Tag: biology

Questions Related to biology

Osmotrophs are

  1. Bacteria

  2. Fungi

  3. Both A and B

  4. Algae


Correct Option: C
Explanation:

Osmotrophs are heterotrophs which absorb organic substance in solution form.

So, the correct answer is 'Both A and B'

Peptidoglycan is characteristic constituent of cell wall in

  1. Archaebacteria and Eukaryotes

  2. Eubacteria and unicellular Eukaryotes

  3. Bacteria and Cyanobacteria

  4. Monera and Protista


Correct Option: C
Explanation:

Bacteria and cyanobacteria both are prokaryotic organisms. They share many similarities. They both lack true cell organelles. They both posses nucleoid instead of a true nucleus. Peptidoglycan is the characteristic constituent of a cell wall in both bacteria and cyanobacteria. They both posses saprophytic mode of life. They both are similar in cell division as well. 

Thus, the correct answer is 'Bacteria and Cyanobacteria.'

Kingdom monera includes

  1. Bacteria

  2. Nitrogen fixing organisms

  3. Cyanophyceae

  4. All of the above


Correct Option: D
Explanation:

Monera is non-nucleated unicellular organisms. They are prokaryotes. They have a cell wall. They have no membrane-bound organelles such as mitochondria, Golgi complex. They lack a true nucleus. Instead, they have nucleoid, genetic material without a nuclear membrane. Examples include Bacteria, cyanophyceae (Blue-Green algae), Nitrogen-fixing organisms etc.

Thus, the correct answer is 'All of the above.'

Kingdom monera includes

  1. Prokaryotes only

  2. Eukaryotes only

  3. Both A and B

  4. Mesocaryotes only


Correct Option: A
Explanation:

Kingdom Monera includes prokaryotic organisms only. They are unicellular organisms. They are made up of single cell bound by plasma membrane and lack membrane-bound organelles like mitochondria, Golgi bodies. They lack a true nucleus as well. Instead, they possess genetic material without nuclear envelope called as the nucleoid. They also contain ribosomes in the cytoplasm. The example includes bacteria, Blue-green algae.

Thus, the correct answer is 'Prokaryotes only.'

Spirulina belongs to the kingdom

  1. Monera

  2. Protista

  3. Plantae

  4. Fungi


Correct Option: A
Explanation:

Kingdom Monera includes prokaryotic unicellular microorganisms. They lack membrane-bound organelles like mitochondria, golgi complex. They also lack true nucleus. Instead, they have nucleoid, a genetic material without nuclear envelope. They have cell wall. Examples include bacteria, Cyanobacteria like Spirulina

Thus, the correct answer is 'Monera.'

Which of the following is not a moneran?

  1. Mycoplasma

  2. Slime moulds

  3. Archaebacteria

  4. Eubacteria


Correct Option: B
Explanation:

Monera is non-nucleated unicellular organisms. They are prokaryotes. They have a cell wall. They have no membrane-bound organelles such as mitochondria, Golgi complex. They lack a true nucleus. Instead, they have nucleoid, genetic material without a nuclear membrane. Examples include Bacteria, Archaebacteria, Eubacteria, Mycoplasma, Blue-Green algae.

Thus, the correct answer is 'Slime Moulds.'

Incipient nucleus occurs in

  1. Myxophyceae

  2. Chlorophyceae

  3. Phaeophyceae

  4. Rhodophyceae


Correct Option: A
Explanation:

Myxophyceae is the other name for blue green algae or Cyanobacteria. It is a prokaryotic unicellular organism. It lacks membrane bound organelles like mitochondria, golgi complex. It also lacks true nucleus. Incipient nucleus or nucleoid is present in it. Incipient nucleus is a genetic material without nuclear envelope.

Thus, the correct answer is 'Myxophyceae.'

Which of the following can be seen generally in all the prokaryotes?

  1. Contain DNA and RNA

  2. Are bacteria

  3. Demonstrate a circular strand of DNA without a covering of nuclear membrane

  4. All of the above


Correct Option: D
Explanation:
Monerans are non-nucleated unicellular organisms. They are prokaryotes. They have a cell wall. They have no membrane-bound organelles such as mitochondria, Golgi complex. They lack a true nucleus. They have DNA and RNA as genetic material. They have nucleoid, a circular strand DNA without a covering of nuclear membrane. Examples include Bacteria, Blue-Green algae.
Thus, the correct answer is 'All of the above.'

In which kingdom would you include archaea and nitrogen-fixing organisms in the five-kingdom classification?

  1. Plantae

  2. Fungi

  3. Protista

  4. Monera


Correct Option: D
Explanation:

Whittaker's classification includes five kingdom classification system. The five kingdoms include Monera, Protista, Fungi, Plantae, and Animalia. Monera includes Eubacteria and Archaea. They include non-nucleated unicellular organisms. They are prokaryotes. They have a cell wall. They have no membrane-bound organelles and true nucleus.

Thus, the correct answer is 'Monera.'

Maximum nutritional diversity is found in

  1. Fungi

  2. Monera

  3. Plantae

  4. Animalia


Correct Option: B
Explanation:
The kingdom monera is comprised of two groups as archaebacteria and eubacteria. There is diverse range of organisms which are placed under this kingdom. There are prokaryotic bacteria which possess the heterotrophic mode of nutrition in which the digested food material is directly engulfed by the cell. The cyanobacteria are autotrophic and can prepare their food through photosynthesis. There are some chemotrophs which use the organic and inorganic compounds as the source of energy.
Thus, the correct answer is option B.