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प्रश्न
Label the parts of the DNA in the diagram given below. Explain the structure briefly.
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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
Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule
State whether the following sentence is true or false:
The two DNA chains are parallel to each other.
Choose the correct answer :
Spirally coiled double strands are observed in ____________
Choose the correct answer :
Which of these is not present in DNA?
If a DNA has 20 Adenine and 30 cytosine bases. What will be the total number of purine bases in the given sample?
The ______ units form the backbone of the DNA.
Down’s syndrome is a genetic condition with 45 chromosomes.
How is the structure of DNA organized?
What is the biological significance of DNA?
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 |
