Biological Classification Test

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Biological Classification Test - 84

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Weekly Quiz Competition

Question 1
1 / -0

Viruses

A
Have metabolic machinery to generate ATP

B
Lack genetic material for replication

C
Are inert outside their specific host cell

D
Always have specialised protein coat covered by an envelope
Solution
- A virus is a small infectious agent that replicates only inside the living cells of an organism.
- Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
- While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles.
- Hence, Viruses Are inert outside their specific host cell.
- So, the correct answer is 'Are inert outside their specific host cell'.
Question 2
1 / -0

Which of the following food material is a fungi?

A
Chilgoza

B
Mushroom

C
Papaya

D
Mango

Solution

The following food materials fall in the following category of taxonomic classification:
1) Chilgoza: Pinus of Plant kingdom.
2) Mushroom: Agaricus of kingdom Fungi.
3) Papaya: Carica of Plant kingdom.
4) Mango: Mangifera indica of the Plant kingdom.
So, the correct answer is 'Mushroom'.
Question 3
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Body of lichen consists of two dissimilar organisms. Choose the correct option w.r.t. component which form bulk of the thallus

A
Autotrophic component

B
Prepare food for fungi

C
Form sexual reproductive structure

D
Provide belongs to ascomycetes or sometimes

Solution

Lichens are the symbiotic association of algae and fungi. Lichens are autotrophic, they can make their own food with the help of sunlight and provide food to the fungi and in return fungi provide protection to the lichen. Lichens always reproduce asexually. It is the most controversial organism, it possesses the characters of algae and fungi both. It is placed in ascomycetes.
So, the correct answer is " Autotrophic component'.
Question 4
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All viruses
(A) Contain protein
(B) Contain DNA
(C) Are susceptible to antibiotics
(D) Are intracellular

A
(a) & (d)

B
(b) & (c)

C
(a) & (b)

D
(b) & (d)

Solution

A virus is an infectious agent that typically consists of the nucleic acid molecule in a protein coat. Nucleic acid could be either DNA or RNA.
In our environment, virus exists in two states - extracellular and intracellular.
Extracellular before it invades the host cell and once the virus invades a host cell, it is in an intracellular state.
Antibiotics can't kill viruses because viruses have a different structure and replicate in a different way.
Antibiotics work by targeting the growth machinery in bacteria (Not viruses).
So, the correct option is '(a) & (d)'.
Question 5
1 / -0

Select the correct options with respect to glycocalyx in bacterial cell

A
Made up of polysaccharides

B
Differs in thickness and chemical composition in different bacteria

C

Helps the bacterial cell to hide from host's immune system

D
More than 1 option is correct

Solution

Glycocalyx is a thin layer of tangled polysaccharide fibre deposited outside the cell wall which occurs on the surface of bacteria growing in nature.
So the correct option is, 'made up of polysaccharides'.
Question 6
1 / -0

______ crystallised the TMV and found it to be largely composed of ______

A
Ivanowsky, RNA

B
Beijerinck, DNA

C
Twort, protein

D
Stanley, protein

Solution

Ivanowsky crystallised the tobacco mosaic virus and is a composed of single-stranded RNA virus that infects the wide range of plants especially the tobacco plant.
So, the correct answer is 'Ivanowsky, RNA'.
Question 7
1 / -0

Potato spindle tuber disease causing organism is different from HIV as the former

A
Contains RNA

B
Has no capsid

C
Has no protein

D
All of the above

Solution

Potato spindle tuber disease is caused by potato spindle tuber viroid (PSTDV). It belongs from the pospiviroidae family. It only infect plants. HIV is caused by retrovirus, it belongs from the reteroviridae family. PSTDV viroid possess a circular RNA genome, that is not encapsidated in protein coat. PSTDV behave like a virus but their genome don't code for protein. Retrovirus also contain RNA genome, which is capsidated in protein coat.
So, the correct answer is 'All of the above'.
Question 8
1 / -0

Mycorrhiza exhibits the phenomenon of

A
Commensalism

B
Mutualism

C
Competition

D
Antagonism
Solution
- Mycorrhiza is the product formed by the symbiotic association between fungus and roots of higher plants, in which fungi protects the plant from pathogens and increases the surface area by which plants can absorb soil nutrients and water whereas plants provide the shelter and carbohydrates to fungi in which both get benefited.
Symbiosis includes commensalism, mutualism.
Mutualism, an association between two different organisms in which both get benefited.
Commensalism, an association in which one individual gets benefited without either benefiting or harming the other.

So, the correct answer is 'Mutualism'
Question 9
1 / -0

A complete, mature and infectious particle of virus is called

A
Viroid

B
Virion

C
Virusoid

D
Prion

Solution

Viruses are a small obligate intracellular parasite, contains either RNA or DNA surrounded by virus protein coat. A complete virus particle is called as Virion. The main function of the virion is to deliver its DNA or RNA genome into the host cell so that the genome can be expressed in the host cell.

So, the correct answer is 'Virion'.
Question 10
1 / -0

A bacterium has a generation time of $$50$$ minutes. A culture containing $$10^8$$ cells /mL is incubated for $$300$$ minutes. What will be the number of cells after $$300$$ minutes?

A
$$64 \times 10^3$$ cells

B
$$64 \times 10^8$$ cells

C
$$64 \times 10^9$$ cells

D
$$64.4 \times 10^9$$ cells

Solution

One generation $$= 50$$ units
No. generation $$= \dfrac{300}{50} = 6$$ generation$$(n)$$
No of bacterias $$= (2)^a \times 1$$ initial no
$$(2)^6 \times 10^8$$
$$64 \times 10^8$$ or
$$6.4 \times 10^9$$

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Re-Attempt Weekly Quiz Competition

Biological Classification Test - 84

Result

Biological Classification Test - 84

Score

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Rank

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SHARING IS CARING

Question 1

Have metabolic machinery to generate ATP

Lack genetic material for replication

Are inert outside their specific host cell

Always have specialised protein coat covered by an envelope

Solution

Question 2

Chilgoza

Mushroom

Papaya

Mango

Solution

Question 3

Autotrophic component

Prepare food for fungi

Form sexual reproductive structure

Provide belongs to ascomycetes or sometimes

Solution

Question 4

(a) & (d)

(b) & (c)

(a) & (b)

(b) & (d)

Solution

Question 5

Made up of polysaccharides

Differs in thickness and chemical composition in different bacteria

Helps the bacterial cell to hide from host's immune system

More than 1 option is correct

Solution

Question 6

Ivanowsky, RNA

Beijerinck, DNA

Twort, protein

Stanley, protein

Solution

Question 7

Contains RNA

Has no capsid

Has no protein

All of the above

Solution

Question 8

Commensalism

Mutualism

Competition

Antagonism

Solution

Question 9

Viroid

Virion

Virusoid

Prion

Solution

Question 10

$$64 \times 10^3$$ cells

$$64 \times 10^8$$ cells

$$64 \times 10^9$$ cells

$$64.4 \times 10^9$$ cells

Solution

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