21. In which of the following family C3, C4 and CAM plant species are found?
(A) Crassulaceae
(B) Cactaceae
(C) Poaceae
(D) Euphorbiaceae
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22. Which of the following diseases is caused by protozoa, bacteria and virus in that sequence ?
(A) Malaria, mumps and typhus
(B) Amoebiasis, polio and tetanus
(C) Sleeping sickness, Diphtheria and Hepatitis B
(D) Yellow fever, syphilis and influenza
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23. Mitochondrial DNA of human cells is not
(A) Naked
(B) Double-stranded
(C) Circular
(D) Of paternal origin
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24. In which genus seta elongates upto 50 mm and becomes almost transparent at maturity ?
(A) Marchantia
(B) Pellia
(C) Funaria
(D) Sphagnum
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25. Which of the following glycosidic bond is found in sucrose ?
(A) α 1 – 4
(B) β 1 – 4
(C) α 1 – β 2
(D) α 1-6
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26. Which of the following represents the probability, P of an event which is certain ?
(A) P= 1
(B) P = 10
(C) P = 50
(D) P= 100
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27. The developing fruit of Cocos nucifera contains milky fluid. It is
(A) Nuclear endosperm
(B) Liquid syncytium
(C) Solution of unknown morphological nature
(D) Both (A) and (B) are correct
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28. One Haemoglobin (Hb) molecule carries
(A) 4 molecules of O2
(B) 3 molecules of O2
(C) 2 molecules of O2
(D) 1 molecule of O2
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29. The process of determination of the sequence of genes on a chromosome is termed
(A) Gene localization
(B) Gene sequencing
(C) Chromosomal mapping
(D) DNA sequencing
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30. Double circulation of blood in mammals refer to
(A) Paired arteries
(B) Paired veins
(C) The blood circulates twice in heart as quickly
(D) The process is completed in two turns, one from heart to lung and back to the rest of body from heart
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31. The food chain that starts from plants and goes from smaller to larger animals is
(A) Detritus food chain
(B) Parasitic food chain
(C) Predator food chain
(D) Saprophytic food chain
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32. Glucagon stimulates
(A) Increase of breakdown of glycogen to blood sugar
(B) Formation of glucose from amino acids
(C) Rise of blood sugar level
(D) All of these
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33. First United Nations Conference on Human Environment was held in Stockholm in the year
(A) 1972
(B) 1986
(C) 1992
(D) 2000
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34. Silica for the formation of siliceous spicules is
(A) Synthesized by the sponge
(B) Provided by symbiotic algae
(C) Supplied by bacteria
(D) Extracted by the sponge from the sea water
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35. Which of the following plants produce green spores ?
(A) Psilotum
(B) Lycopodium
(C) Riccia
(D) Equisetum
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36. Aerial respiration in pila occurs from
(A) Pulmonary sac
(B) Mantler
(C) Ctenidium
(D) Branchiae
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37. Naturally occuring enzyme lysozyme is found in
(A) Saliva
(B) Tears
(C) Both (A) and (B)
(D) None of the above
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38. When the expression of a gene is changed due to presence of another gene, it is called as
(A) Overdominance
(B) Lethal genes
(C) Selfish gene
(D) Epistasis
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39. Elettaria Cardamomum belongs to
(A) Dicot
(B) Monocot
(C) Conifer
(D) Monochlamydeae
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40. Root-Knot disease caused by
(A) Mycoplasma
(B) Nematodes
(C) Virus
(D) Fungi
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