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प्रश्न
Label the parts of the DNA in the diagram given below. Explain the structure briefly.
उत्तर
DNA is the hereditary material as it contains genetic information. DNA is a large molecule, consisting of millions of nucleotides. Each nucleotide consists of three compounds.
Nucleotides in a DNA
(a) A sugar molecule – Deoxy Ribose sugar
(b) A nitrogenous base [Purines and Pyrimidines]
- Purines (Adenine and Guanine)
- Pyrimidines (Cytosine and Thymine)
(c) A phosphate group Nucleoside and Nucleotide:
Nucleoside = Nitrogen base + sugar
Nucleotide = Nucleoside + Phosphate
The nucleotides are formed according to the purines and pyrimidines present in them.
APPEARS IN
संबंधित प्रश्न
Correct the following statement by changing the underlined word:
Nitrogen bonds are present between the complementary nitrogenous bases of DNA.
Fill in the blank:
DNA replicates in the ______ of the cell cycle.
State whether the following sentence is true or false:
Each spiral of the DNA has 12 nucleotides.
Match the Column I with Column II and select the correct option.
| List-I | List-II | ||
| i. | Ribozyme | a. | Lac operon |
| ii. | Friedrich Miescher | b. | DNS as genetic material |
| iii. | Alfred Hershey and Martha Chase | c. | Catalytic RNA molecule |
| iv. | Francois-Jacob | d. | DNA is acidic substance |
Through which of the following experiments DNA was proved to be the genetic material in E. coli and bacteriophage?
A lysogen is a ______.
Which of the following is not a component of a nucleotide?
