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Main Subjects MCQs With Answers
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Which of the following is a defining characteristic shared by nearly all mammals?
AThey all lay eggs
BThey all live exclusively in water
CThey lack a backbone
DThey have hair or fur and typically nourish their young with milk
In immunology, what term describes a substance, often found on the surface of a pathogen, that triggers a specific response from the immune system?
AAntigen
BEnzyme
CAntibody
DHormone
What term describes the chemical spoilage process in which fats and oils develop an unpleasant smell and taste due to oxidation over time?
ASublimation
BRancidity
CFermentation
DSaponification
The platypus is a notable and unusual example of which small group of mammals that lay eggs rather than giving birth to live young?
AMonotremes
BPrimates
CRodents
DMarsupials
An allergy occurs when the immune system reacts abnormally to what type of substance?
AOnly to substances that are inherently toxic to everyone
BOnly to extreme temperatures
CTo substances that are typically harmless to most people
DOnly to bacteria and viruses
What term describes the visible bubbling or fizzing that occurs when a gas is released from a liquid, such as when an antacid tablet dissolves in water?
ASublimation
BPrecipitation
CDistillation
DEffervescence
What medical condition results from the narrowing of the arteries that supply blood directly to the heart muscle?
ACataracts
BCoronary artery disease
CArthritis
DAsthma
In basic genetics, what generally happens when an organism inherits one dominant and one recessive version of a gene for a particular trait?
AThe recessive trait is always expressed
BBoth traits blend together completely
CThe dominant trait is typically the one that is expressed
DNeither trait is expressed at all
Antioxidants, found naturally in many foods and sometimes added as preservatives, help protect against which type of chemical process?
AFermentation
BExcessive hydration
COxidation
DCrystallization
A stroke occurs when there is a sudden interruption to the blood supply of which organ?
AThe liver
BThe kidneys
CThe lungs
DThe brain