Which Statement Is False Concerning Ribosomes and Their Components

question 74

Multiple Choice

Which statement is false concerning ribosomes and their components?

• A)All ribosomes have two subunits of unequal size.
• B)The genes for eukaryotic rRNA occur as tandem arrays of hundreds of copies.
• C)The 30S and 50S ribosomal subunits of E.coli combine to generate an 80S subunit.
• D)Sequences exist in prokaryotic and eukaryotic rRNA that are so similar,they likely derive from a common ancestor.

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Definitions:

Codon

Sequence of three nucleotides in mRNA or DNA that codes for a specific amino acid in a protein.

mRNA

Messenger RNA, a form of RNA that carries genetic information from the DNA to the ribosome, where it can be translated into a protein.

Nucleotides

Organic molecules that serve as the building blocks of nucleic acids like DNA and RNA.

Introns

Non-coding sections of an RNA transcript, or the DNA encoding it, that are spliced out before the mRNA molecule is translated into protein.