Question

The nucleic acid base having two possible binding sites is

• A. thymine
• B. cytosine
• C. guanine
• D. adenine

Hint:

Nucleic acids, such as DNA and RNA, are composed of building blocks known as nucleotides. 

Answer 1

The Correct Option is C

Guanine has two possible binding sites.

Discover More From Chapter: Biomolecules

Answer 2

The Correct Answer is (C)

Real Life Applications

Guanine is one of the four nucleobases that make up DNA. It forms hydrogen bonds with cytosine on the other strand of DNA, which helps to hold the two strands together. 

• It is also one of the four nucleobases that make up RNA. It forms hydrogen bonds with cytosine, uracil, or adenine on the other strand of RNA, which helps to determine the order of the nucleotides in RNA.
• Guanine is found in ATP and GTP, which are molecules that store energy. These molecules are used by cells to power a variety of biological processes.
• It is also found in some proteins, where it plays a role in the structure and function of these proteins.

Question can also be asked as

• Which nucleic acid base can form two hydrogen bonds?
• What is the name of the nucleic acid base that can form two hydrogen bonds with cytosine, thymine, or uracil?
• How many binding sites does guanine have?
• What is the role of guanine in DNA and RNA?
• What are some other biological molecules that contain guanine?

Answer 3

The Correct Answer is (C)

Nucleic acids, such as DNA and RNA, are composed of building blocks known as nucleotides. These nucleotides consist of a sugar molecule, a phosphate group, and a nitrogenous base. Guanine is one of the four nitrogenous bases found in nucleic acids and is known for its unique characteristics. 

• Nucleic acids are made up of four nitrogenous bases: adenine (A), guanine (G), cytosine (C), and thymine (T) in DNA or uracil (U) in RNA.
• These bases play a crucial role in encoding genetic information.

Structure of Guanine

• Guanine is a purine base, characterized by a double-ring structure.
• It consists of a pyrimidine ring fused with an imidazole ring, resulting in a unique shape.

Binding Sites of Guanine

• Guanine has two possible binding sites: one for hydrogen bonding with cytosine (C) and another for hydrogen bonding with uracil (U) in RNA or thymine (T) in DNA.
• This pattern of hydrogen bonding between bases forms the basis of the complementary base pairing in DNA and RNA.

Complementary Base Pairing

• Complementary base pairing refers to the specific pairing of nitrogenous bases in nucleic acids.
• In DNA, guanine forms hydrogen bonds with cytosine, while in RNA, guanine pairs with either cytosine or uracil.

Importance of Complementary Base Pairing

• Complementary base pairing plays a vital role in the stability and replication of nucleic acids.
• The hydrogen bonds between guanine and cytosine or guanine and uracil/thymine ensure the fidelity of DNA replication and the accurate transmission of genetic information.

Guanine's ability to form two hydrogen bonds allows it to participate in various biological processes, including DNA replication, transcription, and translation.

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