MASSACHUSETTS PESTICIDE APPLICATOR CORE EXAM LATEST
2024-2025 ACTUAL EXAM ALL 400 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES
Chronic health effect - ANSWER✔✔-Problems that develop over a relatively long
period of time, following either one significant exposure that initiates a problem, or
following a series of small exposures which accumulate in some manner and result in a
development of a disease or disorder
acute toxicity - ANSWER✔✔-Poisoning from a single dose over a much shorter
duration of time
How soon do health effects occur from accrue toxicity? - ANSWER✔✔-Within 24 hours
of exposure
Chronic health risk problems (major examples) - ANSWER✔✔-Mutagenicity,
oncogenicity, carcinogenicity, teratogenicity, neurotoxicity
Mutagenicity - ANSWER✔✔-Ability of a substance or agent to cause mutations to genes
or chromosomes
Changes from mutagenicity are... - ANSWER✔✔-Almost always harmful
Tests to detect mutagenicity - ANSWER✔✔-Varied. Tests on cells to tests on whole
animals
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,It's believed that chemicals that cause mutations are more likely to be ones that can also
cause... - ANSWER✔✔-Cancers
Why is mutation testing used as a first screen for new compounds? - ANSWER✔✔-
Faster and cheaper than animal lifetime testing
Oncogenicity - ANSWER✔✔-The ability of a chemical to cause abnormal growths or
tumors in tissues
Carcinogenicity - ANSWER✔✔-Ability of a substance or agent to cause malignant
tumors
How do they test chemicals for their ability to cause tumors - ANSWER✔✔-
Administering daily doses to animals for their entire lifetime and then dissecting them
to detect presence of tumors in the animals tissues
A rodent carcinogenicity study takes how long typically? - ANSWER✔✔-2-3 years
Pesticide companies are required to submit test data on oncogenicity from.... -
ANSWER✔✔-Several animal species
There are currently how many pesticide active ingredients considered known, likely, or
probable carcinogens - ANSWER✔✔-Over 70
MDAR - ANSWER✔✔-Massachusetts Department of Agricultural Resources
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,Act to protect children and families from harmful pesticides - ANSWER✔✔-Passed in
2000. Pesticide products that contain carcinogens may not be used in or around schools,
daycares, or after school programs
Teratogenicity - ANSWER✔✔-Ability of a substance to cause abnormal growth or
deformity in developing fetuses (birth defects)
How is teratogenicity tested - ANSWER✔✔-Administering doses of chemical to female
test animals at various stages of pregnancies and observing number of miscarriages and
defective offspring verses what would normally be expected
Examples of animals used to test teratogenicity - ANSWER✔✔-Rodents, rabbits, dogs,
monkeys
Effects of chemicals are usually considered significant for teratogenicity if... -
ANSWER✔✔-They occur at doses not toxic by themselves to the mother
Testing for teratogenicity is standard part of pesticide registration although
___________ May exist for older chemicals - ANSWER✔✔-Data gaps
Neurotoxicity - ANSWER✔✔-Gradual damage to basic nerve structure. Does not refer
to reversible effects
Test animal for neurotoxicity - ANSWER✔✔-Chicken
Hepatoxicity - ANSWER✔✔-Damage to liver
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, Nephrotoxicity - ANSWER✔✔-damage to the kidneys
Immunotoxicity - ANSWER✔✔-Compromise immune system
Fetotoxicity - ANSWER✔✔-Direct toxic injury or death of fetus
Hemotoxic effects - ANSWER✔✔-Blood disorders
Cholinesterases - ANSWER✔✔-Enzymes found in humans, insects, and other species
that are necessary for normal function of the nervous system
What kind of insecticides can block or inhibit cholinesterases - ANSWER✔✔-
Organophosphates, carbamates
How much exposure to cholinesterase blocking pesticides does it take to make you feel
sick - ANSWER✔✔-Depends on type of product, potency of active ingredient, amount
of exposure, whether you're handling concentrated or diluted mixture
Effects of exposure to cholinesterase blocking pesticides - ANSWER✔✔-May range
from no observable effects to severe illnesses or symptoms requiring hospitalization.
