Exploring DNA Sequencing and Biomolecules

What is the first step in DNA sequencing?

• Separating DNA fragments by size

• Labeling nucleotides with fluorescent tags

• Amplifying the DNA sample using PCR

• Using gel electrophoresis

What is the purpose of adding nucleotides during PCR?

• To terminate the DNA strand

• To provide a substrate for the growing strand

• To label the DNA fragments

• To separate the DNA strands

How does a dideoxynucleotide differ from a regular nucleotide?

• It is larger in size

• It has an extra oxygen group

• It lacks an oxygen group, preventing strand elongation

• It has a different base

What happens when a dideoxynucleotide is incorporated into a growing DNA strand?

• The strand is separated by size

• The strand becomes fluorescent

• The strand is terminated

• The strand continues to elongate

How are different dideoxynucleotides labeled?

• With different shapes

• With different sizes

• With different bases

• With different colors of fluorescent tags

What is the result of incorporating fluorescently labeled dideoxynucleotides into DNA strands?

• All strands are the same length

• Strands of varying lengths are created

• Strands are separated by size

• Strands are terminated at the same point

What is the purpose of gel electrophoresis in DNA sequencing?

• To terminate DNA strands

• To separate DNA fragments by size

• To label DNA fragments

• To amplify DNA fragments

How does a computer analyze the DNA sequence after gel electrophoresis?

• By terminating the DNA strands

• By reading the fluorescent labels

• By measuring the size of DNA fragments

• By amplifying the DNA fragments

What does a blue fluorescent label indicate in the DNA sequence?

• A nucleotide C

• A nucleotide G

• A nucleotide T

• A nucleotide A

What is the final output of the DNA sequencing process?

• A set of DNA fragments

• A gel electrophoresis image

• A complete DNA sequence

• A set of fluorescent labels