Question

40. Which of the following are characteristics of prokaryotic organisms?

    1. they are unicellular and most of them are surrounded by a cell wall.

    2. they are highly compartmentalized and have an endomembrane system.

    3. their cells possess a nucleus.

    4. they display only aerobic heterotrophy metabolism.

    5. they include organisms with unicellular complex multicellular bodies or unicellular

       forms.

41. Which of the following are unique in that they fix CO2 as their sole carbon source?

    1. organotrophs and iron oxidizers

    2. photoheterotrophs and chemiolithotrophs

    3. photoautotrophs and lithotrophs

    4. heterotrophs and methanogens

    5. methanogens and photoheterotrophs

Please explain the answers, thank you very much

Answer 1

Question 1

Option 1:-True

Reason :- All the prokaryotic organism are single cellular.the organism having prokaryotic cell are called prokaryotes. example :- archaebacteria and eubacteria. The phospholipid bilayer and the plasma membrane protects the cell from outside environment and maintain the cell integrity.

Option B:-False

Reason :- The prokaryotes donot posses endomemberane system for protein synthesis and protein sorting .

Option C:- False

Reason :- The prokaryotes lack memberane bound organelles like mitochondria, endoplasmic reticulum, nucleus, golgi body etc.

Option D:-False

Reason :- Prokaryotes possess wide types of respiration:- facultative aerobes, obligate aerobes, facultative anaerobes , obligate anaerobes.

Option E :- False

Reason :-​​​​​​-Prokaryotes are always unicellular whereas the eukaryotes can be unicellular and multicellular both .