MCQ on Subdivition: Basidiomycotina - Examups

Which of the following is a general characteristic of Basidiomycotina? a) Mycelium is non-septate
b) Cell wall consists of chitin and glucans
c) Asexual reproduction is through sporangia
d) Basidiospores are endogenously producedAnswer: b) Cell wall consists of chitin and glucans
What type of septum is present in the mycelium of Basidiomycotina fungi? a) Simple septum
b) Dolipore septum
c) No septum
d) Septum with clamp connectionsAnswer: b) Dolipore septum
What is the function of clamp connections in Basidiomycotina fungi? a) Aid in asexual reproduction
b) Help in sexual reproduction
c) Provide structural support
d) Facilitate spore dispersalAnswer: b) Help in sexual reproduction
Which of the following is NOT a key characteristic of Basidiomycotina? a) Basidiospores are exogenously produced
b) Mycelium is septate
c) Clamp connections are absent
d) Dolipore septum is presentAnswer: c) Clamp connections are absent
Basidiocarps are absent in which class of Basidiomycotina? a) Hymenomycetes
b) Teliomycetes
c) Gasteromycetes
d) UstilaginalesAnswer: b) Teliomycetes
Which type of spores is characteristic of the class Teliomycetes? a) Conidial spores
b) Teliospores
c) Basidiospores
d) AeciosporesAnswer: b) Teliospores
What occurs during the germination of teliospores in rust fungi? a) Formation of a conidium
b) Production of basidiospores
c) Formation of a dikaryotic phase
d) Production of pycniosporesAnswer: b) Production of basidiospores
Which of the following is characteristic of the order Uredinales (rust fungi)? a) Septate mycelium
b) No production of teliospores
c) Presence of conidia
d) Mycelium grows intracellularlyAnswer: d) Mycelium grows intracellularly
In rust fungi, what is the term for the life cycle stage where two host plants are involved? a) Autoecious
b) Heteroecious
c) Macrocyclic
d) MicrocyclicAnswer: b) Heteroecious
What are the primary spores produced in the pycnium of rust fungi? a) Uredospores
b) Aeciospores
c) Pycniospores
d) BasidiosporesAnswer: c) Pycniospores
In which rust fungal life cycle stage are aeciospores produced? a) Pycnium
b) Aecia
c) Uredinia
d) TeliaAnswer: b) Aecia
What is the primary feature of uredospores in rust fungi? a) Single celled and non-pedicellate
b) Binucleate and deciduous
c) Multicellular and sessile
d) Dikaryotic and stickyAnswer: b) Binucleate and deciduous
What is the purpose of teliospores in rust fungi? a) Asexual reproduction
b) Overwintering and karyogamy
c) Fertilization
d) Germination of basidiosporesAnswer: b) Overwintering and karyogamy
What is a characteristic feature of basidiospores in rust fungi? a) They are multicellular
b) They are haploid and unicellular
c) They are dikaryotic
d) They are produced in chainsAnswer: b) They are haploid and unicellular
In which of the following stages does karyogamy take place in rust fungi? a) Uredospore
b) Teliospore
c) Basidiospore
d) AeciosporeAnswer: b) Teliospore
Which of the following statements is true for microcyclic rusts? a) They produce all five spore stages
b) They have a short life cycle with only two spore stages
c) They do not require any host plant
d) They are autoeciousAnswer: b) They have a short life cycle with only two spore stages
Which of the following families in Uredinales has teliospores that are sessile? a) Melampsoraceae
b) Pucciniaceae
c) Coleosporiaceae
d) CronartianceaeAnswer: a) Melampsoraceae
What is the defining feature of the Pucciniaceae family in rust fungi? a) Teliospores in chains
b) Teliospores pedicellate
c) Mycelium is non-septate
d) Presence of only one spore stageAnswer: b) Teliospores pedicellate
Which genus in Pucciniaceae is responsible for the disease known as wheat rust? a) Gymnosporangium
b) Phragmidium
c) Puccinia
d) RaveneliaAnswer: c) Puccinia
In which structure are pycniospores produced in rust fungi? a) Uredinia
b) Aecia
c) Pycnium
d) TeliaAnswer: c) Pycnium
Which of the following spore types is absent in heteroecious rust fungi? a) Uredospores
b) Aeciospores
c) Basidiospores
d) PycniosporesAnswer: d) Pycniospores
Which spore stage in rust fungi is associated with reproduction during the summer? a) Uredospores
b) Basidiospores
c) Teliospores
d) AeciosporesAnswer: a) Uredospores
What type of structure forms during the germination of teliospores in rust fungi? a) Aecium
b) Promycelium
c) Pycnium
d) UrediniumAnswer: b) Promycelium
Which of the following is true regarding the family Pucciniaceae? a) It contains 85 genera
b) It only contains autoecious species
c) It has small, non-pedicellate teliospores
d) The aecia are always cup-shapedAnswer: a) It contains 85 genera
Which type of spore is produced in aecia in rust fungi? a) Dikaryotic spores
b) Binucleate spores
c) Unicellular haploid spores
d) Multicellular teliosporesAnswer: a) Dikaryotic spores
What is the significance of haustoria in rust fungi? a) They are involved in spore production
b) They help the fungus penetrate plant cells
c) They aid in producing teliospores
d) They help in spore dispersalAnswer: b) They help the fungus penetrate plant cells
In Ustilaginales, what type of basidia is present? a) Septate basidia
b) Aseptate basidia
c) Multi-celled basidia
d) Basidia without basidiosporesAnswer: b) Aseptate basidia
What is the primary host interaction for rust fungi? a) They are saprotrophic
b) They parasitize only root systems
c) They are obligate parasites
d) They grow independently of hostsAnswer: c) They are obligate parasites
Which order in Basidiomycotina is characterized by the formation of basidia from a thick-walled probasidium? a) Ustilaginales
b) Uredinales
c) Hymenomycetes
d) GasteromycetesAnswer: b) Uredinales
Which family of Uredinales has teliospores in the form of crust-like layers? a) Cronartianceae
b) Pucciniaceae
c) Coleosporiaceae
d) MelampsoraceaeAnswer: c) Coleosporiaceae

