Advertisements
Advertisements
प्रश्न
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Correct the following statement if there is any mistake.
The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine.
Fill in the blanks:
There are two nucleic acids ______ and ______.
Choose the correct answer:
This structure is not present in all chromosomes ___________
Choose the correct answer:
Sex chromosomes in man are _____________
How many codons are needed to specify three amino acids?
Multiple Choice Question:
Place the following event of translation in the correct sequence
i. Binding of met-tRNA to the start codon.
ii. Covalent bonding between two amino acids.
iii. Binding of second tRNA.
iv. Joining of small and large ribosome subunits.
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.
Which of the following enzyme catalyse the removal of nucleotides from ends of DNA?
