Question 1

What component of DNA serves as the genetic blueprint for an organism?

Accepted Answer

The sequence of nucleotides

Answer

The sugar-phosphate backbone

Answer

The helicase enzyme

Answer

The number of hydrogen bonds

Question 2

Which part of the nucleotide distinguishes one type of nucleotide from another in DNA?

Accepted Answer

The nitrogenous base

Answer

The phosphate group

Answer

The double helix

Answer

The sugar molecule

Question 3

What type of bond holds the two strands of DNA together in a double helix?

Accepted Answer

Hydrogen bonds

Answer

Covalent bonds

Answer

Peptide bonds

Answer

Ionic bonds

Question 4

Which of the following correctly describes the structure of DNA?

Accepted Answer

A double helix composed of two strands that run antiparallel

Answer

A triple helix with all strands oriented in the same direction

Answer

Two parallel strands with equal base pairing

Answer

A single strand that coils into a sphere

Question 5

What is the function of the enzyme DNA polymerase during DNA replication?

Accepted Answer

To synthesize new DNA strands complementary to the template strands

Answer

To unwind the DNA double helix

Answer

To join Okazaki fragments

Answer

To initiate transcription of genes

Question 6

What are the building blocks of DNA?

Accepted Answer

Nucleotides

Answer

Fatty acids

Answer

Monosaccharides

Answer

Amino acids

Question 7

Which pair of nitrogenous bases in DNA forms hydrogen bonds with each other?

Accepted Answer

Adenine and Thymine

Answer

Thymine and Cytosine

Answer

Adenine and Cytosine

Answer

Guanine and Cytosine

Question 8

What is the role of the phosphate group in the structure of DNA?

Accepted Answer

It connects nucleotides together to form the DNA backbone

Answer

It binds to histones for packaging

Answer

It encodes genetic information

Answer

It creates hydrogen bonds between bases

Question 9

What term describes the specific pairing of nitrogenous bases in DNA?

Accepted Answer

Complementary base pairing

Answer

RNA transcription

Answer

Gene expression

Answer

Semi-conservative replication

Question 10

Which of the following statements about DNA structure is true?

Accepted Answer

DNA is a double-stranded helix with antiparallel strands

Answer

DNA has a triple helix structure composed of three strands

Answer

DNA strands are parallel and run in the same direction

Answer

DNA is a single strand with random coiling

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