Sketch and explain the structure of DNA and various types of RAN
Answers
DNAis double stranded molecule made up of deoxyribose sugar (pentose sugar),phosphate group and nitrogen bases. DNA is the nucleic acid which stores and transfers genetic information necessary for the development of new cells or organisms.
Structure of DNA:X-ray crystallographic studies have shown that DNA is a right handed double helical structure discovered by James Watson and Francis Crick in 1953. DNA is made of repeated nucleotides. Nucleotides are made up of pentose sugar, phosphate group and nitrogen bases (Adenine, Thymine, Cytosine, Guanine). DNA runs in 5'-3' orientation. These two strands run antiparallel to each other. The double strands of DNA coil upon each other to form a helical staircase.
RNAis single stranded molecule made up of ribose sugar (pentose sugar), phosphate group and nitrogen bases (Adenine, Uracil, Guanine and Cytosine). RNA codes for amino acids. It also acts as a messenger between DNA and ribosomes during the process of photosynthesis.
Structure of RNA:RNA occurs in three forms namely, mRNA, tRNA and rRNA.
mRNAis the messenger RNA is a single stranded RNA made up of 1000 nuclotides which carries genetic code from DNA in the nucleus to the ribosomes, the sites of protein synthesis.
rRNA is a large and complex double helical structures. These are attached to ribosomes during initiation of protein synthesis.
t-RNAare small molecules made up of about 80 nucleotides. tRNA act as carriers of amino acids from the cytoplasm to the sites of protein synthesis, the ribosomes.
DNA is double stranded molecule made up of deoxyribose sugar (pentose sugar),phosphate group and nitrogen bases. DNA is the nucleic acid which stores and transfers genetic information necessary for the development of new cells or organisms.
Structure of DNA:X-ray crystallographic studies have shown that DNA is a right handed double helical structure discovered by James Watson and Francis Crick in 1953. DNA is made of repeated nucleotides. Nucleotides are made up of pentose sugar, phosphate group and nitrogen bases (Adenine, Thymine, Cytosine, Guanine). DNA runs in 5'-3' orientation. These two strands run antiparallel to each other. The double strands of DNA coil upon each other to form a helical staircase.
RNAis single stranded molecule made up of ribose sugar (pentose sugar), phosphate group and nitrogen bases (Adenine, Uracil, Guanine and Cytosine). RNA codes for amino acids. It also acts as a messenger between DNA and ribosomes during the process of photosynthesis.
mRNAis the messenger RNA is a single stranded RNA made up of 1000 nuclotides which carries genetic code from DNA in the nucleus to the ribosomes, the sites of protein synthesis.
rRNA is a large and complex double helical structures. These are attached to ribosomes during initiation of protein synthesis.
t-RNAare small molecules made up of about 80 nucleotides. tRNA act as carriers of amino acids from the cytoplasm to the sites of protein synthesis, the ribosomes.