Plant Pathology MCQ Question and Answer | Agriculture MCQ Question

Calvin cycle occurs in Chloroplasts.
The Calvin cycle of photosynthesis is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose.
In plants, these reactions occur in the stroma, the fluid-filled region of a chloroplast outside the thylakoid membranes. These reactions take the products (ATP and NADPH) of light-dependent reactions and perform further chemical processes on them.

The number of Calvin cycles required to generate a molecule of hexose is 6.
One turn of the Calvin cycle fixes one molecule of carbon dioxide. Thus, six turns of the Calvin cycle are required to produce one molecule of hexose sugar.

Beijerinck is considered the founder of virology.
Martinus Willem Beijerinck (1851 - 1931) first discovered a pathogen that was smaller than a bacterium. He called it a virus and is therefore the father of virology.
Beijerinck was the first to recognize that viruses are reproducing entities that are different from other organisms. He also discovered new types of bacteria from soil and described biological nitrogen fixation.

Phytoplasma can be detected by DAPI stain, Dienes' stain, and ELISA.
Phytoplasmas are obligate intracellular parasites of plant phloem tissue and of the insect vectors that are involved in their plant-to-plant transmission.
The use of the polymerase chain reaction (PCR) and sequencing of the corresponding amplicons generated from the ribosomal RNA (rRNA) gene have allowed the identification and comparison of phytoplasma strains with techniques such as restriction fragment length polymorphism (RFLP) and phylogenetic analysis.

When a cell converts light energy into chemical energy, ADP + iP = ATP reaction would take place.
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy.
In plants, light-dependent reactions occur in the thylakoid membranes of the chloroplasts where they drive the synthesis of ATP and NADPH. The hydrogen ions are released in the thylakoid lumen and therefore contribute to the transmembrane chemiosmotic potential that leads to ATP synthesis.

Nitrogen is a major nutrient because it is required by plants more.
Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide.
It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.

If the roots of the plant are removed and the plant is placed in water, then Passive absorption will continue to happen.
Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes.
The rate of passive transport depends on the permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins.

Oomycetes are a zoospore-producing class of fungi.
Oomycete zoospores are single nucleated and wall-less cells that can swim with the help of two flagella; one tinsel (or anterior) flagellum, and one whiplash (or posterior) flagellum.
Zoospores are produced by Blastocladiomycota, Chytridiomycota, Neocallimastigomycota, and diverse zoosporic fungi of the uncertain taxonomic assignment included in the Cryptomycota.