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Chapter no. 02, nucleic acid
Nucleic acids store cellular growth and reproduction information. There are two types: DNA and RNA. A nucleotide is composed of a nitrogenous base, pentose sugar, and phosphate group. DNA contains deoxyribose and RNA contains ribose. Nitrogen bases plus pentose sugar make a nucleoside, and a nucleotide adds a phosphate group. Nucleotides can be mono, di, or polynucleotides. DNA is the hereditary material and contains specific sequences of nitrogenous bases that encode vast information used in gene expression through transcription and translation.
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Chapter no. 02, nucleic acid
- 1. Nucleic Acid Dr. AarabKhan Lund
- 2. Nucleic Acids • Nucleicacids are molecules that store information for cellular growth and reproduction • There are two types of nucleic acids: - deoxyribonucleic acid (DNA) -ribonucleic acid (RNA) • A nucleotide consists of a nitrogenous base, a pentose sugar and a phosphate group:
- 3.
- 5. Pentose Sugars • Thereare two related pentose sugars: - RNA contains ribose - DNA contains deoxyribose • The sugars have their carbon atoms numbered with primes to distinguish them from the nitrogen bases
- 6. Nucleosides and Nucleotides •Nitrogen base+Pentose Sugar =Nucleoside • Nitrogen base+Pentose Sugar+Phosphate group= Nucleotide
- 7. Types of Nucleotides •Mononucleotide • Dinucleotide • Polynucleotide
- 8. DNA (Hereditary material) •Griffith • None virulent bacteria->Virulent bacteria. • Hershy and Chase • Bacteriophage-DNA-Host-more phages. • All nucleotides of DNA, phosphate and deoxyribose sugars are always common but nitrogenous bases are different. • Each DNA has specific sequences of nitrogenous bases. It encodes vaste amount of information
- 11. Gene Expression • Transcriptionand Translation.
- 15. Continue • Initiation ofprotein synthesis occurs when a mRNA attaches to a ribosome.