What are the two main types of chromatin described in the text?

Active and inactive chromatin

Condensed and decondensed chromatin

Euchromatin and heterochromatin (correct)

Transcribed and non-transcribed chromatin

What happens to chromosome loops when the genes within them are expressed?

They remain unchanged

They decondense or unwind (correct)

They condense further

They become more tightly wound

How are mitotic chromosomes described in the text?

Highly condensed Signup and view all the answers

How are mammalian interphase chromosomes organized in the nucleus?

They occupy discrete territories Signup and view all the answers

How are euchromatin and heterochromatin distributed in mammalian interphase chromosomes?

They are separated spatially Signup and view all the answers

What happens to chromosome loops when the genes within them are not expressed?

They remain unchanged Signup and view all the answers

Which of the following statements is true about chromosome loops?

They are the basic organizational unit of chromosomes Signup and view all the answers

What is the spatial relationship between euchromatin and heterochromatin in the nucleus?

They are separated Signup and view all the answers

Which of the following statements is not supported by the text?

Chromosome loops condense during gene expression Signup and view all the answers