Biology MCQ - Biology Notes Online

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351 Which type of spores are produced sexually?

A: Conidia

B: Sporangiospores

C: Ascospores

D: None of these

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352 Enzymes responsible for alcoholic fermentation

A: Ketolase

B: Zymase

C: Peroxidase

D: Oxidase

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353 The image obtained in a compound microscope is

A: Real

B: Virtual

C: Real inverted

D: Virtual inverted

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354 Direct microscopic count can be done with the aid of

A: Neuberg chamber

B: Anaerobic chamber

C: Mineral oil

D: Olive oil

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355 Which one of the following fungi is the most serious threat in a bone marrow transplant unit?

A: Candida albicans

B: Aspergillus

C: Blastomyces

D: Cryptococcus

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356 Fixation of atmospheric nitrogen is by means of

A: Biological process

B: Lightning

C: Ultraviolet light

D: All of the above

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357 In a fluorescent microscope the objective lens is made of

A: Glass

B: Quartz

C: Polythene

D: None of these

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358 Salt and sugar preserve foods because they

A: Make them acid

B: Produce a hypotonic environment

C: Deplete nutrients

D: Produce a hypertonic environment

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359 Pick out the vector used in the Human Genome Project

A: Phagemid vector

B: Yeast artificial chromosomes

C: Cosmid vectors

D: Yeast episomal plasmids

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360 The light emitted by luminescent bacteria is mediated by the enzyme

A: Coenzyme Q

B: Luciferase

C: Lactose dehydrogenase

D: Carboxylase reductase

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