Question

(i)
Which of the following characteristics do not occur in prokaryotic cells?
a. Cellular organisation
b. Oxygenic photosynthesis
c. Anaerobic respiration
d. Thylakoid membrane within chloroplast​

Answer 1

Answer:

The characteristic that does not occur in prokaryotic cells is a) cellular organisation.

Explanation:

• Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures.
• Prokaryotic photosynthetic organisms have infoldings of the plasma membrane for chlorophyll attachment and photosynthesis. It is here that organisms like cyanobacteria can carry out photosynthesis. Some prokaryotes can perform photosynthesis.
• Certain prokaryotes, including some species of bacteria and Archaea, use anaerobic respiration. For example, the group of Archaea called methanogens reduces carbon dioxide to methane to oxidize NADH.
• In prokaryotic cyanobacteria, thylakoids are found in the cytoplasm as an intracellular membrane system. Photosynthetic prokaryotes, which lack membrane-bound organelles, have invaginations of the cell membrane that serve a similar function as thylakoid membranes.