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31. Which of the following genera in the Pucciniaceae family has teliospores that are single-celled?

a) Hemileia
b) Trachyspora
c) Puccinia
d) Gymnosporangium
Answer: a) Hemileia

32. In which genus of Pucciniaceae are the telial pedicels septate?

a) Hemileia
b) Trachyspora
c) Puccinia
d) Gymnosporangium
Answer: b) Trachyspora

33. Which rust genus has telia that are subepidermal with globose pycnia?

a) Uromyces
b) Puccinia
c) Gymnosporangium
d) Hemileia
Answer: a) Uromyces

34. On which family of plants does Gymnosporangium cause rust diseases?

a) Gramineae
b) Cyperaceae
c) Cupressaceae
d) Leguminosae
Answer: c) Cupressaceae

35. What is the characteristic of the teliospores in the genus Tranzschelia?

a) Teliospores in fascicles
b) Teliospores not in fascicles
c) Teliospores with two germ pores per cell
d) Teliospores subepidermal
Answer: a) Teliospores in fascicles

36. What is the characteristic of the teliospores in the genus Puccinia?

a) Bicellular, non-gelatinous
b) Single-celled, non-gelatinous
c) Multicellular, gelatinous
d) Subepidermal, with several germ pores
Answer: a) Bicellular, non-gelatinous

