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Biology DNA Nucleotides

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@SolicitousLorentz

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Questions and Answers

What is the significance of three consecutive nucleotides in DNA?

They code for three complete proteins

They code for one complete protein

They code for one amino acid (correct)

They code for three amino acids

What does a codon in DNA typically specify?

Three amino acids

One amino acid (correct)

A nucleotide

A polypeptide chain

How many nucleotides form a single codon?

Two

Three (correct)

Four

Five

What is the basic unit of genetic code called that determines an amino acid?

Codon Signup and view all the answers

What happens if there is a change in a nucleotide in a codon?

It can alter the amino acid and possibly the protein's function Signup and view all the answers

What can be the consequence of a single base change in the DNA sequence?

Change in the amino acid sequence of the protein Signup and view all the answers

Which process can be directly affected by a change in a single DNA base?

Translation Signup and view all the answers

What is a possible result if the mRNA sequence is altered due to a DNA base change?

Production of a different protein Signup and view all the answers

How might a single nucleotide mutation in the DNA affect gene expression?

Changing the amino acid sequence in a protein Signup and view all the answers

Which of the following describes a potential impact of a DNA base change?

Change in the primary structure of a protein Signup and view all the answers

Study Notes

Biology Quiz: DNA and Amino Acids

A biology quiz question asks about the significance of three consecutive nucleotides in DNA
The possible answers relate to how these nucleotides code for amino acids or proteins
Three consecutive nucleotides in DNA are important for encoding specific genetic information
The correct answer is likely A: They code for one amino acid, as a sequence of three nucleotides (a codon) typically specifies one amino acid in protein synthesis

How DNA Base Changes Affect Protein Production

A single change in a DNA base can produce a different protein by altering the amino acid sequence.
This change in amino acid sequence can result in a protein with distinct properties or functions.
Note that changing the DNA base does not directly affect peptide bonds, mRNA production, or mRNA transport out of the nucleus.

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Description

This quiz tests your understanding of DNA structure and function, specifically the significance of three consecutive nucleotides in DNA coding for amino acids or proteins.