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 for Correct option:

1. Ribosomes are circular particles that are associated with the Endoplasmic reticulum's double membrane.
2. All of the others are organelles with two membranes.
3. The small ribosomal subunits, which read the RNA, and the bigger subunits are the two major components of ribosomes.
4. These are used to connect amino acids to form a polypeptide chain.
5. The messenger ribonucleic acid (mRNA) that this cell organelle binds to carries information that is decoded by the mRNA's nucleotide sequence.
6. They enter the ribosome at the acceptor site and transfer RNAs (tRNAs) that contain amino acids.
7. Once it is attached, it continues to add amino acids to the tRNA's expanding protein chain.

Explanation for Incorrect option:

Option B:

1. Golgi Apparatus packages proteins into membrane-bound vesicles inside the cell before they are delivered to their destination, and it is part of the endomembrane system in the cytoplasm.

Option C:

1. Chloroplasts, like mitochondria, have two membranes surrounding them.
2. Small organic molecules can pass through the outer membrane, while the inner membrane is less permeable and densely packed with transport proteins.

Option D:

1. The nuclear membrane is a double layer that surrounds the nucleus of the cell, which houses the chromosomes.
2. The nuclear membrane separates the chromosomes from the cytoplasm and other constituents of the cell.

Final answer: Organelle without a cell membrane is the ribosome.