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प्रश्न
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
The three sketch (A, B and C) are intended to represent the replication of DNA.
What should be their correct sequence, starting with the first and ending with the last? ……
Answer the following question in your own words.
Express your opinion about the use of DNA fingerprinting.
Fill in the blank:
DNA replicates in the ______ of the cell cycle.
Choose the correct answer:
This structure is not present in all chromosomes ___________
Write the functional activity of the following structure:
DNA
New nucleotides are added and a new complementary strand of DNA is formed with the help of enzyme DNA polymerase.
What is the biological significance of DNA?
A DNA strand with the sequence AACGTAACG is transcribed. What is the sequence of the mRNA molecule synthesized?
Decarboxylation is not involved in:
