Plant Pathology MCQ Question and Answer | Agriculture MCQ Question

Meiosis occurs in Spore mother cells.
Vascular plants produce cells called spore mother cells since they will give rise to spores in spore cases (sporangia).
Spore mother cells are usually surrounded, during development, by a special nutritive tissue. In the more primitive groups, each sporangium holds many mother cells.

'Little leaf' of brinjal is caused by a Mycoplasma.
Little leaf of Brinjal It is caused by Mycoplasma, It's transmitted by Leaf-hopper. The disease is caused by a plant pathogenic mollicute, Phytoplasma and is transmitted by the insect vector, Hishimonus phycitis which belongs to the group of leafhoppers.
Management of the insect vector using insecticides and cultivation of resistant varieties is the principal means of management of the disease.

The genome of mycoviruses is ds RNA.
Mycoviruses have double-stranded (ds) or single-stranded (ss) RNA genomes.
Mycoviruses are a diverse group that includes ssRNA, dsRNA, and ssDNA viruses, with or without a protein capsid, as well as with a complex envelope.
Most mycoviruses are transmitted by cytoplasmic interchange and are thought to lack an extracellular phase in their infection cycle.

Cytoplasmic inheritance is governed by Cytoplasmic DNA, Mitochondrial DNA and Plasmid.
Cytoplasmic inheritance is the transmission of genes that occur outside the nucleus. It is found in most eukaryotes and is commonly known to occur in cytoplasmic organelles such as mitochondria and chloroplasts or from cellular parasites like viruses or bacteria.
The factors governing the cytoplasmic inheritance are called plasmon or plasmogenes, which are present in the chloroplasts (cp-DNA) or mitochondria (mt-DNA).

Condition favouring cyclic photophosphorylation is Aerobic and low light intensity.
Cyclic photophosphorylation occurs on the stroma lamella, or fret channels. In cyclic photophosphorylation, the high-energy electron released from P700, a pigment in a complex called photosystem I, flows in a cyclic pathway.
It is favoured in anaerobic conditions and conditions of high irradiance and CO₂ compensation points.

One of the following is a C₄ plant Sugarcane.
C₄ carbon fixation is one of three known photosynthetic processes of carbon fixation in plants.
C₄ plants including maize, sugarcane, and sorghum avoid photorespiration by using another enzyme called PEP during the first step of carbon fixation.

Pollen grain shows meiosis.
Microsporogenesis in the anther involves the meiotic division of pollen mother cells, which each produce four microspores.
Meiosis occurs in the anthers. Cells called pollen mother cells to undergo meiosis. If a plant is diploid, each haploid product of meiosis (unicellular microspore) divides mitotically, but asymmetrically, to give two haploid cells.

Glycolysis is C₆H₁₂O₆ ⟶ 2C₃H₄O₃ + 4H.
Glycolysis is the metabolic pathway that converts glucose (C₆H₁₂O₆) into pyruvate. The free energy released in this process is used to form the high-energy molecules adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide (NADH).
Glycolysis is a metabolic pathway that does not require oxygen. Glycolysis is a sequence of ten reactions catalyzed by enzymes.

Vertifolia effect is characterized by the loss of Horizontal resistance.
The Vertifolia effect is a well-documented phenomenon in the fields of plant breeding and plant pathology.
It is characterized by the erosion of a crop's horizontal resistance to disease during a breeding cycle due to the presence of strong vertical resistance, characterized by the presence of R genes.

Stage II of rust fungi are marked by Urediniospores.
Urediniospores are thin-walled spores produced by the uredium, a stage in the life cycle of rusts.
Urediniospores usually have two dikaryote nuclei within one cell. In mass, they are usually pale brown in contrast to teliospores which are generally dark brown.