Tag: biology

Questions Related to biology

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.

Which protistian structure is not correctly matched with its function?

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

  1. Pseudopodia- movement and feeding

  2. Cyst- reproductive structure

  3. Eyespot- light detection

  4. Trichocyst- defense and capture of prey

Show answer
Correct Option: B
Explanation:

An organism in it's dormant stage is called a cyst. In these conditions, an organism is inactive and does not perform any daily activities. Thus, they help the organisms survive in unfavourable conditions.

So, option B is the correct answer.

Which of the following kingdoms is intermediate between kingdom monera and muiticellular organisms?

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

  1. Fungi

  2. Animalia

  3. Plantae

  4. Protista

Show answer
Correct Option: D
Explanation:
The monera is the kingdom which comprises of the prokaryotes. The Protista is a kingdom of simple single-celled eukaryotic organisms. They have well-developed cellular components like the nucleus, mitochondria, chloroplast, etc on the basis of which they have been classified as plant and animals like protists. The kingdom Protista is considered as the link between the prokaryotes and the multicellular eukaryotes. 
Thus, the correct answer is option D.  

Which of the following are the characteristics of kingdom Protista?

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

  1. Multicellular organisms whose chromosomes are not enclosed in a nuclear membrane.

  2. Unicellular organisms whose chromosomes are not enclosed in a nuclear membrane.

  3. Unicellular organisms whose chromosomes are enclosed in a nuclear membrane.

  4. Multicellular organisms whose chromosomes are enclosed in a nuclear membrane.

Show answer
Correct Option: C
Explanation:
The Protista is a kingdom of simple single-celled eukaryotic organisms. They have well-developed cellular components like the nucleus, mitochondria, chloroplast, etc on the basis of which they have been classified as plant and animals like protists. The chromosomes are enclosed in the nuclear membrane. These are mostly aquatic organisms which have flagellated structures for movement. 
Thus, the correct answer is option C.  

A symbiotic protist is

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

  1. Plasmodium

  2. Lophomonas

  3. Fuligo

  4. Trypanosoma

Show answer
Correct Option: B
Explanation:

Lophomonas are the protists that can live in a symbiotic relationship or as a parasite in the body of their host. The hosts are arthropods, which could be termites, cockroaches in which lophomonas lives in their digestive system or intestinal tracts.

The correct answer is B.