Question

Membrane bound organelles are _________ in prokaryotes.
A)Absent
B)Present
C)Chloroplasts
D)Mitochondria

Answer 1

Hint: Some membrane bound organelles are nucleus, Golgi apparatus, endoplasmic reticulum, plastids, mitochondria, lysosomes, etc which are mostly found in the cytoplasm of eukaryotic cells. Presence of single- or double membrane bound organelles is one of the most fundamental features of eukaryotic cells.

Complete answer:
Option A: Prokaryotic cells are the most primitive cell type which lacks any membrane bound internal structures. So, membrane bound organelles are absent in prokaryotes. This is the correct option.

Option B: Membrane bound organelles are present in eukaryotes, and not in prokaryotes. Therefore, this option is incorrect.

Option C: Chloroplasts are present only in plant cells and help them in photosynthesis by converting the light energy of the Sun into chemical energy in the form of sugar (glucose). Plant cells are certainly eukaryotes. Chloroplasts are not present in prokaryotic cells at all. Therefore, this option is incorrect.

Option D: Mitochondria are the powerhouse of eukaryotic cells. They provide the cells with energy by producing energy-rich ATP molecules. But they are not present in prokaryotes. Prokaryotic cells obtain energy using an electron transport system (ETS) in their plasma membranes. Therefore, this option is also incorrect.

Hence, the correct answer is option (A)

Note: 1)Cyanobacteria, bacteria, mycoplasma, etc are the most common examples of prokaryotes.
2)Prokaryotes lack membrane-enclosed nuclei. Hence their genetic information carrying single circular DNA is attached to the cell membrane and is in direct contact with protoplast. This supercoiled genetic material is known as nucleoid.