Biological Classification Test

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Biological Classification Test - 29

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following can photosynthesis at low temperature (-20$$^{0}$$C) ______________.

A
Bacteria

B
Lichen

C
Yeast

D
Batrachospermum

Solution

Lichen's can photosynthesis at a very low temperature.
i.e.,−20C
So the correct option is B.
Question 2
1 / -0

Fungi do not contain_______________.

A
Chlorophyll

B
Hyphae

C
Nuclear membrane

D
Chitin
Solution
- The fungal cell wall shows the presence of chitin.
- Since they are eukaryotes, they possess a well-defined nucleus with a nuclear membrane.
- They are made of filamentous structures called hyphae.
- However fungi do not have chlorophyll as they are heterotrophic, i.e., they can not synthesize their own food. They are either saprophytes or parasites.
Hence the correct option is A.
Question 3
1 / -0

Amoeba and Paramecium belong to which category of organisms?

A
Protozoa

B
Porifera

C
Algae

D
Bacteria

Solution

Organisms that are single-celled, swim in the water and consume food are generally called protozoa. They belong to the kingdom Protista and are classified into different phyla based on how they move. The amoeba, which belongs to the phylum Sarcodina. This single-celled protist can be any shape it wants because its membrane is flexible and it can push its cytoplasm around to change its shape. The word amoeba means to change. Paramecium moves using tiny hair-like structures on its surface called cilia. The paramecium belongs to a whole group of protists that move using cilia, the phylum Ciliophora.
Hence the correct option is A.
Question 4
1 / -0

Which of the following reproduces only inside a host cell?

A
Bacteria

B
Virus

C
Protist

D
Fungus

Solution

Bacteria, protists and fungus can regenerate and reproduce by cell division without the requirement of a host body. In contrast, viruses are considered to be between living and nonliving because outside the host acts as nonliving and inside the host, they multiply and thus are living. since they can only reproduce in the host cells. This is because the proteins and components required to build their body structures are not encoded by the viral nucleic acids. Thus they rely on host cells for building factors and can only reproduce by infecting living host cells.
So, the correct answer is option B.
Question 5
1 / -0

Bacteria are used in experiments to study the effects of changing temperature on the growth of microbes instead of viruses because

A
Viruses cannot reproduce outside a host

B
Bacteria reproduce faster than viruses

C
Viruses do not have cell walls

D
Bacteria are larger than viruses

Solution

Viruses are infectious agents that have genetic material in the form of DNA or RNA surrounded by a protein capsid. They do not possess the cellular requirements and organization essential for replication on their own. Hence in order to survive and multiply they require the host machinery and hence cannot be used in experiments. Thus, the correct answer is option A.
Question 6
1 / -0

Which of the following microorganisms exists as a crystal?

A

B

C

D

Solution

Viruses are considered as living and nonliving both. They exist in crystalline form outside the host but inside the host, they replicate using the host machinery. Viruses inject the genetic material which multiplies inside the host and is packed into protein coat known as capsomeres. The cell ruptures and releases the newly formed viruses.
So, the correct answer is option C.
Question 7
1 / -0

Which of the following can be made into crystal?

A
Bacterium

B
Amoeba

C
Virus

D
Sperm

Solution

Virus remains as a non-living entity outside the host. They can multiply and start living once they invade the host. Outside the host, they do not multiply and exist in the form of crystals. A numerous virus remains together in the form of crystals.
Question 8
1 / -0

The two micro-organisms which live in symbiotic association in lichens are

A
Fungus and protozoa

B
Alga and bacteria

C
Bacteria and protozoa

D
Alga and fungus

Solution

A lichen is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont) growing together in a symbiotic relationship.
Question 9
1 / -0

Observe the figures given below. Which of the following have plant like characters?

A
P and Q

B
Q and S

C
R and S

D
S and P

Solution

The correct identification for following organisms are:
p- Amoeba
Q- Euglena
R- Paramoecium
S- Chlamydomonas
The organisms having plant-like characters belong to Euglenoids while the organisms of Kingdom Plantae have plant features only.,
So, the correct answer is 'OptionB-Q and S'.
Question 10
1 / -0

Which of the following is represented by ''X'' in the figure given below?

A
Protozoa

B
Bacteria

C
Viruses

D
Algae

Solution

The virus is a cellular microorganism which considers as a non-living in outside environment and living inside the host cell. They use host cell mainly for multiplication or reproduction (defining feature of living things) and are the connecting link between the living and non-living things. Thus, the correct answer is option C.