Question

Study the given diagram of bacterial cell and answer the following questions.
(1)
(2)
(3)
(a) Label the parts marked 1, 2, and 3
(1)
(b) Which structure present in the region 2 of a living cell bear genes?
(1)
(c) How nuclear region of a bacterial cell and nuclear region of an animal cell is different from each
other?
(1)
(d) Can a single cell live independently on its own ? Give one example of single celled organism. (1)​

Answer 1

Answer:

1-plasma membrane

2-nucleeoid

3-cell wall

Answer 2

Based on the attached diagram of bacterial cell:

(a) 1. cell

2. Plasma membrane

3. Nucleoid

(b) Chromatin fibres is present in the region 2 i.e., nucleoid region of a living cell bearing genes.

(c)The nuclear membrane is missing because it lacks a clearly defined nucleoid, or portion of the nucleus in case of bacterial cell whereas animal cell has a nuclear region that is clearly delineated and is encircled by a nuclear membrane.

(d) Yes, a single cell can live independently. Example: Amoeba, Paramecium.

• Prokaryotic unicellular creatures make up bacteria.
• Compared to eukaryotic cells, they have a fairly straightforward cell arrangement.
• Additionally, they lack any cells that are membrane-bound, like a nucleus.
• They do, however, have nuclei, which are parts of cells that contain hereditary material (DNA or RNA).
• It is composed of water, enzymes, nutrients, waste products, and gases, and has a viscosity similar to gel.
• Cell components like ribosomes, chromosomes, and plasmids can be found within it.
• All of the cytoplasm's elements are enclosed within the cell membrane.
• Bacteria lack a membrane-enclosed nucleus, in contrast to eukaryotic (real) cells.
• The cell wall in bacteria creates a rigid framework around the cell that is always the same thickness, giving the cell its distinctive shape (rod, coccus, or spiral).
• The plasma (cytoplasmic) membrane, which is typically tightly adhered to the wall layer, is located inside the cell wall (or rigid peptidoglycan layer).

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