Severe poisoning can lead to coma or death
When do symptoms occur after exposure to cholinesterase blocking pesticides -
ANSWER✔✔-Anywhere from time of exposure to 12 hours
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2024-2025 ACTUAL EXAM ALL 400 QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES
Chronic health effect - ANSWER✔✔-Problems that develop over a relatively long
period of time, following either one significant exposure that initiates a problem, or
following a series of small exposures which accumulate in some manner and result in a
development of a disease or disorder
acute toxicity - ANSWER✔✔-Poisoning from a single dose over a much shorter
duration of time
How soon do health effects occur from accrue toxicity? - ANSWER✔✔-Within 24 hours
of exposure
Chronic health risk problems (major examples) - ANSWER✔✔-Mutagenicity,
oncogenicity, carcinogenicity, teratogenicity, neurotoxicity
Mutagenicity - ANSWER✔✔-Ability of a substance or agent to cause mutations to genes
or chromosomes
Changes from mutagenicity are... - ANSWER✔✔-Almost always harmful
Tests to detect mutagenicity - ANSWER✔✔-Varied. Tests on cells to tests on whole
animals
Copyright ©KATELYNWHITMAN 2025. ALL RIGHTS RESERVED
Page 1/47
,It's believed that chemicals that cause mutations are more likely to be ones that can also
cause... - ANSWER✔✔-Cancers
Why is mutation testing used as a first screen for new compounds? - ANSWER✔✔-
Faster and cheaper than animal lifetime testing
Oncogenicity - ANSWER✔✔-The ability of a chemical to cause abnormal growths or
tumors in tissues
Carcinogenicity - ANSWER✔✔-Ability of a substance or agent to cause malignant
tumors
How do they test chemicals for their ability to cause tumors - ANSWER✔✔-
Administering daily doses to animals for their entire lifetime and then dissecting them
to detect presence of tumors in the animals tissues
A rodent carcinogenicity study takes how long typically? - ANSWER✔✔-2-3 years
Pesticide companies are required to submit test data on oncogenicity from.... -
ANSWER✔✔-Several animal species
There are currently how many pesticide active ingredients considered known, likely, or
probable carcinogens - ANSWER✔✔-Over 70
MDAR - ANSWER✔✔-Massachusetts Department of Agricultural Resources
Copyright ©KATELYNWHITMAN 2025. ALL RIGHTS RESERVED
Page 2/47
,Act to protect children and families from harmful pesticides - ANSWER✔✔-Passed in
2000. Pesticide products that contain carcinogens may not be used in or around schools,
daycares, or after school programs
Teratogenicity - ANSWER✔✔-Ability of a substance to cause abnormal growth or
deformity in developing fetuses (birth defects)
How is teratogenicity tested - ANSWER✔✔-Administering doses of chemical to female
test animals at various stages of pregnancies and observing number of miscarriages and
defective offspring verses what would normally be expected
Examples of animals used to test teratogenicity - ANSWER✔✔-Rodents, rabbits, dogs,
monkeys
Effects of chemicals are usually considered significant for teratogenicity if... -
ANSWER✔✔-They occur at doses not toxic by themselves to the mother
Testing for teratogenicity is standard part of pesticide registration although
___________ May exist for older chemicals - ANSWER✔✔-Data gaps
Neurotoxicity - ANSWER✔✔-Gradual damage to basic nerve structure. Does not refer
to reversible effects
Test animal for neurotoxicity - ANSWER✔✔-Chicken
Hepatoxicity - ANSWER✔✔-Damage to liver
Copyright ©KATELYNWHITMAN 2025. ALL RIGHTS RESERVED
Page 3/47
, Nephrotoxicity - ANSWER✔✔-damage to the kidneys
Immunotoxicity - ANSWER✔✔-Compromise immune system
Fetotoxicity - ANSWER✔✔-Direct toxic injury or death of fetus
Hemotoxic effects - ANSWER✔✔-Blood disorders
Cholinesterases - ANSWER✔✔-Enzymes found in humans, insects, and other species
that are necessary for normal function of the nervous system
What kind of insecticides can block or inhibit cholinesterases - ANSWER✔✔-
Organophosphates, carbamates
How much exposure to cholinesterase blocking pesticides does it take to make you feel
sick - ANSWER✔✔-Depends on type of product, potency of active ingredient, amount
of exposure, whether you're handling concentrated or diluted mixture
Effects of exposure to cholinesterase blocking pesticides - ANSWER✔✔-May range
from no observable effects to severe illnesses or symptoms requiring hospitalization.
Severe poisoning can lead to coma or death
When do symptoms occur after exposure to cholinesterase blocking pesticides -
ANSWER✔✔-Anywhere from time of exposure to 12 hours
Copyright ©KATELYNWHITMAN 2025. ALL RIGHTS RESERVED
Page 4/47
