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SACE Stage 2 Nutrition study materials
SACE Stage 2 Nutrition study resources

SACE Stage 2 Nutrition practice questions

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Question 1Nutrition

Which nutrient class provides the body with its most concentrated source of energy per gram?

  1. Lipids Correct answer.
  2. Dietary fibre
  3. Proteins
  4. Carbohydrates

Explanation

Lipids yield roughly 37 kilojoules per gram, whereas carbohydrate and protein each supply about 17 kilojoules per gram. Because fat is the most energy-dense macronutrient, it contributes the greatest kilojoule load per unit of mass consumed.

Question 2Nutrition

Which vitamin is synthesised in the skin when it is exposed to ultraviolet light?

  1. Vitamin B12
  2. Vitamin C
  3. Vitamin K
  4. Vitamin D Correct answer.

Explanation

Ultraviolet B radiation converts a cholesterol derivative in the skin into a vitamin D precursor that is later activated by the liver and kidneys. This makes sun exposure the main endogenous source of the vitamin.

Question 3Nutrition

Which mineral is a central component of the haemoglobin molecule?

  1. Iodine
  2. Zinc
  3. Calcium
  4. Iron Correct answer.

Explanation

Haemoglobin contains haem groups, each of which holds an iron ion at its centre that binds oxygen. Without adequate iron, oxygen-carrying capacity of the blood falls, producing anaemia.

Question 4Nutrition

Which term describes the process by which large food molecules are broken into smaller absorbable units?

  1. Digestion Correct answer.
  2. Metabolism
  3. Peristalsis
  4. Absorption

Explanation

Digestion is the mechanical and chemical breakdown of food into molecules small enough to cross the intestinal wall. Absorption is the later step in which those products enter the bloodstream or lymph.

Question 5Nutrition

According to the Australian Guide to Healthy Eating, approximately what proportion of a day's food intake should come from the grain foods group?

  1. One half
  2. One third Correct answer.
  3. One quarter
  4. Two thirds

Explanation

The guide's plate model places grain foods at roughly one third of daily intake, alongside a similar share of vegetables and legumes. Fruit, dairy and protein foods make up the remaining portion.

Question 6Nutrition

Which macronutrient is the body's preferred fuel during high-intensity, short-duration exercise?

  1. Carbohydrate Correct answer.
  2. Protein
  3. Fat
  4. Alcohol

Explanation

At high intensity the body relies on anaerobic and fast aerobic pathways that use glucose and glycogen, so carbohydrate is the preferred fuel. Fat oxidation is too slow to meet the energy demand of such activity.

Question 7Nutrition

Which food-handling practice most effectively reduces the risk of food-borne illness?

  1. Keeping cold foods below 5 degrees Celsius Correct answer.
  2. Storing raw meat above ready-to-eat foods
  3. Cooling cooked rice slowly at room temperature
  4. Reheating leftovers only once to lukewarm

Explanation

Bacterial multiplication is slowed markedly at temperatures below 5 degrees Celsius, so cold storage limits pathogen growth. The temperature danger zone between 5 and 60 degrees Celsius is where rapid multiplication occurs.

Question 8Nutrition

Which statement best describes the role of dietary fibre in the digestive system?

  1. It is converted to protein by intestinal bacteria
  2. It is fully digested and absorbed in the small intestine
  3. It adds bulk that promotes regular bowel movements Correct answer.
  4. It is stored in the liver as glycogen

Explanation

Fibre resists digestion in the small intestine and reaches the large intestine largely intact, where it adds bulk and helps maintain regular elimination. Soluble forms are partly fermented by gut bacteria, which also supports bowel health.

Question 9Nutrition

A student wants to compare the total energy content of two breakfast cereals. Which label information is most directly useful?

  1. The percentage of each cereal that is sugar
  2. The list of additives on each packet
  3. The kilojoule value per 100 grams Correct answer.
  4. The weight of the packet in grams

Explanation

Energy per 100 grams allows a like-for-like comparison of kilojoule content between products regardless of serving size. Other figures such as sugar percentage describe composition rather than total energy.

Question 10Nutrition

Which combination of foods would best supply complementary plant proteins?

  1. Butter with white bread
  2. Sugar with fruit juice
  3. Rice with lentils Correct answer.
  4. Lettuce with cucumber

Explanation

Cereals such as rice are low in lysine, while legumes such as lentils are rich in lysine but low in methionine. Combining them provides a fuller essential amino acid profile, which is the principle of protein complementation.

