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critical thinking why is it necessary to use the same restriction enzyme to cut two pieces of dna that are to be joined togetheras each restriction
how are radioactive probes useful in dna fingerprintingradioactive probes bind to specific fragments in a dna sample like a donor gene a probe can
explain the difference among a sex-linked trait and a sex-influenced traita sex-influenced trait is influenced by the presence of sex hormones and
briefly explain how amniocentesis and chorionic villi sampling are used in genetic screening a small sample is removed from the amniotic fluid
why is pattern baldness more common in men than in womenpattern baldness is handled by the allele b testosterone interacts with the heterozygous
to prevent and control staphylococcal food poisoningbull avoid contamination of foodsbull kill organism by heating refrigerationbull personnel
q outbreak of staphylococcal food poisoningconditions necessary for outbreak of staphylococcal food poisoningbull presence of viable
q list down the various mycotoxins associated with foodmycotoxins associated with foods are bull aflatoxins produced by aspergillus flavusbull
q differentiate between adult and infant botulismbull adult botulism is prevalent amongst adults whereas infant botulism is prevalent in infants of
what factors influence whether a person will develop cancerfactors contain the persons age number of exposures to carcinogens amount of carcinogen in
how do homeotic genes regulate development in drosophilahomeotic genes code for regulatory proteins that are thought to control the rate of cell
q what are the conditions favouring the outbreak of staphylococcal food poisoningbull botulism is caused by the bacteria clostridium botulinumbull
q give the biological effects of aflatoxin and list the various natural toxins present in foodbiological effects of aflatoxin include hepatotoxicosis
q what are mycotoxins and how are they harmfulbull mycotoxins are toxins secondary metabolites produced by filamentous fungi on food and feed that
q prevention and control of staphylococcal food poisoningstaphylococcal food poisoning can be prevented by1 avoiding contamination of food with s
how does the absence of a nuclear envelope in prokaryotes prevent prokaryotes from controlling gene expression by modifying rna after transcription
describe what happens during activation of the lac operon lactose binds to the repressor protein which causes the repressor protein to be released
what is an operon and in what type of organism are operons foundan operon is a series of genes that code for exact products and the regulatory
q conditions necessary for outbreak of staphylococcal foodthe following conditions are necessary for an outbreak of staphylococcal food poisoning1
foods that are frequently incriminated in staphylococcal food poisoning include meat and meat products poultry and egg products egg tuna chicken
staphylococci exist in air dust sewage water milk and food or on food equipment environmental surfaces humans and animals humans and animals are the
describe three ways that rna differs from dna rna is single stranded dna is double stranded all of the codons from the deletion point to the end of
explain why methionine is the first amino acid in every growing polypeptidethe trna that pairs with the start codon on mrna carries methionine rna
staphylococcal food poisoning results from consumption of food containing enterotoxin produced by enterotoxigenic strains of staphylococcus aureus it
q prevention and cure of botulism involvesthe prevention and cure of botulism involves1 strict adherence to safe food-processing practices by the