Question

How many of the following organisms have nuclear membranes?
Mycoplasma, Blue-green algae , Fungi, Bacillus, Yeast, Purple photosynthetic bacteria, E.coli, Chlamydomonas
A. 4
B. 3
C. 5
D. 2

Answer 1

The nuclear membrane forms an envelope around the contents of the nucleus and is known as the nuclear envelope. In prokaryotes, DNA is exposed and packaged differently in the cytoplasm. They are often called gonophores, nucleoids. There are no layers of the nuclear envelope, nucleolus, nucleolus and histone chromatin in Prokaryotic cells. Eukaryotic cells (= eukaryotic cells) have a typical nucleus with a nuclear membrane.

Complete answer:
Prokaryotic cells-Prokaryotic cells lack bound nuclei and other cell organelles. As a rule, it consists of a central nuclear component - DNA and RNA molecules, and the main proteins are surrounded by a cytoplasmic matrix. In other words, the genetic material is on a single chromosome containing circular double strands of DNA. Here, the main proteins-histones (characteristic of eukaryotic cells) are lost together with the cell nucleus and mitotic devices.
Eukaryotic cell-The cell size is relatively larger. Eukaryotic cells have two membranes. The flagellum, if present, has 11 cords with axons and membrane differentiation. There is an organized nucleus. It is distinguished by a nuclear envelope, chromatin, one or more nucleoli, and nucleoplasm. Nuclear DNA is linked to histones. Nuclear DNA is linear. Complementary nuclear DNA is usually round.

Mycoplasma-Prokaryote
Blue green algae-Prokaryotic
Fungi- Eukaryote
Bacillus-Prokaryote
Yeast-Unicellular Eukaryote
Purple photosynthetic bacteria-Prokaryote
E.coli-Prokaryote
Chlamydomonas-Eukaryote

Only Chlamydomonas, fungi and yeast which is also a fungi are Eukaryotes so the correct option is B.

Note:
In the cytoplasm of prokaryotes, there are no clearly defined cytoplasmic organelles such as endoplasmic reticulum, chloroplasts, mitochondria, Golgi complex, centrosomes, etc. The walls of the species consist only of carbohydrates and amino acids. The plasma membrane, located under the cell wall, is usually formed in the cytoplasmic matrix and acts as a mitochondrial membrane that carries respiratory enzymes. Some important prokaryotes are bacteria, spirochetes, spirochetes, rickettsia, blue green algae, mycoplasmas, or PPLO. They contain only chromosomes made up of double-stranded DNA molecules. In Eukaryotes a small amount of DNA is also present in mitochondria and Chloroplast.