Plant Pathology - Study Mode
[#696] Basidiospores of wheat black rust germinate on
Correct Answer
(A) Barbery
Explanation
Solution: Basidiospores of wheat black rust germinate on Barbery. A basidiospore is a reproductive spore produced by Basidiomycete fungi, a grouping that includes mushrooms, shelf fungi, rusts and smuts. Basidiospores typically each contain one haploid nucleus that is the product of meiosis, and they are produced by specialized fungal cells called basidia. Basidiospores infect young leaves of common barberry (Berberis vulgaris) or other susceptible Berberis, Mahonia, or Mahoberberis species or cultivars.
[#697] Furctose 1 : 6 biphosphate splits into two triose phosphates by enzyme
Correct Answer
(A) Aldolase
Explanation
Solution: Fructose 1 : 6 biphosphate splits into two triose phosphates by enzyme Aldolase. Aldolase, is an enzyme catalyzing a reversible reaction that splits the aldol, fructose 1,6-bisphosphate, into the triose phosphates dihydroxyacetone phosphate (DHAP) and glyceraldehyde 3-phosphate (G3P).
[#698] Which of the following does not hold good for virusoids?
Correct Answer
(C) Absence of sequence homology
Explanation
Solution: Absence of sequence homology does not hold well for virusoids. Sequence homology is the biological homology between DNA, RNA, or protein sequences, defined in terms of shared ancestry in the evolutionary history of life. Inference of homology from protein sequences provides an essential tool for analyzing protein structure, function and evolution. Virusoids are circular single-stranded RNA. These are essentially viroids that have been encapsulated by a helper virus coat protein, also they are dependent on viruses for replication and encapsidation.
[#699] Tyndallization consists of heating the subastance at
Correct Answer
(C) 100°C
Explanation
Solution: Tyndallization consists of heating the substance at 100°C. Tyndallization is a process from the nineteenth century for sterilizing substances, usually food, named after its inventor John Tyndall, that can be used to kill heat-resistant endospores. Tyndallization essentially consists of heating the substance to boiling point (or just a little below boiling point) and holding it there for 15 minutes, three days in succession.
[#700] A 5-carbon compound of Krebs cycle is a key compound in nitrogen metabolism. It is
Correct Answer
(C) α-Ketoglutaric acid
Explanation
Solution: A 5-carbon compound of Krebs cycle is a key compound in nitrogen metabolism. It is α-Ketoglutaric acid. The Krebs cycle is present in every cell that uses oxygen to produce energy. This metabolic pathway is used as an anabolic cellular principle but also in the presence of catabolism. α-Ketoglutaric acid (2-oxoglutaric acid) is one of two ketone derivatives of glutaric acid. It is the keto acid produced by deamination of glutamate, and is an intermediate in the Krebs cycle.