Biological Classification Chapter-Wise Test 7

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about Mycoplasma is correct?

Mycoplasma have a rigid cell wall.
Mycoplasma lack a cell wall.
Mycoplasma contain peptidoglycan in their cell walls.
Mycoplasma are not affected by antibiotics that target cell walls.
2

Mycoplasma are unique bacteria that completely lack a cell wall.

Which of the following statements about protozoans is incorrect?

Protozoans are unicellular eukaryotic organisms.
Protozoans can be free-living or parasitic.
Protozoans reproduce only sexually.
Protozoans exhibit locomotion using cilia, flagella, or pseudopodia.
3

Protozoans reproduce both sexually and asexually, depending on the species.

Which type of organism is responsible for causing malaria?

Plasmodium
Trypanosoma
Paramecium
Euglena
1

Plasmodium, a sporozoan protozoan, is the causative agent of malaria in humans, transmitted through the bite of infected Anopheles mosquitoes.

What is the major component of the fungal cell wall?

Cellulose
Chitin
Peptidoglycan
Lignin
2

The fungal cell wall is primarily composed of chitin, which provides structural support.

Which of the following statements about Mycoplasma is incorrect?

Mycoplasma are the smallest free-living organisms.
Mycoplasma lack a cell wall.
Mycoplasma contain peptidoglycan in their cell walls.
Mycoplasma are resistant to antibiotics targeting cell walls.
3

Mycoplasma lack a cell wall and therefore do not contain peptidoglycan.

Which of the following statements about prions is correct?

Prions are infectious proteins.
Prions contain RNA as genetic material.
Prions have a cellular structure.
Prions infect only plants.
1

Prions are infectious proteins that cause neurodegenerative diseases such as mad cow disease.

What distinguishes Viroids from Viruses?

Viroids contain both DNA and RNA
Viroids lack a protein coat
Viroids infect animals
Viroids have a lipid membrane
2

Viroids are infectious RNA molecules that lack a protein coat, unlike viruses.

Which of the following statements about fungi is correct?

Fungi are exclusively autotrophic.
Fungi have chitin in their cell walls.
Fungi store carbohydrates as starch.
Fungi reproduce only through sexual reproduction.
2

Fungi have cell walls made of chitin, distinguishing them from plants that have cellulose-based cell walls.

Which of the following statements about protozoans is correct?

All protozoans are multicellular.
Protozoans reproduce only sexually.
Protozoans include free-living and parasitic forms.
Protozoans do not exhibit locomotion.
3

Protozoans include both free-living and parasitic species, such as Amoeba and Plasmodium.

What makes Euglena unique among protists?

It is entirely autotrophic
It has a cell wall like plants
It can switch between autotrophic and heterotrophic nutrition
It reproduces sexually
3

Euglena can photosynthesize in light but becomes heterotrophic in the absence of light.

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