Question

1. Sketch and explain the structure of DNA and various types of RNA.​

Answer 1

Structure of DNA

DNA (deoxyribonucleic acid) is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base.

-The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).

-To fit inside cells, DNA is coiled tightly to form structures we call chromosomes.

-The structural unit of DNA is genes.

Various types of RNA.

There are mainly three types of RNA namely,

1. Messenger RNA (mRNA)

2. Transfer RNA (tRNA)

3. Ribosomal RNA (rRNA)