All MCQs for Competitive Exams
MCQSAll MCQs for Competitive Exams
Practice with answers, explanations, and exam-focused revision notes.
366 MCQs
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Topic Notes: Competitive Exams
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Practice MCQs for CSS, PMS, FPSC, PPSC, NTS and Pakistan competitive exam preparation. Use topic-wise questions, answers, and explanations to revise quickly and improve exam accuracy.
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31
Diatomaceous earth is primarily composed of the fossilized remains of which organisms?
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32
Which physical method of sterilization is primarily responsible for the coagulation of microbial proteins?
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33
Which group of organisms is commonly utilized to assist in the filtration and purification of water in aquariums and ponds?
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34
Which algal genus is frequently utilized in the production of food items such as cakes and pastries?
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35
Which marine organism serves as a historical source for ammonia and charcoal?
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36
What is a primary commercial application for the red alga Gelidium?
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37
Which of the following is considered a rich source of essential minerals like zinc, iron, copper, boron, and manganese?
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38
Which group of organisms is responsible for the production of antibiotics like streptomycin and terramycin?
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39
From which genus of algae is the phycocolloid known as agar-agar primarily extracted?
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40
Which group of organisms is responsible for approximately 50 to 60 percent of global photosynthesis?
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