Tag: biodiversity and need of classification

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Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Choose the correct answers from the alternatives given.
Which one of the following is not true of organisms included in the kingdom Monera?

  1. They reproduce by mitosis

  2. They originated at least 3.5 billion years ago

  3. They have prokaryotic cellular organisation

  4. Most have cell walls
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Kingdom Monera is able to reproduce through the process of binary fission. It means that a cell replicates its DNA and then divides into two identical cells.

Hence, the correct answer is 'They reproduce by mitosis'.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Choose the correct answers from the alternatives given.
Which one of the following is not true of prokaryotes?

  1. They are living cells

  2. They lack a nucleus

  3. They all are parasitic

  4. They are both archaea and bacteria
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Prokaryotes are single-celled organisms of Bacteria and Archaea. All prokaryotes lack membrane-bound organelles.

So, the correct option is 'They all are parasitic'.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Cyanobacteria are classified under _____________.

  1. Protista

  2. Plantae

  3. Monera

  4. Algae
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cyanobacteria are classified under Kingdom Monera as they are prokaryotes. They are generally photosynthetic in nature and contains pigments, chlorophyll a, carotenoids, etc. Nostoc and Oscillataria are examples of this category.

So the correct option is C.

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

In which kingdom, would you classify the archaea and nitrogen-fixing organisms, if the five-kingdom system of classification is used?

  1. Plantae

  2. Fungi

  3. Protista

  4. Monera
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The five kingdom classification system is comprised of Monera, Protista, Fungi, Plantae and Animalia. The kingdom Monera is divided into the Archaebacteria and the Eubacteria. The Archaebacteria group includes all the archae which are primitive prokaryotes. The Eubacteria group includes the nitrogen-fixing bacterium. So, these organisms are placed in the group of monera.

Thus, the correct answer is option D. 

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Anticoagulant substance in endospore of bacteria is found in 

  1. Exosporium and spore coat

  2. Spore coat and cortex

  3. Cortex and core wall

  4. Cortex and cytoplasm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Endospore of bacteria is mainly covered with three extra layers: 

Exosporium, spore coat and cortex.
Exosporium and spore coat are made of proteins, whereas cortex is made of modified peptidoglycans. Peptidoglycans are coagulants.
Proteins are anticoagulants hence found in exosporium and spore coat.
So the correct answer is ' Exosporium and spore coat'. 

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

The group showing maximum nutritional diversity is

  1. Monera

  2. Plantae

  3. Fungi

  4. Algae
Reveal answer Fill a bubble to check yourself
A Correct answer
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 A. 

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Which unicellular organism of the following does not possess the organised nucleus?

  1. Bacteria

  2. Amoeba

  3. Chlamydomonas

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The kingdom monera is comprised of the prokaryotic organisms. The kingdom is divided into two groups, archaebacteria and eubacteria. They are unicellular or multicellular forming filamentous structures. They do not have well-developed cell organelles such as the nuclear membrane, cell wall, nucleus, mitochondria, etc. Bacteria is a prokaryote while Amoeba and Chlamydomonas are eukaryotes. 

Thus, the correct answer is option A. 

Multiple choice biology biodiversity and classification monera five kingdoms of living organisms biodiversity and need of classification

Bacteria are included in which of the following kingdoms?

  1. Protista

  2. Plantae

  3. Monera

  4. Animalia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Whittaker has divided the living world into different kingdoms. According to him, all living organisms are classified into 5 different kingdoms. Out of these 5, all microscopic minute bacteria are included in the kingdom monera. They constitute unicellular prokaryotic organisms.

So, option C "Monera" is the correct answer.

Multiple choice biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

On what basis plasmids can be separated?

  1. Their size

  2. Their charge

  3. Their A-T:G-C compositiion

  4. Both (A) and (B)

  5. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plasmid DNA can be analysed using agarose gel electrophoresis. When sample of DNA is loaded, onto the agarose gel and electric field is applied, it results in separation of DNA molecules according to their size and shape. On agarose gel, small molecules of DNA are able to pass easily in the electric field. DNA possesses strong negative charge which helps in its movement towards positive electrode in the electrophoresis apparatus. Along with size and shape of DNA molecule, electrophoresis buffer type also determines the rate of migration of DNA molecule.