Question

Organelle without a cell membrane is

• A. Ribosome
• B. Golgi apparatus
• C. Chloroplast
• D. Nucleus

Answer 1

The correct option is A

Ribosome

The correct option is A:

Explanation of the correct option:

1. Ribosome are round small organelle that are seen in the cytoplasm or seen associated with endoplasmic reticulum.
2. They are made up of ribonucleic acid and proteins.
3. They doesn’t have a membrane, it is present in both eukaryotes and prokaryotes.
4. The main function is protein synthesis.

Explanation of the incorrect options:

Option B:

Golgi apparatus

1. Golgi apparatus are membrane bound cell organelle with sacs, tubules, vesicles which helps to secrete biochemical compounds.
2. It have thin and curved structures called cisternae.
3. In plants it is called dictyosomes.
4. The main functions are repair and synthesis of cell membrane, cell wall.
5. Lysosome are formed from this.
6. Storage, modification and packaging of biochemical compounds.

Option C:

Nucleus

1. Is a dense body seen in the cytoplasm, which contains the genetic material.
2. RBC and sieve elements lack nucleus. It has a double layered nuclear envelope which separates cytoplasm and nucleoplasm.
3. Other components of nucleus is nucleolus and chromatin material.
4. It is called the control center of the cell.

Option D:

Plastids

1. Are double membrane bound cell organelles found in plants which helps in synthesis and storage of certain chemicals.
2. Chromoplast- are coloured plastids.
3. Mainly two types of chromoplast non-green photosynthetic chromoplast and green photosynthetic chromoplast called chloroplast.

Thus, Organelle without a cell membrane is ribosome.