GRE Subject Test: Biochemistry, Cell, and Molecular Biology : Help with Nucleoid Structure and Function

Study concepts, example questions & explanations for GRE Subject Test: Biochemistry, Cell, and Molecular Biology

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Example Questions

Example Question #1 : Help With Nucleoid Structure And Function

Which comparisons between eukaryotic and prokaryotic genomes are true?

Possible Answers:

Both genomes are replicated in the nucleus

Eukaryotic genes are often single and not in operons like prokaryotic genes

Prokaryotic genomes frequently have many transposable elements

All of these

Both types of genomes have large spacer regions between genes

Correct answer:

Eukaryotic genes are often single and not in operons like prokaryotic genes

Explanation:

The only true comparison of those listed is that eukaryotic genes are not often present in operons, like prokaryotes often have (think the frequently studied lac operon). Eukaryotes, not prokaryotes, have many transposable elements (a contributing factor to why our genomes are so large). Prokaryotes do not have large spacer regions between their genes, their genomes are often extremely compact. Prokaryotic cells lack nuclei, thus, DNA replication occurs in the cytosol.

All GRE Subject Test: Biochemistry, Cell, and Molecular Biology Resources

1 Diagnostic Test 201 Practice Tests Question of the Day Flashcards Learn by Concept
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