In the five-kingdom classification, the kingdom Protista includes: MCQ with Answer and Explanation

Question
In the five-kingdom classification, the kingdom Protista includes:
A. Bacteria and cyanobacteria
B. Unicellular eukaryotes like amoeba and paramecium
C. Mushrooms and molds
D. Multicellular algae and bryophytes
Answer: Option B
Solution (By JKSSB Mock Tests)
Protista includes unicellular eukaryotes such as protozoans (Amoeba, Paramecium), unicellular algae (Chlamydomonas, diatoms), and slime molds. They may be autotrophic or heterotrophic. Monera contains prokaryotes. Fungi include multicellular (except yeast) saprophytes. Plantae includes multicellular autotrophs. The protist kingdom is a 'catch-all' group for eukaryotes not fitting into fungi, plantae, or animalia.
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Question #1
The type of muscle tissue present in the walls of blood vessels and intestine is:
A. Smooth muscle
B. Skeletal muscle
C. Voluntary muscle
D. Cardiac muscle
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Correct Answer: Option A

Explanation:
Smooth muscle is non-striated, spindle-shaped, involuntary muscle found in the walls of hollow organs like intestines, blood vessels, uterus, and bladder. It controls peristalsis, vasoconstriction, and other autonomic functions. Skeletal muscle is voluntary and striated, cardiac muscle is striated but involuntary.
This question belongs to: Science Biology
Question #2
The disease caused by the SARS-CoV-2 virus is:
A. Influenza
B. SARS
C. MERS
D. COVID-19
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Correct Answer: Option D

Explanation:
COVID-19 (coronavirus disease 2019) is caused by the novel coronavirus SARS-CoV-2. MERS is caused by MERS-CoV, SARS by SARS-CoV. Influenza is caused by influenza viruses.
This question belongs to: Science Biology
Question #3
Which of the following is a difference between plant and animal cells?
A. Plant cells have a plasma membrane; animal cells do not.
B. Plant cells have a cell wall and chloroplasts; animal cells lack these.
C. Animal cells have vacuoles; plant cells lack vacuoles.
D. Plant cells have centrioles; animal cells lack centrioles.
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Correct Answer: Option B

Explanation:
Plant cells possess a rigid cell wall of cellulose, chloroplasts for photosynthesis, and a large central vacuole. Animal cells lack cell wall and chloroplasts, and have small temporary vacuoles if present. Centrioles are present in animal cells (centrosome) but absent in higher plant cells. Both have plasma membrane. The cell wall provides shape and protection. These differences are fundamental in cell biology.
This question belongs to: Science Biology
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