- Which of the following is a parasitic protozoan that causes sleeping sickness?
a) Giardia
b) Trypanosoma
c) Plasmodium
d) Entamoeba
Answer: b) Trypanosoma
Explanation:
Trypanosoma is the parasitic protozoan responsible for causing African sleeping sickness, transmitted by the tsetse fly.
- Which of the following organisms are involved in the process of decomposition?
a) Bacteria
b) Fungi
c) Both a and b
d) Viruses
Answer: c) Both a and b
Explanation:
Both bacteria and fungi play a critical role in the decomposition of organic matter, breaking it down into simpler substances.
- Which of the following belongs to the kingdom Protista?
a) Euglena
b) Mycoplasma
c) Methanogens
d) Spirogyra
Answer: a) Euglena
Explanation:
Euglena is a member of the kingdom Protista, which consists of single-celled eukaryotic organisms. Mycoplasma is a bacterium, methanogens are archaea, and Spirogyra is a green alga.
- Which of the following components is found in fungal cell walls?
a) Cellulose
b) Chitin
c) Peptidoglycan
d) Glycogen
Answer: b) Chitin
Explanation:
Fungal cell walls are composed of chitin, a polysaccharide that provides strength and rigidity, unlike plant cell walls made of cellulose.
- Which of the following groups of organisms can perform photosynthesis?
a) Viruses
b) Protozoa
c) Algae
d) Fungi
Answer: c) Algae
Explanation:
Algae are photosynthetic organisms that contain chlorophyll and other pigments to capture light energy and produce food.
- Methanogens belong to the domain:
a) Bacteria
b) Eukarya
c) Archaea
d) Protista
Answer: c) Archaea
Explanation:
Methanogens are a type of archaea that produce methane as a byproduct of their metabolism. They live in anaerobic environments like swamps and the digestive tracts of ruminants.
- Which of the following statements is true about fungi?
a) They are always multicellular
b) They perform photosynthesis
c) They are heterotrophic
d) They have chlorophyll
Answer: c) They are heterotrophic
Explanation:
Fungi are heterotrophic organisms that obtain nutrients by absorbing organic matter. They do not perform photosynthesis or contain chlorophyll.
- Which of the following organisms are classified as prokaryotes?
a) Bacteria
b) Protozoa
c) Fungi
d) Algae
Answer: a) Bacteria
Explanation:
Bacteria are prokaryotic organisms that lack a true nucleus and membrane-bound organelles. They differ from eukaryotic organisms like protozoa, fungi, and algae.
- The reserve food material in fungi is usually stored as:
a) Starch
b) Glycogen
c) Fatty acids
d) Cellulose
Answer: b) Glycogen
Explanation:
Fungi store their reserve food material in the form of glycogen, similar to animals, while plants store their food as starch.
- Which of the following is not a characteristic of the kingdom Protista?
a) Unicellular and multicellular organisms
b) Membrane-bound organelles
c) Prokaryotic cells
d) Asexual and sexual reproduction
Answer: c) Prokaryotic cells
Explanation:
Organisms in the kingdom Protista are eukaryotic and have membrane-bound organelles. Prokaryotic organisms belong to the kingdom Monera.
- Which of the following is a freshwater alga?
a) Chlamydomonas
b) Sargassum
c) Fucus
d) Laminaria
Answer: a) Chlamydomonas
Explanation:
Chlamydomonas is a genus of green algae that live in freshwater environments, while Sargassum, Fucus, and Laminaria are marine algae.
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