Plant Pathology - Study Mode

[#761] Ferredoxin is a constitutent of
Correct Answer

(A) PS I

Explanation

Solution: Ferredoxin is a constituent of PS I. Ferredoxins are nonheme-iron-containing proteins and are mainly found in anaerobic bacteria and chloroplasts. Ferredoxin and flavodoxin are soluble proteins that are reduced by the terminal electron acceptors of photosystem I. When NADP + and a suitable enzyme are present, two ferredoxin molecules, carrying one electron each, transfer two electrons to NADP + , which picks up a proton and becomes NADPH.

[#762] The most widely used source of nitrogen in agriculture in India is
Correct Answer

(A) Urea

Explanation

Solution: The most widely used source of nitrogen in agriculture in India is Urea. Urea is the world's most common and widely used nitrogen fertilizer in the agricultural sector for improved plant growth and yield. This chemical fertilizer has been used as a ladder to huge success in the agro revolution among farmers. Urea is an organic solid nitrogen fertilizer with an NPK ratio of 46–0–0.

[#763] Single super phosphate has chemical composition
Correct Answer

(C) Ca(H 2 PO 4 ) 2

Explanation

Solution: Single superphosphate has a chemical composition Ca(H 2 PO 4 ) 2 . Single Super Phosphate contains only one nutrient i.e. Phosphorus. So, it is a simple fertilizer having the chemical formula Ca(H 2 PO 4 ) 2 .2H 2 O (Monocalcium Phosphate Dihydrate). In SSP, the phosphorus is in the form of P 2 O 5 and contains 16% P 2 O 5 . Single Superphosphate is produced by reacting naturally occurring phosphate rock with sulphuric acid. This process converts insoluble phosphates into forms more readily available to plants.

[#764] ETC and TCA enzymes occur in
Correct Answer

(C) Mitochondria

Explanation

Solution: ETC and TCA enzymes occur in Mitochondria. The ETC is embedded within the extensive inner membrane of the mitochondrion, near the mitochondrial matrix in which the TCA cycle is localized. In a series of enzymatic reactions, the TCA cycle generates the reducing equivalents NADH and FADH2, which are required to transfer electrons to the mitochondrial respiratory chain, also known as the electron transport chain (ETC).

[#765] Hexose monosphosphate shunt is
Correct Answer

(D) Penrose phosphate pathway

Explanation

Solution: Hexose monosphosphate shunt is the Pentose phosphate pathway. The pentose phosphate pathway also called the phosphogluconate pathway and the hexose monophosphate shunt and the HMP Shunt is a metabolic pathway parallel to glycolysis. It generates NADPH and pentoses (5-carbon sugars) as well as ribose 5-phosphate, a precursor for the synthesis of nucleotides. While the pentose phosphate pathway does involve the oxidation of glucose, its primary role is anabolic rather than catabolic.