PMT EXAM QUESTIONS AND ANSWERS
What features of a cell suggest is it eukaryotic rather than prokaryotic? - Answers -
Nucleus
Mitochondria
Golgi/ER
Linear chromosomes
DNA wrapped around histone proteins
Large ribosomes
Describe how the mosquito transmits the malarial parasite to a human. - Answers -
mosquito is vector
Plasmodium parasite present in saliva
of infected mosquito feeds on human
Plasmodium / parasite, passes from saliva to blood
Suggest reasons why people may appose insecticides - Answers - destruction of a
species is morally / ethically, wrong;
might cause unintended health problems in humans ;
might harm other species
Suggest how the effects of insecticide use on a population of Anopheles mosquitoes
could be measured and state the steps that should be taken in order to produce valid
and reliable results. - Answers - Field investigation using a pond net with random
sampling before and after insecticide treatment
(sampling in) different, times / weather ;
large number of samples taken ;
idea of standardised sampling procedure ;
Idea of counting by the same method
idea of preventing counting same individual more than once ;idea of capture - recapture
;
calculate mean / calculate standard deviation / apply statistical test ;
Describe the changes in antibody concentration that occur in the patient's blood during
the primary response. - Answers - no antibodies detected before X days / antibodies
appear at X days ;
increase then decrease / peak ;figures for peak with time and antibody concentration ;
What features of a cell suggest is it eukaryotic rather than prokaryotic? - Answers -
Nucleus
Mitochondria
Golgi/ER
Linear chromosomes
DNA wrapped around histone proteins
Large ribosomes
Describe how the mosquito transmits the malarial parasite to a human. - Answers -
mosquito is vector
Plasmodium parasite present in saliva
of infected mosquito feeds on human
Plasmodium / parasite, passes from saliva to blood
Suggest reasons why people may appose insecticides - Answers - destruction of a
species is morally / ethically, wrong;
might cause unintended health problems in humans ;
might harm other species
Suggest how the effects of insecticide use on a population of Anopheles mosquitoes
could be measured and state the steps that should be taken in order to produce valid
and reliable results. - Answers - Field investigation using a pond net with random
sampling before and after insecticide treatment
(sampling in) different, times / weather ;
large number of samples taken ;
idea of standardised sampling procedure ;
Idea of counting by the same method
idea of preventing counting same individual more than once ;idea of capture - recapture
;
calculate mean / calculate standard deviation / apply statistical test ;
Describe the changes in antibody concentration that occur in the patient's blood during
the primary response. - Answers - no antibodies detected before X days / antibodies
appear at X days ;
increase then decrease / peak ;figures for peak with time and antibody concentration ;
