Biology MCQs

1. The acidic medium of gastric juice along with an enzyme Pepsin breaks the proteins down into smaller parts known as _____?
[A] Peptides
[B] Peptones
[C] Peptose
[D] Amino Acids

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2. Hepatitis A which is the most common cause of jaundice in young people is an infection of liver by ________?
[A] Bacteria
[B] Virus
[C] Amoeba
[D] Prortozoan

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3. Among typhoid, hysteria, measles & influenza which is / are not contagious disease(s)?
[A] Hysteria only
[B] Hysteria & Measles
[C] Hysteria, Typhoid & Measles
[D] All are contagious diseases

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4. Which component in light causes suppression of melatonin produced by the pineal gland?
[A] Red
[B] Blue
[C] Green
[D] Indigo

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5. It has been demonstrated by the scientists that, certain wines such as Red Wine posses health benefits because they contain antioxidants, which work in the body as Free Radical Scavengers and slow the oxidation of other molecules by capturing the free radicals. Which among the following is the most common antioxidant found in Red Wine?
[A] Catechin
[B] Tetrodotoxin
[C] Polyphenol
[D] Tocopherol

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6. Which of following is the primary photosynthetic pigment?
[A] Chlorophyll-b
[B] Carotenoid
[C] Chlorophyll-a
[D] Anthocyanin

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7. Which of the following is the later (Second) formed primary xylem elements?
[A] Xylem fibres
[B] Metaxylem
[C] Xylem parenchyma
[D] Protoxylem

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8. Which of the following is/are found in plant cells but not in those of animals? (UPSC Prelims 1987)
[A] Plastid & Cellular wall
[B] Chromosome
[C] Mitochondria & Golgi apparatus
[D] Cell wall & lysozyme

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9. Why man cannot digest cellulose whereas cows can do so? (UPSC Prelims 1992)
[A] Their gut contains certain bacteria capable of digesting cellulose
[B] They have a many-chambered stomach
[C] They have efficient grinding molars
[D] They produce enzyme cellulose which can digest cellulose

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10. Fat present below the skin surface in our body, acts as a barrier against which of the following losses? (UPSC Prelims 1996)
[A] Loss of heat from the body
[B] loss of essential body fluids
[C] loss of salts from the body
[D] entry of harmful micro-organisms from the environment

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