Biology MCQs

11. 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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12. Which of the following branch of biology deals with management of farms and the science of crop production?
[A] Agrostology
[B] Agaronomy
[C] Agroinformatics
[D] Agronomy

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13. Lepidopterology is a branch of biology, which deals with the studies of which of the following?
[A] Lipids and fats
[B] Butterflies and moths
[C] Tongue
[D] Lakes and Ponds

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14. Who has introduced Two Kingdom Classification?
[A] Carolus Linnaeus
[B] Ernest Haeckel
[C] Copeland
[D] RH Whittaker

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15. The lysogenic state is controlled by the activity of the regulatory region of the lambda phage genome, this region is called?
[A] immunity repressor
[B] immunity operon
[C] operon repressor
[D] none of these

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16. Which of the following viruses shows the transformation of infected cells?
[A] Hepatitis B virus
[B] Human T cell lymphotronic virus type I
[C] Epstein-Barr virus
[D] All of these

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17. Classification is based on the following criteria?
[A] Plant body
[B] Vascular system
[C] Seed formation
[D] All of the above

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18. Which of the following is true about the cell wall of Gram-positive bacteria?
[A] It consists of multiple layers
[B] It is thicker than that associated with gram-negative bacteria
[C] It contains teichoic acids
[D] All of these

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19. In gymnosperms how many male gametes are produced by each pollen grain?
[A] 4
[B] 3
[C] 2
[D] 1

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20. The cell wall of which of the following is made up of pectin and cellulose?
[A] Sclerenchyma
[B] Parenchyma
[C] Collenchyma
[D] All of the above

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