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
Answer the following question in your own words.
Describe the structure of the DNA molecule.
Fill in the blank:
DNA replicates in the ______ of the cell cycle.
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 ____________
Multiple Choice Question
DNA structure was discovered by:
Multiple Choice Question:
In the RNA molecule, which nitrogen base is found in place of thymine?
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.
A DNA strand with the sequence AACGTAACG is transcribed. What is the sequence of the mRNA molecule synthesized?
Decarboxylation is not involved in:
