EVERYDAY SCIENCE

Detailed explanation-1: -Although classified as prokaryotes, bacteria, like other living organisms, possess DNA. Rather than the double stranded helix found in humans, bacteria have a single strand of circular DNA.

Detailed explanation-2: -Bacteria have both RNA and DNA. The bacteria’s genomic chromosome is composed of DNA, as are any extrachromosomal plasmids. The RNAs may be transcripts (i.e. templates for the translation of proteins) or untranslated elements such as ribosomal RNA or small RNAs involved in transcriptional regulation.

Detailed explanation-3: -Bacteria do not have a nucleus. Since the nucleus contains DNA, it can be concluded that bacteria do not contain DNA.

Detailed explanation-4: -In organisms such as humans, DNA is organised into structures called chromosomes inside a nucleus, a membrane-bound compartment within each cell. Bacteria lack a nucleus, and how bacterial DNA is organised has puzzled biologists for many years.

Detailed explanation-5: -Most bacteria have a genome that consists of a single DNA molecule (i.e., one chromosome) that is several million base pairs in size and is “circular” (doesn’t have ends like chromosomes of eukaryotic organisms).