Question

Which of the following is present in a prokaryotic cell?

(A) mitochondrion

(B) ribosome

(C) nuclear envelope

(D) chloroplast

Short answer

(A) The option “mitochondrion” is incorrect.

(B) The option “ribosomes” is correct.

(C) The option “nuclear envelope” is incorrect.

(D) The option “chloroplast” isincorrect.

Step-by-step solution

Prokaryotic and eukaryotic cell 

Prokaryotic and eukaryotic cells are different in several aspects. The first difference is that prokaryotes are comparatively straightforward and do not contain a nucleus but a nucleoid region. Other organelles that are distinct and membrane-bound are also absent in the prokaryotes. It includes bacteria and archaea groups.

Explanation for option (A)

Mitochondria or powerhouse units are concerned with the production of energy-rich molecules called ATP. This ATP is used in the various activities of the cell. Eukaryotic cells contain this sausage-shaped organelle, and it is double membrane-bound.

Thus, the option is incorrect.

Explanation for option (B)

The ribosome is an organelle seen in both prokaryotic and eukaryotic organisms as it plays a central role in protein synthesis. Every cell requires protein for normal functioning and survival.

Thus, the option is correct.

Explanation for option (C)

The nuclear envelope is the characteristic of a eukaryotic cell. The nucleus of the eukaryotic cell is separated from the cytoplasm by this membrane. It is not observed in the case of prokaryotic cells.

Thus, the option is incorrect.

Explanation for option (D)

Chloroplast is the double-membrane organelle that is observed in the case of plant cells and is concerned with photosynthesis. This organelle is absent in animal cells.

Thus, the option is incorrect.