Tag: the world of microbes

Questions Related to the world of microbes

To which kingdom Amoeba and Euglena belong in Whittaker's classification?

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Monera

  2. Plantae

  3. Protista

  4. Animalia

Show answer
Correct Option: C
Explanation:

The five kingdom classification was proposed by R.H. Whittaker in 1969. The five kingdoms were formed on the basis of characteristics such as cell structure, mode of nutrition, the source of nutrition and body organization. It includes Kingdom Monera,  Protista, Fungi, Plantae, and Animalia. According to Whittaker's 5 kingdom classification, unicellular eukaryotes belong to kingdom Protista. Amoeba and euglena are unicellular eukaryotic organisms so they belong to kingdom Protista.

So, the correct answer is 'Protista'.

Which do not belong to Protista?

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Euglenoids

  2. Zooflagellates

  3. Methanogens

  4. Ciliates

Show answer
Correct Option: C
Explanation:
Unicellular, eukaryotic organisms belongs to the kingdom protista. It includes, chrysophytes, dinoflagellates, protozoans, euglenoids, myxomycetis.
Methanogens are unicellular prokaryotes, belongs to the kingdom monera.
So, the correct option is 'Methanogens'.

Read the following statements.

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Contractile vacuoles eliminates excess water from the body

  2. Glomerular kidney is present in Fresh water fishes

  3. A glomerular kidney possess less no. of nephrons

  4. Chloride cells are present on the stomach wall of frog

Show answer
Correct Option: A
Explanation:

Contractile vacuoles are membrane-bound cellular organelle found in many microorganisms. These periodically expand and get filled with water and contract, expelling the contents to the exterior of the cell.

These are very important for maintaining the hydrostatic balance of the particular cell.
It is an important feature of Eukaryotic cell especially protozoa and it plays important role in osmoregulation.
The correct option is 'Contractile vacuoles eliminates excess water from the body'

Protista includes ________________.

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Eutaryotic organisms

  2. Autotrophic in nutrition

  3. Heterotrophic in nutrition

  4. All organisms which show locomotion

Show answer
Correct Option: A
Explanation:

  • Kingdom Protista includes Eukaryotes can be unicellular or multicellular. they produce sexually or asexually  eg. Plasmodium( cause malaria) , Ameoba.
  • Autotrophic organism creat their own food by fixing carbon .  kingdom Plantae includes all unicellular or multicellular autotrophic organism.

  • Heterotrophic organism obtain their food from organic sources , hence kingdom Fungi and kindom Animalia  includes heterotrophic organism.
  • so the correct answer is "eukaryotic organism".

Protista includes

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Eukaryotic organisms

  2. Autotrophic in nutrition

  3. Heterotrophic in nutrition

  4. All organisms which show locomotion

Show answer
Correct Option: A
Explanation:

A protist is any eukaryotic organism that is not an animal, plant or fungus. The protists do not form a natural group, or clade since they exclude certain eukaryotes; but, like algae or invertebrates, they are often grouped together for convenience. 

So the correct option is 'Eukaryotic organism'.

Find the incorrect match

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Whirling whips ---- Peridinin

  2. Soap box protistans -------- Leucosin

  3. Photosynthetic spindle protistans -------- Chrysolaminarin

  4. Protistan fungi -------- Fat droplets

Show answer
Correct Option: B
Explanation:

Diatoms are protistand in which the cell walls form two thin overlapping shells, which fit together as in a soap box. The walls are embedded with silica. 

So, the correct option is 'Soap box protistans -------- Leucosin'.

The protists have 

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. only free nucleic acid aggregates

  2. membrane bound nucleoprotein lying embedded in the cytoplasm

  3. gene containing nucleoproteins condensed together in loose mass

  4. nucleoprotein in direct contact with the rest of the cell substance

Show answer
Correct Option: B
Explanation:

Protists have a membrane-enclosed nucleus and membrane-enclosed organelles. This nucleus is embedded in the cytoplasm. They may be single or many in number and the nucleus has a membrane covering called the nuclear envelope with pores over it. 

So, the correct option is 'membrane-bound nucleoprotein lying embedded in the cytoplasm'.

Kappa-particles show

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Cytoplasmic inheritance

  2. Nuclear inheritance

  3. Nucleo-cytoplasmic inheritance

  4. Mutation

Show answer
Correct Option: A
Explanation:

Cytoplasmic inheritance, also known as extranuclear inheritance is actually the transmission of genes that occurs outside the nucleus. Kappa particles show cytoplasmic inheritance. Here phenotype not only depends on the cytoplasm but also on the genetic material of the nucleus.

The correct answer is A.

Two species of Amoeba X and Y were kept in fresh water and got adapted. Species X developed contractile vacuole. When both were transferred to sea water and got adapted, both X and Y lost their contractile vacuole. From these observations, we conclude that

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Both X and Y are marine species

  2. Species Y is marine and X is fresh water

  3. Species X is marine and Y is fresh water

  4. Both X and Y are fresh water

Show answer
Correct Option: C

Which of the following is a major evolutionary advance exhibited by protozoan cell in contrast with a bacterium?

biology the world of microbes protista protozoa five kingdoms of living organisms

  1. Formation of permeable cell membrane

  2. Presence of nucleus

  3. Presence of extensive system of cytoplasmic organelles

  4. Both A and B

Show answer
Correct Option: D
Explanation:

Monerans are prokaryotic organisms. They lack a well-developed nucleus and cell organelles. But, on the contrary, protozoa have a well-developed nucleus and are eukaryotic organisms. Bacteria have a cell wall made of cellulose and chitin. Bacteria lack a cell membrane. 

So, option D is the correct answer.