Medical Entrance Exams NEET practice set-14

1. Flagellated cells are absent in
(a) red algae and BGA
(b) higher seed plants
(c) higher fungi
(d) all of these
2. Most parasitic fungi are autoecious, except
(a) But (b) rust
(c) white rust (d) red rust
3. Which of the following fungi is called Inky cap mushroom?
(a) Agaricus bispora
(b) Coprinus comatus
(c) Psilocybe Mexicana
(d) Amanita phalloides
4. The presence of fucose vesicle is the characteristic of
(a) red algae (b) green algae
(c) euglenoids (d) brown algae
5. Dryopteris and most resemble in having
(a) sporophytic main plant body
(b) gametophytic main plant body
(c) monoecious gametophyte
(d) heterosporous sporophyte
6. In gymnosperms, pollen drop is secreted by
(a) integument (b) nucellus
(c) pollen chamber (d) all of these
7. In the following pedigree chart, the mutant trait is shaded place. The gene responsible for the trait is
(a) dominant and sex-linked
(b) dominant and autosomal
(c) recessive and sex-linked
(d) recessive and autosomal
8. The trait of milk secretion in mammals is
(a) sex-linked (b) sex influenced
(c) sex-limited (d) none of these
9. P-10 is a/an
(a) proto-oncogene (b) oncogene
(c) anticancer gene (d) jumping gene
10. Absorption lag appears during
(a) Night (b) Noon
(c) Early morning (d) Late evening
11. Most of the energy in cell is liberated by the oxidation of carbohydrates when
(a) pyruvic acid is changed into and
(b) pyruvic acid is converted into acetyl CoA
(c) sugar is converted into pyruvic acid
(d) glucose is converted into alcohol and
12. Endothelial cells of anther have fibrous thickenings of
(a) suberin (b) cellulose
(c) cutin (d) lignin
13. The most serious threat to the wildlife comes from
(a) fire (b) flood
(c) snowfall (d) destruction of habitat
14. Brazzein is obtained from
(a) roots of Pentadiplandra brazzeana
(b) the stem of Pentadiplandra brazzeana
(c) berries of Pentadiplandra brazzeana
(d) leaves of Pentadiplandra brazzeana
15. Greatest benefit of shoot tip/meristem culture is
(a) development of somaclonal variations
(b) development of transgenic plants
(c) production of virus-free plants
(d) all of these
16. Name the tissue culture technique used to successfully grow nonviable inter-specific hybrids
(a) Androgenic haploids
(b) Shoots tip culture
(c) Somatic embryogenesis
(d) Embryo rescue
17. Taxon differs from a taxonomic category in
(a) representing individuals of species
(b) being equivalent to any rank
(c) containing real organisms
(4) both (b) and (c)
18. During protein synthesis peptide bond is established between
(a) two activated amino acids held by their RNAs
(b) two amino acids, one attached to t-RNA and other to the ribosome
(c) the carboxyl group of P-site amino acid and the amino group of A-site amino acid
(d) the amino group of P-site amino acid and the carboxyl group of A site amino acid
19. In Lathyrus abaca, the tendril represents the modification of
(a) stipule (b) leaf
(c) leaf apex (d) leaflet
20. The ovuliferous scales of Pinus cone are comparable to
(a) petals (b) sepals
(c) carpels (d) stamens
21. The evolution of sexual reproduction can be evidenced by the species of
(a) Ulothrix (b) Volvox
(c) Chlamydomonas (d) Spirogyra
22. The characteristic of gymnosperm ovule is the presence of
(a) pollen chamber (b) integument
(c) vascular supply (d) nucellus
23. Which of following codons was decoded first
(a) UGA (b) UAG
(c) UUU (d) UAU
24. When the plant grows horizontally for some distance and then rises upward, it is described as
(a) twiner (b) decumbent
(c) procumbent (d) diffuse
25. Source of ‘Gulal’ used in Holi is
(a) Caesalpinia coriaria
(b) C.sappan
(c) C. indica
(d) C. pulcherrima
26. A dry, indehiscent fruit formed from the inferior ovary with basal placentation of bicarpellary syncarpous gynoecium is known as
(a) caryopsis (b) cypsela
(c) cremocarp (d) achene
27. Which of the following spores in Puccinia is bi-celled and binucleate?
(a) Aeciospore (b) Basidiospore
(c) Uredospore (d) Teliospores
28. Which of the following structures is without vascular tissue?
(a) Thorns of Citrus (b) Thorns of Alhagi
(c) Spines of Opuntia (d) Prickles of Rosa
29. In a nucleoside the nitrogenous base is attached to the pentose sugar through a covalent bond. To which carbon atom is attached the nitrogenous base?
