Biological Classification Test

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Biological Classification Test - 18

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Question 1
1 / -0

In Rhizopus, sexual reproduction involves formation of two club shaped structures called

A
Gametangia

B
Coenogametes

C
Progametangia

D
Suspensors

Solution

Sexual reproduction takes place during unfavourable condition by means of gametangial copulation.
Most Rhizopus are heterothallic.
When two mycelium of opposite strain come close to each other, each mycelium produce small outgrowth, called progametangia.
Question 2
1 / -0

Spirulina is a rich source of

A
Minerals

B
Vitamins

C
Proteins

D
All of the above

Solution

Spirulina is a blue-green algae. It is rich source of proteins. It is widely consumed by humans and animals. It contains 57 grams of protein per 100 grams. It contains all the essential amino acids. Hence, people recovering from long illness are often advised to take Spirulina.
Thus, the correct answer is 'Proteins.'
Question 3
1 / -0

Bacteria involved in production of methane gas are

A
Actinomycetes

B
Methanogens

C
Methanotrophs

D
Cyanobacteria

Solution

Methanogens belongs to Archeabacteria groups. They are involved in the production of methane gas or marshy gas. They are capable of producing methange gas in marshy areas. Examples include Methanococcus, Methanobacterium.
Thus, the correct answer is 'Methanogens.'
Question 4
1 / -0

Perfect stage of fungus means

A
When fungus is perfectly healthy

B
When it produces asexually

C
When it reproduces sexually

D
When it forms perfect resting spores

Solution

A phase in the life cycle of certain fungi in which sexual spores are formed, as the asci in the sexual stage of the ascomycetes it is referred to as the perfect stage.
Sexual reproduction as a phase occurs in Phycomycetes (Rhizopus), Ascomycetes (Neurospora) and Basidiomycetes (Agaricus)
Those fungi where the sexual phase is absent or inconspicuous they are grouped into Deuteromycetes or fungi imperfectii (Fusarium)
So, the correct answer is 'When it reproduces sexually'
Question 5
1 / -0

The animals having soft bodies with shell as a covering belongs to

A
Echinodermata

B
Mollusca

C
Porifera

D
None of the above

Solution

The molluscs have a calcareous shell covering the body. However, a soft and spongy layer of skin is present over the visceral hump of molluscs, forming the mantle. Echinoderms do not have a soft body. They have calcareous endoskeleton making it spiny bodies. Poriferans have pores all over the body. Therefore, they are also not soft bodied. Moreover, sponges also bear spicules or spongin fibres.
Question 6
1 / -0

Mature virus particle is

A
Virion

B
Viricide

C
Capsid

D
Peplomer

Solution

The virion is a complete virus particle that consists of RNA or DNA with a protein coat. The virion is a matured virus particle which is independent and infective in nature. Viricide is a substance that destroys viruses. The capsid is the protein coat of a virus. A peplomer is a glycoprotein spike that is present on a viral capsid or envelope. So, the correct answer is 'Virion'.
Question 7
1 / -0

Which of the following phylum of the animal is characterized by jointed legs?

A
Arthropoda

B
Echinodermata

C
Mollusca

D
None of the above
Solution
- Jointed legs are the exclusive characteristic of the phylum Arthropoda.
- Molluscs and Echinodermata do not have any differentiated legs.
- Some common characteristics of Arthropods are:
1. Exoskeleton
2. Segmented bodies
3. Jointed appendages
So, the correct answer is 'Arthropoda'.
Question 8
1 / -0

A characteristic of viruses is

A
Without independent metabolism

B
With independent metabolism

C
Multiplication outside living cells

D
Culture in cell free medium

Solution

The virus is an infective agent that consists of a nucleic acid molecule in a protein coat. A virus is able to multiply only within the living cells of a host. Viruses lack their own metabolic machinery, so they infect host cells and use the host's machinery to reproduce. They can not multiply outside the living cells. So viruses are called as obligate parasites. They cannot be cultured in the medium due to host dependency. Viruses can be cultured only in living cells.
So, the correct answer is 'Without independent metabolism'.
Question 9
1 / -0

Prion consists of _____________.

A
$$DNA$$

B
$$RNA$$

C
Both $$DNA$$ and $$RNA$$

D
Protein
Solution
- A prion is an abnormal form of a normally harmless protein found in the brain that is responsible for a variety of fatal neurodegenerative diseases of animals including humans.
- All prion diseases in mammals affect the structure of the brain or other neural tissue and have no known effective treatment.
- Prion diseases are always fatal.
- Creutzfeldt Jakob disease is the prion disease in humans.
So the correct answer is 'protein'.
Question 10
1 / -0

In which major group of fungi is the common black bread mould placed?

A
Zygomycetes

B
Ascomycetes

C
Basidiomycetes

D
Sporomycetes

Solution

Rhizopus stolonifer is commonly known as black bread mould . It is a member of Zygomycota and considered the most important species in the genus Rhizopus.
So, the correct option is A. ( Zygomycetes )

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Biological Classification Test - 18

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Biological Classification Test - 18

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Question 1

Gametangia

Coenogametes

Progametangia

Suspensors

Solution

Question 2

Minerals

Vitamins

Proteins

All of the above

Solution

Question 3

Actinomycetes

Methanogens

Methanotrophs

Cyanobacteria

Solution

Question 4

When fungus is perfectly healthy

When it produces asexually

When it reproduces sexually

When it forms perfect resting spores

Solution

Question 5

Echinodermata

Mollusca

Porifera

None of the above

Solution

Question 6

Virion

Viricide

Capsid

Peplomer

Solution

Question 7

Arthropoda

Echinodermata

Mollusca

None of the above

Solution

Question 8

Without independent metabolism

With independent metabolism

Multiplication outside living cells

Culture in cell free medium

Solution

Question 9

$$DNA$$

$$RNA$$

Both $$DNA$$ and $$RNA$$

Protein

Solution

Question 10

Zygomycetes

Ascomycetes

Basidiomycetes

Sporomycetes

Solution

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