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Molecular Biology: Nucleic Acids Structure [BIO 206]

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Molecular Biology: Nucleic Acids Structure [BIO 206]

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Questions and Answers

What are the small, circular, extrachromosomal DNA molecules found in most species of bacteria called?

Plasmids (correct)

Single-stranded DNA molecules

Linear DNA molecules

Mitochondrial DNA

What percentage of the total cellular DNA does mitochondrial DNA (mtDNA) form?

2 to 5%

0.1 to 0.5%

0.3 to 1% (correct)

1 to 2%

How many base pairs (bp) does human mtDNA contain?

5,000 bp

15,000 bp

10,000 bp

16,569 bp (correct)

What is the main function of the proteins encoded by mitochondrial DNA?

Oxidative phosphorylation Signup and view all the answers

How is mitochondrial DNA (mtDNA) inherited?

Maternally inherited Signup and view all the answers

What is the process called when the two strands of DNA separate due to heating?

Denaturation Signup and view all the answers

What is the name of the temperature that produces a loss of 50% of the DNA helical form?

Melting point Signup and view all the answers

Which of the following factors decreases the DNA melting temperature (Tm)?

More alkaline medium Signup and view all the answers

Which type of viruses have single-stranded DNA molecules?

Only a few viruses Signup and view all the answers

What happens to the absorption of UV light and the viscosity of DNA during the denaturation process?

Absorption of UV light increases, and viscosity decreases Signup and view all the answers