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Genomes in Viruses, Bacteria, and Eukaryotes

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Genomes in Viruses, Bacteria, and Eukaryotes

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Questions and Answers

What is the overall structure of bacterial DNA called?

Cytoplasm

Chromosome

Plasmid

Nucleoid (correct)

Which type of DNA sequences are scattered throughout the eukaryotic genome?

Alu elements (correct)

Introns

Satellite DNA

Long interspersed elements (LINES)

What type of sequences show up as bands of different densities in density gradient centrifugation?

Exons

Alu elements

Long interspersed elements (LINES)

Satellite DNA (correct)

What is the term for sequences that allow many copies of proteins to be made?

Duplication of genes Signup and view all the answers

Which type of DNA sequences have lower densities in density gradient centrifugation?

AT rich sequences Signup and view all the answers

What is the term for the sequences that do not encode genes and are removed by splicing when mRNAs are processed?

Introns Signup and view all the answers

What is the purpose of alternative splicing in RNA transcripts?

Generate different variants of proteins Signup and view all the answers

What is the role of histones in chromatin structure?

Form a nucleosome core around which DNA wraps Signup and view all the answers

How do modifications of histones regulate gene expression?

By changing the strength of DNA-histone interactions Signup and view all the answers

Which process involves DNA condensing into chromosomes?

Cell division Signup and view all the answers

What is the main function of H1 in chromatin structure?

Associating with linker DNA between nucleosomes Signup and view all the answers

Why is DNA replication considered semiconservative?

The new DNA molecule is a combination of old and new strands Signup and view all the answers