EVERYDAY SCIENCE

SCIENCE

VIRUS AND BACTERIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Contain a nucleoid region made up of DNA
A
Viruses
B
Bacteria
C
Both viruses and bacteria
D
Neither viruses or bacteria
Explanation: 

Detailed explanation-1: -The nucleoid is a chromatin-dense area within the cytoplasm and contains the bacterial DNA, associated proteins and RNA that are responsible for controlling the bacteria’s activity and reproduction (Fig.

Detailed explanation-2: -The nucleoid region is found in the cytoplasm of prokaryotic cells. It contains DNA, sometimes several copies of it, along with proteins, including enzymes, and RNA.

Detailed explanation-3: -The bacterial genome is present in the cell within a complex structure, the nucleoid. The nucleoid contains the genomic DNA, and molecules of RNA and proteins. The main proteins of the nucleoid are: RNA polymerase, topoisomerases and the histone-like proteins: HU, H-NS (H1), H, HLP1, IHF and FIS.

Detailed explanation-4: -The nucleoid is the space within a prokaryotic cell where the genetic information, called the genophore, is found. Prokaryotes are divided into bacteria and archaea, which are both unicellular organisms that contain no membrane-bound organelles.

Detailed explanation-5: -The DNA in prokaryotes is contained in a central area of the cell called the nucleoid, which is not surrounded by a nuclear membrane. Many prokaryotes also carry small, circular DNA molecules called plasmids, which are distinct from the chromosomal DNA and can provide genetic advantages in specific environments.

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