Plant Pathology MCQ

Test your knowledge with important Plant Pathology MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Plant Pathology MCQs at Bissoy

Stage-II of rust fungi is marked by

ক
Pycniospores

খ
Aeciospores

গ
Basidiospores

ঘ
Urediniospores
Vertifolia effect is characterized by the loss of

ক
Horizontal resistance

খ
Vertical resistance

গ
Both A and B

ঘ
None of these
Glycolysis is

ক
C6H12O6 + 6O2 ⟶ 6CO2 + 6H2O

খ
C6H12O6 ⟶ 2C2H5OH + 2CO2

গ
C6H12O6 ⟶ 2C3H4O3 + 4H

ঘ
C3H4O3 + NADH ⟶ C2H5OH + CO2 + NAD+
Which one shows meiosis?

ক
Root tip

খ
Archesporium

গ
Pollen grain

ঘ
Anther
One of the following is a C4 plant

ক
Sugarcane

খ
Tomato

গ
Mango

ঘ
Apple
Condition favouring cyclic photophosphorylation is

ক
Anaerobic environment

খ
Aerobic and low light intensity

গ
Aerobic and optimum light

ঘ
Anaerobic and low light intensity
Cytoplasmic inheritance is governed by

ক
Cytoplasmic DNA

খ
Mitochondrial DNA

গ
Plasmid

ঘ
All of these
Genome of mycoviruses are

ক
ss RNA

খ
ds RNA

গ
ss DNA

ঘ
ds DNA
'Little leaf' of brinjal is caused by a

ক
Fungus

খ
Bacteria

গ
Virus

ঘ
Mycoplasma
Meiosis occurs in

ক
Endosperm cells

খ
Intercalary meristems

গ
Apical meristems

ঘ
Spore mother cells
The ascus is a sexual fruit of ascomycetes having a globose shape but no ostile (opening) is known as

ক
Chleistothecia

খ
Perithecia

গ
Apothecia

ঘ
All of these
Most widely used fungicide for smut fungi is

ক
Vitavax

খ
Bavistin

গ
Dithane M-45

ঘ
Benzimidazoles
MLO first discovered by

ক
Louis Pasteur

খ
Kuch

গ
Doi

ঘ
R. S. Singh
Which of the following is the seed gall nematode?

ক
A. tritici

খ
A. balsamophila

গ
Aphelenchoides

ঘ
Trichodorus
Respiration is

ক
Endothermic process

খ
Exothermic process

গ
Anabolic process

ঘ
Endergonic process
Excess of ATP inhibits respiration by inhibiting one of the following enzymes

ক
Phosphofructokinase

খ
Hexokinase

গ
Pyruvic decarboxylase

ঘ
Aldolase
Which one is wrong in photorespiration?

ক
It occurs in chloroplasts

খ
It occurs in day time only

গ
It is characteristic of C4 plants

ঘ
It is characteristic of C3 plants
Smut of maize caused by

ক
Ustilago nuda

খ
Ustilago maydis

গ
Ustilago hordei

ঘ
None of these
C4 cycle is

ক
Adjunct to Calvin cycle

খ
Independent cycle

গ
With high RuBP carboxylase efficiency

ঘ
With PEP carboxylase ill bundle sheath cells
Dry seeds when placed in water swell up due to

ক
Absorption

খ
Diffusion

গ
Imbibition

ঘ
Adsorption
Dark reactions of photosynthesis occur in

ক
Granal thylakoid membranes

খ
Stromal lamella membranes

গ
Stroma outside photosynthetic lamellae

ঘ
Periplastidial space
Amylase is an enzyme for which the substrate is

ক
Starch

খ
Proteins

গ
Lipids

ঘ
All of the above
Number of organelles required for photorespiration is

ক
One

খ
Two

গ
Three

ঘ
Four
Meiosis is best observed in dividing

ক
Cells of apical meristem

খ
Cells of lateral meristem

গ
Microspores and anther wall

ঘ
Microsporocytes
RuBISCO content of chloroplast is

ক
20%

খ
5%

গ
11%

ঘ
16%
Micrografting is used to produce plants free from

ক
Virus

খ
RLO's

গ
MLO's

ঘ
Bacteria
Permeability of protoplasm is accelerated by

ক
Ca

খ
P

গ
K

ঘ
Na
Calvin cycle is

ক
Dependent upon light

খ
Independent of light

গ
Supported by light

ঘ
Hindered by light
Potato wart is an example of which type of disease?

ক
Epidemic

খ
Endemic

গ
Pandemic

ঘ
Sporadic
Double fertilization is fusion of

ক
Two eggs

খ
Two eggs and polar nuclei with pollen nuclei

গ
One male gamete with egg and other with synergid

ঘ
One male gamete with egg and other with secondary nucleus