MGRADES
IB SEHS Topic 3 (FULL) UPDATED Exam
Questions and CORRECT Answers
List the macronutrients - CORRECT ANSWER - Fat(lipid), carbohydrate, protein, and
water
Function of carbohydrates - CORRECT ANSWER - Act as metabolic fuels and energy
stores - especially during intense and prolonged periods of exercise
Function of fats (lipids) - CORRECT ANSWER - Important source of energy in recovery
periods, physically protects vital organs, controls body temperature, assists in hormone synthesis,
cell membranes and transports fat-soluble vitamins
Function of proteins - CORRECT ANSWER - Energy source, (1) structural (muscles,
bones, skin, cells) types, (2) transport/communication types (neurotransmitters, etc.), (3)
protective types (antibodies, mucus), and (4) enzymatic types (digestion, gas transport)
Function of water - CORRECT ANSWER - Medium for biochemical reactions, transports
nutrients/metabolites/waste/hormones/gases, thermoregulation, excretion, cell-cell and cell-
environment communication, lubrication of joints and other surfaces
List the micronutrients - CORRECT ANSWER - Vitamins, minerals, trace elements
Function of vitamins - CORRECT ANSWER - Regulate energy release, co-factors in
various chemical reactions
Function of minerals and trace elements - CORRECT ANSWER - Involved in processes
for maintaining bone and blood health, release of energy, muscle function, maintenance of
cellular fluid balance
Examples of minerals or trace elements needed by the human body - CORRECT
ANSWER - Ca, Cl, Mg, Na, K, P, Cu, Cr, Fe, I, F, Zn, Se, Mn, Mb
, MGRADES
State the chemical composition of a glucose molecule - CORRECT ANSWER - Carbon,
hydrogen, and oxygen (C6H12O6)
Identify a glucose molecule - CORRECT ANSWER -
Explain how glucose molecules can combine to form disaccharides - CORRECT
ANSWER - Condensation reactions remove a water molecule to combine the glucose
molecules
Explain how glucose molecules can combine to form polysaccharides - CORRECT
ANSWER - Multiple monosaccharides can be linked to a disaccharide to form a
polysaccharide (condensation reactions)
State the composition of triacylglycerol - CORRECT ANSWER - Is an ester composed of
a glycerol bound to three fatty acids
Distinguish between saturated and unsaturated fatty acids - CORRECT ANSWER -
Saturated: no double or triple bonds between carbons;
unsaturated: 1 or more double or triple bonds in the fatty acid chain
What is the origin of saturated fats? - CORRECT ANSWER - Animal sources: meat,
poultry, full-fat dairy, tropical oils (palm and coconut)
What is the origin of unsaturated fats? - CORRECT ANSWER - Plant-based foods: olive
oil, olives, avocado, peanuts, cashew nuts, canola oil, seed, sunflower oil, rapeseed
State the chemical composition of a protein molecule - CORRECT ANSWER - Consists
of carbon, hydrogen, oxygen, and nitrogen
IB SEHS Topic 3 (FULL) UPDATED Exam
Questions and CORRECT Answers
List the macronutrients - CORRECT ANSWER - Fat(lipid), carbohydrate, protein, and
water
Function of carbohydrates - CORRECT ANSWER - Act as metabolic fuels and energy
stores - especially during intense and prolonged periods of exercise
Function of fats (lipids) - CORRECT ANSWER - Important source of energy in recovery
periods, physically protects vital organs, controls body temperature, assists in hormone synthesis,
cell membranes and transports fat-soluble vitamins
Function of proteins - CORRECT ANSWER - Energy source, (1) structural (muscles,
bones, skin, cells) types, (2) transport/communication types (neurotransmitters, etc.), (3)
protective types (antibodies, mucus), and (4) enzymatic types (digestion, gas transport)
Function of water - CORRECT ANSWER - Medium for biochemical reactions, transports
nutrients/metabolites/waste/hormones/gases, thermoregulation, excretion, cell-cell and cell-
environment communication, lubrication of joints and other surfaces
List the micronutrients - CORRECT ANSWER - Vitamins, minerals, trace elements
Function of vitamins - CORRECT ANSWER - Regulate energy release, co-factors in
various chemical reactions
Function of minerals and trace elements - CORRECT ANSWER - Involved in processes
for maintaining bone and blood health, release of energy, muscle function, maintenance of
cellular fluid balance
Examples of minerals or trace elements needed by the human body - CORRECT
ANSWER - Ca, Cl, Mg, Na, K, P, Cu, Cr, Fe, I, F, Zn, Se, Mn, Mb
, MGRADES
State the chemical composition of a glucose molecule - CORRECT ANSWER - Carbon,
hydrogen, and oxygen (C6H12O6)
Identify a glucose molecule - CORRECT ANSWER -
Explain how glucose molecules can combine to form disaccharides - CORRECT
ANSWER - Condensation reactions remove a water molecule to combine the glucose
molecules
Explain how glucose molecules can combine to form polysaccharides - CORRECT
ANSWER - Multiple monosaccharides can be linked to a disaccharide to form a
polysaccharide (condensation reactions)
State the composition of triacylglycerol - CORRECT ANSWER - Is an ester composed of
a glycerol bound to three fatty acids
Distinguish between saturated and unsaturated fatty acids - CORRECT ANSWER -
Saturated: no double or triple bonds between carbons;
unsaturated: 1 or more double or triple bonds in the fatty acid chain
What is the origin of saturated fats? - CORRECT ANSWER - Animal sources: meat,
poultry, full-fat dairy, tropical oils (palm and coconut)
What is the origin of unsaturated fats? - CORRECT ANSWER - Plant-based foods: olive
oil, olives, avocado, peanuts, cashew nuts, canola oil, seed, sunflower oil, rapeseed
State the chemical composition of a protein molecule - CORRECT ANSWER - Consists
of carbon, hydrogen, oxygen, and nitrogen
