Question

Differentiate between the followings:
(a)Repetitive DNA and Satellite DNA
(b)mRNA and tRNA
(c)Template strand and coding strand

Answer 1

(a) Repetitive DNA and satellite DNA

| Repetitive DNA | Satellite DNA
---|---|---
1. | Repetitive DNA are DNA sequences that contain small segments which are repeated many times. | Satellite DNA are DNA sequences that contain highly repetitive DNA.

(b) mRNA and tRNA

| mRNA | tRNA
---|---|---
1. | mRNA or messenger RNA acts as a template for the process of transcription. | tRNA or transfer RNA acts as an adaptor molecule that carries a specific amino acid to mRNA for the synthesis of polypeptide.
2. | It is a linear molecule. | It has clover leaf shape.

(c) Template strand and coding strand

| Template strand | Coding strand
---|---|---
1. | Template strand of DNA acts as a template for the synthesis of mRNA during transcription. | Coding strand is a sequence of DNA that has the same base sequence as that of mRNA (except thymine that is replaced by uracil in DNA).
2. | It runs from 3' to 5'. | It runs from 5'to 3'.