Biology MCQs

11. A protein that binds to operators or stoperators within prophage to prevent transcription of lytic genes is called__?
[A] immunity repressor
[B] immunity operon
[C] operon repressor
[D] None of these

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12. 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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13. What is the fusion of mature individuals that directly act as gametes called?
[A] Isogamy
[B] Anisogamy
[C] Hologamy
[D] Autogamy

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14. Fruits are not found in gymnosperm plants because__?
[A] They are seedless plants
[B] They are not pollinated
[C] They have no ovary
[D] Process of fertilization does not take place in them

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15. Gymnosperms are called naked seed plants because of the lack of which of the following?
[A] Cotyledon
[B] Endosperm
[C] Ovary Wall
[D] Testa

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16. Which plant tissue can be classified into sclerenchyma, collenchyma and parenchyma?
[A] Complex Permanent Tissue
[B] Simple Permanent Tissue
[C] Intercalary meristem
[D] Epidermis

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17. What is the cork cambium, cork cell, and phelloderm collectively called?
[A] periderm
[B] lenticels
[C] abscission
[D] cytokinin

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18. What does a plant need to survive?
[A] sunshine
[B] nutrients
[C] water
[D] All of the above

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19. Which of the following are extinct body fishes?
[A] Chondrichthyes
[B] Osteichthyes
[C] Placoderms
[D] Acanthodians

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20. Kangaroo is a member of which order?
[A] Monotremata
[B] Marsupialia
[C] Prototheria
[D] Insectivora

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