Prokaryotic Cell Structure: The Nucleoid
Prokaryotic cells, like bacteria, lack a membrane-bound nucleus. Instead, their genetic material, which consists of nucleic acids (DNA), is located in a specific region within the cytoplasm.
Identifying the Genetic Region
- The central cytoplasmic region containing the cell's genetic material (nucleic acids) in prokaryotes is called the Nucleoid.
- This region is not enclosed by a membrane, distinguishing it from the nucleus found in eukaryotic cells.
- The term 'Nucleus' refers to the membrane-bound organelle containing DNA in eukaryotic cells.
- 'Nucleolus' is involved in ribosome synthesis and is found within the eukaryotic nucleus.
- 'Plastid' refers to organelles in plants and algae, not found in prokaryotes.
Therefore, the correct term for the nucleic acid-containing cytoplasmic region in a prokaryotic cell is the Nucleoid.
Important Questions from Cell Structure
A group of ribosomes attached to mRNA is known as :
Within the nucleus of eukaryotic cells, which of the following structures contains the tightly coiled genetic material?
Chromosomes are composed of DNA and:
Bacteria have an undefined nuclear region which lacks a nuclear membrane and contains only DNA without proteins. Such a region is called:
Which of the following statements is/are correct?
I. Amoeba ingests its food with the help of pseudopodia.
II. Amoeba constantly changes its shape and position.
