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प्रश्न
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उत्तर
Features of DNA:
(a) DNA consists of two strands which are spirally arranged around an axis. This is called a double helical arrangement.
(b) Each DNA strand is made up of nitrogenous bases, pentose sugar and phosphate.
(c) Sugars are pentose type; bases are adenine, guanine, cytosine and thymine.
(d) Both strands are connected with hydrogen bonds. There are two bonds between adenine and thymine and three bonds between guanine and cytosine.
(e) In the DNA, bases are inside and sugars are outside and two sugars are connected with phosphoric acid.
(f) Each DNA strand replicates and from each replicated DNA a new DNA is formed. This is called replication of DNA.
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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
Answer the following question in your own words.
Describe the structure of the DNA molecule.
State whether the following sentence is true or false:
Genes are arranged in a linear order on a chromosome.
____________ were used by Friedrich Miescher for his experiments.
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 |
In glycolysis how many NADH molecules are produced during the conversion of one glucose molecule to yield two molecules of pyruvate?
Decarboxylation is not involved in:
A nucleotide consists of three distinct components. Which of the following correctly identifies all three?
What is the diameter of the DNA double helix as proposed by Watson and Crick?
