All Students Notes

Question: How do DNA and RNA differ in structure?  Answer Structural difference  between DNA and RNA  DNA   1. It has deoxyribose sugar 2. It has following bases:     a. Adenine     b. Guanine     c. Cytosine     d. Thiamine  3. It is double stranded and has double helix  RNA  1. It has ribose sugar  2. It has following bases:      a. Adenine      b. Guanine      c. Cytosine      d. Uracil  3. It is single stranded and does not form double helix.  Question: Name two kinds of nucleic acid  Answer. i. Deoxyribose nucleic acid ii. Ribose nucleic acid  Question: Write difference between DNA and RNA  Answer Question What is the sugar unit in DNA?  Answer: Deoxyribose sugar Question What is the sugar found in DNA?  Answer: Deoxyribose sugar  Question ...

NUCLEIC ACIDS Question: What are Nucleic acids? Explain.  Answer : The nitrogen containing compounds which were first discovered in pus cells of infected wounds are called nucleic acids. The overall, nucleic acids store and transmit genetic information and play a vital role for all kind of life. These are long chain molecules made of large number of nucleotides. Each nucleotide consists of three components: i. Nitrogenous base ii. Pentose sugar iii. Phosphate group. There are two main classes of nucleic acids which are: ribonucleic acid (RNA) and deoxyribonucleic acid DNA.  Deoxyribonucleic Acid (DNA)  DNA structure was discovered by J. Watson and F. Crick in 1953.  It exists as double stranded and forms double helix.  Its strands are held together by hydrogen bonds.  It has deoxyribose sugar, phosphate unit and nitrogenous base.  It has thiamine as base.  It has genetic information which passes from generatio...