37. Which rust genus has teliospores with the walls colored and thickened with visible pores?

a) Uromyces
b) Hemileia
c) Puccinia
d) Ravenelia
Answer: d) Ravenelia

38. In which genus do teliospores have a structure where the cells are arranged as in phragmospores?

a) Nyssopsora
b) Phragmidium
c) Tranzschelia
d) Puccinia
Answer: b) Phragmidium

39. Which rust genus is associated with rust diseases in leguminous plants?

a) Uromyces
b) Puccinia
c) Gymnosporangium
d) Tranzschelia
Answer: a) Uromyces

40. What type of disease does Puccinia arachidis cause?

a) Asparagus rust
b) Groundnut rust
c) Chrysanthemum rust
d) Sunflower rust
Answer: b) Groundnut rust

41. Which of the following is an important species of Puccinia that causes rust on barley?

a) P. helianthi
b) P. hordei
c) P. graminis tritici
d) P. recondita
Answer: b) P. hordei

42. Which of the following genera causes wheat stem or black rust?

a) Uromyces
b) Puccinia
c) Gymnosporangium
d) Tilletia
Answer: b) Puccinia

43. In the genus Ustilago, how do the teliospores germinate?

a) Through a non-septate promycelium
b) By forming infection hyphae directly
c) By forming sporidia on a septate promycelium
d) By producing a mycelium without sporidia
Answer: c) By forming sporidia on a septate promycelium

44. Which species of Ustilago causes loose smut of wheat?

a) U. zeae
b) U. avenae
c) U. nuda tritici
d) U. scitaminea
Answer: c) U. nuda tritici

45. Which family includes genera like Ustilago and Sphacelotheca, which are known for their smut fungi?

a) Ustilaginaceae
b) Tilletiaceae
c) Melampsoraceae
d) Ceratobasidiaceae
Answer: a) Ustilaginaceae

46. Which genus in the family Tilletiaceae is associated with smut fungi?

a) Urocystis
b) Sphacelotheca
c) Neovossia
d) Tilletia
Answer: d) Tilletia

47. What is a defining characteristic of the genera in the family Exobasidiaceae?

a) Presence of septate basidia
b) Dikaryotic mycelium with clamp connections
c) Formation of a continuous hymenium between epidermal cells
d) Development of a mycelium without producing basidia
Answer: c) Formation of a continuous hymenium between epidermal cells

48. What is the causative organism of blister blight in tea?

a) Exobasidium vexans
b) Amanita phalloides
c) Ceratobasidium
d) Rhizoctonia solani
Answer: a) Exobasidium vexans

49. In the order Exobasidales, which family is associated with gall-forming plant parasites?

a) Exobasidiaceae
b) Ganodermataceae
c) Corticiaceae
d) Tricholomataceae
Answer: a) Exobasidiaceae

50. What is the characteristic feature of the genus Ganoderma?

a) Basidiocarps with a shiny, waxy surface
b) Presence of a well-developed hymenium
c) Fruit bodies that are always resupinate
d) Mycelium growing only on wood
Answer: a) Basidiocarps with a shiny, waxy surface

51. Which species of Amanita is known for its poisonous properties and is called ‘Destroying angel’?

a) A. caesarea
b) A. muscaria
c) A. phalloides
d) A. virosa
Answer: d) A. virosa

52. Which of the following mushrooms is known as ‘Fly agaric’ and is poisonous to flies?

a) Amanita muscaria
b) Amanita caesarea
c) Amanita phalloides
d) Amanita virosa
Answer: a) Amanita muscaria

53. What type of fruit bodies does the genus Pleurotus produce?

a) Gilled mushrooms
b) Resupinate fruiting bodies
c) Varnished, shiny fruit bodies
d) Porous fruit bodies
Answer: b) Resupinate fruiting bodies

54. Which genus in the Amanitaceae family is known for its toxic species?

a) Amanita
b) Limacella
c) Termitomyces
d) Armillariella
Answer: a) Amanita

55. In the genus Ganoderma, what is characteristic of the basidiospores?

a) They are hyaline and unicellular
b) They are colored and elliptical
c) They are multi-celled with thick walls
d) They are produced in clusters on the mycelium
Answer: b) They are colored and elliptical

56. Which family of fungi includes species that can form a mycorrhizal relationship with plants?