Definition

1. Noun:
   • A nucleoside component of DNA: Guanosine is a fundamental building block of nucleic acids, specifically a nucleoside formed from the base guanine and the sugar deoxyribose in DNA. In its more common form as a component of RNA, it is paired with ribose sugar.

Usage Examples

• Noun:
  • The structure of DNA includes four nucleosides: deoxyadenosine, deoxythymidine, deoxycytidine, and deoxyguanosine.
  • Guanosine triphosphate (GTP) is a crucial molecule for energy transfer in cellular processes.
  • Researchers studied the role of guanosine in the genetic code.

Advanced Usage

• "Guanosine diphosphate (GDP)": A nucleotide derivative involved in metabolic pathways and signal transduction.
  • GDP is formed when GTP is hydrolyzed during a G-protein cycle.
• "Guanosine monophosphate (GMP)": A nucleotide that serves as a monomer in RNA and as a regulatory molecule.
  • GMP can act as a flavor enhancer in some foods.

Variants and Related Words

• Deoxyguanosine (noun): The specific form of guanosine where the sugar component is deoxyribose, as found in DNA.
  • The chemical difference between guanosine and deoxyguanosine is the absence of an oxygen atom on the sugar.
• Guanine (noun): The purine base that pairs with cytosine and is a constituent of guanosine.
  • Guanine is one of the four main nucleobases found in nucleic acids.

Synonyms

• Deoxyguanosine (when referring specifically to the DNA form).
• G nucleoside (a less common, general biochemical term).

Notes on Meaning

• The reference context specifies guanosine as "composed of guanine and deoxyribose," which technically defines deoxyguanosine, the DNA form. In broader biochemical usage, "guanosine" most commonly refers to the ribonucleoside (guanine + ribose), which is a component of RNA. The DNA form is typically specified with the prefix "deoxy-". This word is primarily used in scientific contexts like biochemistry, genetics, and molecular biology.

Noun

1. a nucleoside component of DNA; composed of guanine and deoxyribose