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zearalenone it was first isolated as the agent responsible for vulvovaginitis in pigs has very little acute toxicity but there should be some concern
q what is deoxynivalenoldeoxynivalenol don is a far more common but much less toxic trichothecene and is produced by species such as f graminearum
another important genus of mycotoxin producers is fusarium many species of which produce members of the trichothecene family of mold metabolites like
these mycotoxins are structurally and biologically related to the aflatoxins and like the latter they cause hepatocarcinogenic activity in animals
why is complementary base pairing important in dna structure complementary base pairing is important because the hydrogen bonds between the bases
if 15 of the nucleotides in a dna molecule contain guanine what percentage of the nucleotides having each of the other three bases describe your
what are the three parts of a dna nucleotide and how are they connected to each otherthe three types are a deoxyribose sugar a phosphate group and a
why is an s strain of bacteria able to cause disease in mammals but a r strain is notthe slippery capsule stops the cells of the defence system from
some animals such as cows normally make only one offspring from each mating if a cow showed a dominant phenotype why would a typical testcross be a
how would mendels observations and conclusions have been dissimilar if many of the characteristics he studied such as seed color and seed texture had
explain how the events of meiosis account for the law of segregation and the law of independent assortmentin meiosis the two alleles of every gene
what are one advantage and one disadvantage of asexual reproduction compared with sexual reproduction the benefit of asexual reproduction is that
q control of aflatoxincontrol because aflatoxins are potentially widespread in occurrence and have an insidious combination of acute and chronic
how do the products of meiosis i differ from those of meiosis ii in meiosis i the offspring cells are haploid but every cell contains two copies of
list the four phases of meiosis i and briefly explain what occurs during each phaseprophase i dna coils into chromosomes the nucleolus and nuclear
define two ways in which genetic recombination occurs during meiosisgenetic recombination happens during crossing- over and independent
q when aflatoxigenic molds can occuroccurrence aflatoxigenic molds can occur in warmer parts of the world and aflatoxicosis maybe produced in a wide
q what is aflatoxinaflatoxins are the most widely studied of all mycotoxins knowledge of their existence dates from 1960 when more than 100000 turkey
q explain diffrent type of mycotoxinsmycotoxins are secondary metabolites produced by molds on foodstuffs that cause illness or death when ingested
what would happen to a cell and its offspring if the cells did not go by a g1 phase during their cell cycle describe without a g1 growth phase the
describe cytokinesis in a plant cellvesicles produced by the golgi apparatus fuse at the midline of the cell to form the cell plate a cell
fungi are a very diverse group of organisms and have a significant impact on the production spoilage and safety of food molds have not only served to
algal or planktonic fish poisonings fish poisoning can result from the ingestion of fish or shellfish that have fed upon algae toxic to human beings
some plants and animals originate food contain toxic substances some pulses and legumes contain a number of toxic substances such as protease
food borne intoxications are basically food borne illness caused due to ingestion of toxin produced my microorganisms mycotoxins bacterial toxins