SNC4M Exam Review UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Pandemic - CORRECT ANSWER Disease that occurs over a wide geographic area and affects
a very high proportion of the population.
Quarantine - CORRECT ANSWER isolation to prevent the spread of disease
R0 - CORRECT ANSWER the number of secondary infections that result from a single
infected individual entering a population of entirely susceptible individuals
Carbohydrate - CORRECT ANSWER compound made up of carbon, hydrogen, and oxygen
atoms; major source of energy for the human body
A nucleotide consists of what theee components? - CORRECT ANSWER Nitrogenous base,
Pentose sugar, Phosphate group
What is a vector? - CORRECT ANSWER Vectors are species that act as a carrier of disease
Define lysogony - CORRECT ANSWER Dormant state, viral DNA remains in host
chromosomes for many cell cycle generations"
Define lysis - CORRECT ANSWER Rupturing of cell. Newly made viruses release from host
cell"
What are prions? - CORRECT ANSWER They are incorrectly folded proteins
What are the Bio safety levels - CORRECT ANSWER "BSL - 1
Low Risk Microbes
Commonly causes disease to healthy host
, Minimal hazard to workers and environment
BSL - 2
Typically indigenous - varying severity
Moderate risk to workers and environment
BSL - 3
Indigenous or exotic
Potentially lethal diseases through respiratory transmission
BSL-4
High Risk Microbes
Dangerous and exotic
Frequently fatal without treatment or vaccines
"
What is Antibiotic Resistance - CORRECT ANSWER Bacterial resistance is the reduced
ability of an antibiotic to stop the bacteria causing disease in the host human
Define nosocomial infections. - CORRECT ANSWER Infections a patient acquires during
their stay in a healthcare environment.
What is the difference between systolic blood pressure and drasolic blood pressure? - CORRECT
ANSWER Systolic blood pressure is when ventricles contract and drastolic blood pressure is
when the ventricles relax
What are some examples of first line defence mechanisms? - CORRECT ANSWER skin, tears,
mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils
What do cytotoxic T cells do? - CORRECT ANSWER They directly attack and kill cells that
have specific antigens. They also kill cancer cells.
What is a macronutrient ? - CORRECT ANSWER A nutrient needed in large quantities in the
diet
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Pandemic - CORRECT ANSWER Disease that occurs over a wide geographic area and affects
a very high proportion of the population.
Quarantine - CORRECT ANSWER isolation to prevent the spread of disease
R0 - CORRECT ANSWER the number of secondary infections that result from a single
infected individual entering a population of entirely susceptible individuals
Carbohydrate - CORRECT ANSWER compound made up of carbon, hydrogen, and oxygen
atoms; major source of energy for the human body
A nucleotide consists of what theee components? - CORRECT ANSWER Nitrogenous base,
Pentose sugar, Phosphate group
What is a vector? - CORRECT ANSWER Vectors are species that act as a carrier of disease
Define lysogony - CORRECT ANSWER Dormant state, viral DNA remains in host
chromosomes for many cell cycle generations"
Define lysis - CORRECT ANSWER Rupturing of cell. Newly made viruses release from host
cell"
What are prions? - CORRECT ANSWER They are incorrectly folded proteins
What are the Bio safety levels - CORRECT ANSWER "BSL - 1
Low Risk Microbes
Commonly causes disease to healthy host
, Minimal hazard to workers and environment
BSL - 2
Typically indigenous - varying severity
Moderate risk to workers and environment
BSL - 3
Indigenous or exotic
Potentially lethal diseases through respiratory transmission
BSL-4
High Risk Microbes
Dangerous and exotic
Frequently fatal without treatment or vaccines
"
What is Antibiotic Resistance - CORRECT ANSWER Bacterial resistance is the reduced
ability of an antibiotic to stop the bacteria causing disease in the host human
Define nosocomial infections. - CORRECT ANSWER Infections a patient acquires during
their stay in a healthcare environment.
What is the difference between systolic blood pressure and drasolic blood pressure? - CORRECT
ANSWER Systolic blood pressure is when ventricles contract and drastolic blood pressure is
when the ventricles relax
What are some examples of first line defence mechanisms? - CORRECT ANSWER skin, tears,
mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils
What do cytotoxic T cells do? - CORRECT ANSWER They directly attack and kill cells that
have specific antigens. They also kill cancer cells.
What is a macronutrient ? - CORRECT ANSWER A nutrient needed in large quantities in the
diet
