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RNA Biology Overview

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Questions and Answers

Which of the following is true about MiRNAs?

They are only found in prokaryotic cells.

They control gene expression by binding to DNA.

MiRNAs are involved in RNA interference.

They are noncoding RNAs. (correct)

What is the function of Long noncoding RNAs like Xist?

Break down proteins in the proteasome.

Inactivate the X chromosome in females. (correct)

Initiate translation in eukaryotic cells.

Control gene expression by splicing RNA.

What is the significance of the 'wobble position' in codons?

Determines the stop codon on mRNA.

Allows for multiple codons to specify the same amino acid. (correct)

Prevents mutations during DNA replication.

It indicates the start codon in translation.

Which of the following antibiotics blocks the peptidyl transferase reaction on ribosomes?

Chloramphenicol Signup and view all the answers

'Transitions' in point mutations involve changes between which nucleotides?

Guanine to adenine Signup and view all the answers

'Missense mutations' result in:

Change to a different protein. Signup and view all the answers

'Germ-line cells' give rise to:

Gametes. Signup and view all the answers

'Signal transduction' is the process of:

Converting signals into cellular responses. Signup and view all the answers

'SNPs' cause polymorphism by:

'Single nucleotide substitutions.' Signup and view all the answers

'Proteasomes' in eukaryotic cells are responsible for:

Breaking down proteins. Signup and view all the answers