Question

Gram negative monerans lacking cell wall show reproduction by
A. Elementary bodies
B. Binary fission
C. Conidia formation
D. Endospore formation

Answer 1

Hint: The kingdom Monera is made up of single celled prokaryotic organisms. The members of the kingdom Monera do not possess true nucleus and membrane bound organelles such as ribosomes, Golgi apparatus etc. The Kingdom Monera can be classified into two major groups- Archaebacteria Eubacteria. The monerans reproduce asexually as well as sexually through conjugation.

Complete answer:
Option A elementary bodies: Elementary bodies are nuclear or cytoplasmic aggregates of substances like proteins. They are produced by certain pathogenic organisms during infection. The elementary bodies also help in reproduction in mycoplasma. However, monerans do not reproduce through elementary bodies.
Option A is incorrect
Option B binary fission: Binary fission is a type of asexual reproduction where separation of the parent cell into two new daughter cells occur. One copy of the parent DNA is given to each daughter cell. Binary fission is the primary method of reproduction of all prokaryotic organisms.
Option B is correct
Option C conidia formation: Conidia are non-motile, asexual spores that are formed at the end of the conidiophore, a specialized hyphal structure that produces the conidium. Conidia are the primary method of reproduction in fungus.
Option C is incorrect.
Option D Endospore formation: Endospores are tough, dormant and resistant spores produced by some of the gram positive bacterias. They are produced by the bacterias to endure unfavourable environmental conditions such as heat, UV radiations, excessive cold etc. The spores remain viable for a prolonged period of time.
Option D is incorrect.

Therefore, Option B Binary fission is the correct answer.

Note:
Gram negative organisms are organisms that do not retain crystal violet dye during the gram staining method of bacterial differentiation. They take up the counterstain, safranin. The cell wall of gram-negative bacteria is made up of a thick layer of lipids with no or thin peptidoglycan layer. The absence of peptidoglycan makes their cell wall very weak. Gram negative organisms are usually pathogenic in nature.