(a) 1’ (b) 2’
(c) 3’ (d) 5’
30. Which of the following pigments is present in the eyespot of Euglena?
(a) Chlorophyll (b) Astaxanthin
(c) Carotene (d) Xanthophyll
31. The term genomics was coined by
(a) Crick (b) Bridge
(c) Roderick (d) Khorana
32. ANDI is cloned
(a) sheep (b) bull
(c) monkey (d) cat
33. Potatoes develop on
(a) lateral roots (b) stolons
(c) primary root (d) rhizomes
34. Which of the following genera is characterised by the production of geocarpic fruits?
(a) Cucurbita (b) Pisum
(c) Glycine (d) Arachis
35. Which of the following is a common component of bacterial as well as fungal cell wall?
(a) NAM (b) NAG
(c) Lipid (d) Protein
36. Which of the following is true?
(a) Heartwood is responsible for the conduction of water
(b) Only non-porous wood is present in gymnosperms
(c) Secondary growth takes place by stellar and extra stellar cambia
(d) Amount of secondary phloem formed during secondary growth is more than secondary xylem
37. Match correctly
(i) Cruciferae (a) Tetradynamous
(ii) Compositae (b) Trimerous flowers
(iii) Solanaceae (c) Inferior ovary
(iv) Liliaceae (d) Tortion of carpels
(a) i-a, ii-c, iii-b, iv-d (b) i-a, ii-d, iii-c, iv-b
(c) i-b, ii-a, iii-d, iv-c (d) i-a, ii-c, iii-d, iv-b
38. Which of the following can be used for sustainable agriculture?
(a) Integrated pest management
(b) Biofertilizers
(c) Disease resistant varieties
(d) All of the above
39. Which of the following is false for succession?
(a) size of the organism is small in the beginning while large during climax stage
(b) Niches are few and generalized initially while these are many and specialised during climax stage
(c) Food chains and food webs are simple in the beginning but they become complex over a period of time
(d) Efficiency of energy use decreases as the succession proceeds
40. Which of the following pairs is homologous?
(a) Roots of ferns and rhizoids of mosses
(b) Endosperm of Cycas that of zea.
(c) Endosperm of Pinus and prothallus of Adiantum
(d) Leaves of Selaginella and phylloid of Funaria
41. Which of the following indicates growing population?
(a) High population of old people
(b) High birth rate
(c) High population of young children
(d) Low mortality rate
42. The endosperm cell of angiosperm has 24 chromosomes. The number of chromosomes in its megaspore mother cell shall be
(a) 8 (b) 16
(c) 24 (d) 48
43. The plant, water hyacinth has been used to reduce industrial population as it
(a) absorbs DDT
(b) absorbs heavy metals
(c) absorbs organic compounds
(d) all of these
44. Which of the following floral characters is not shown by floral diagram?
(a) Aestivation
(b) Position of floral parts in relation to mother axis
(c) Position of ovary
(d) Placentation
45. The most novel vector having two sites for restriction endonuclease enzymes are
(a) cosmids (b) plasmid
(c) hybrids (d) cybrids
46. A structure in lichens that is similar to stomata in function is known as
(a) soredium (b) isidium
(c) cyphellae (d) cyanelle
47. Which one of the following is not a thermostable enzyme?
(a) Taq DNA polymerase
(b) RNA polymerase
(c) pfu DNA polymerase
(d) Vent polymerase
48. In the gametophytic type of self incompatibility, which of the following crosses would be completely incompatible?
(a) (b)
(c) (d)
49. Parthenocarpy has been introduced in eggplant by inserting a bacterial gene responsible for the synthesis of
(a) gibberellin (b) cytokinin
(c) auxin (d) abscisic acid
50. The most commonly used growth regulator to induce somatic embryogenesis is
(a) BAP (b) 2, 4-D
(c) IAA (d) GA3