Question

Cyanosis is absent in which of the following?
A. Diatoms.
B. Eubacteria.
C. Algae.
D. Plantae

Answer 1

Hint: Cyanosis: It is a movement of liquid components of cytoplasm within the cells.
It is also known as cytoplasmic streaming/ protoplasmic streaming.
It is an Energy consuming process which helps in distribution of nutrients throughout the cell.

Complete answer: In order to solve this question, we need to know more about cyanosis.
Cyanosis is also known as cytoplasmic streaming.
It is defined as the movement of liquid components of the cytoplasm within the cells without deforming the cells.
This cytoplasmic streaming or cyanosis helps in distribution and movement of nutrients and other essential components within the cells.
 It is mainly observed in large plants and animals.
Diatoms are the chrysophyta comes in an algae group in which the movement or sharing of nutrients occurs inside the cell. So, cyanosis is present in diatoms
Algae as we know belong to the kingdom protista.
It is an aquatic photosynthetic organism.
To carry out the process of photosynthesis movement of chloroplast occurs within the cells. So, cyanosis is also present in algae.
Plants cells consist of chloroplast.
Movement of chloroplast occurs so that chloroplast can trap as much as sunlight and convert it into chemical energy to carry out the process of photosynthesis. So, cyanosis is also present in plantae.
Eubacteria do not possess the cyanosis activity because the cytoplasm of eubacteria is of gel like.

So, the correct option is option B Eubacteria.

Note: Eubacteria are the prokaryotic organisms. They are devoid of membrane bound nuclei.
Cell wall of eubacteria contains peptidoglycan. They are cocci, bacilli or spiral in shape.