Question 11Nutrition

Which statement explains why vitamin C intake is important for iron absorption?

  1. It binds iron and prevents its uptake
  2. It removes iron from the bloodstream
  3. It converts haem iron into non-haem iron
  4. It enhances absorption of non-haem iron Correct answer.

Explanation

Ascorbic acid forms a soluble complex with non-haem iron in the intestine, which keeps the iron available for absorption. This is why pairing plant iron sources with fruit or vegetables rich in vitamin C improves iron status.

Question 12Nutrition

A person follows a vegan diet and is at risk of which nutrient deficiency because it occurs mainly in animal foods?

  1. Dietary fibre
  2. Vitamin B12 Correct answer.
  3. Vitamin C
  4. Potassium

Explanation

Vitamin B12 is found naturally almost exclusively in animal-derived foods, so vegans need fortified products or supplements. Deficiency can cause anaemia and neurological damage if left unaddressed.

Question 13Nutrition

Which statement best describes the glycaemic index of a food?

  1. The amount of insulin stored in the pancreas
  2. The total kilojoules released when the food is burned
  3. The proportion of the food that is indigestible fibre
  4. The rate at which the food raises blood glucose compared with a reference food Correct answer.

Explanation

The glycaemic index ranks carbohydrate foods by how quickly they raise blood glucose relative to a reference such as glucose. Foods with a high index are absorbed rapidly and cause a sharper rise in blood glucose.

Question 14Nutrition

Which process describes the movement of nutrients from the intestine into the bloodstream?

  1. Hydrolysis
  2. Egestion
  3. Absorption Correct answer.
  4. Mastication

Explanation

Absorption is the transfer of digested nutrients across the intestinal mucosa into blood or lymph. It occurs mainly in the small intestine, whose villi greatly increase surface area.

Question 15Nutrition

Which change would most improve the nutritional balance of a diet high in processed snack foods?

  1. Adding salt to snack foods for flavour
  2. Replacing water with sweetened soft drinks
  3. Increasing intake of fresh vegetables and fruit Correct answer.
  4. Increasing the serving size of snack foods

Explanation

Processed snacks are typically energy-dense but low in fibre, vitamins and minerals, so increasing fresh produce restores nutrient density and fibre. This shift improves overall diet quality without simply adding more energy.

Question 16Nutrition

Which statement best explains the role of calcium in bone health during adolescence?

  1. Calcium is converted to vitamin D in bone
  2. Calcium is deposited in bone tissue to support peak bone mass Correct answer.
  3. Calcium is stored in muscle and released during growth
  4. Calcium replaces phosphorus in all body cells

Explanation

Adolescence is a critical period for laying down bone mineral, and calcium is a major structural component of that mineral. Adequate intake during growth supports peak bone mass and lowers later osteoporosis risk.

Question 17Nutrition

Which factor most directly increases a person's basal metabolic rate?

  1. A longer period of sleep each night
  2. A larger proportion of lean muscle mass Correct answer.
  3. A lower intake of vitamin C
  4. A higher intake of dietary fibre

Explanation

Muscle tissue is metabolically active and uses energy even at rest, so a greater proportion of lean mass raises basal metabolic rate. Fat tissue is far less metabolically active by comparison.

Question 18Nutrition

A food label lists sugar as the second ingredient. What does this most likely indicate?

  1. The product contains only natural sugars
  2. The product is a good source of protein
  3. Sugar is present in a relatively large amount Correct answer.
  4. The product contains no carbohydrate

Explanation

Ingredients are listed in descending order by weight, so a sugar listed second is present in a substantial quantity. This suggests the product may be high in added sugar.

Question 19Nutrition

Which meal would best support sustained energy release for an endurance athlete before competition?

  1. A meal with no carbohydrate and high protein
  2. A high-fat, low-carbohydrate meal
  3. A meal rich in low-glycaemic carbohydrates with some protein Correct answer.
  4. A meal consisting mainly of simple sugars

Explanation

Low-glycaemic carbohydrates release glucose more gradually, helping to maintain blood glucose and glycogen availability over a longer period. Adding some protein supports satiety and muscle repair.

Question 20Nutrition

Which statement best explains why water is essential during prolonged exercise?

  1. It prevents all muscle fatigue during activity
  2. It helps regulate body temperature through sweating Correct answer.
  3. It supplies energy directly to working muscles
  4. It replaces electrolytes lost in sweat without other sources

Explanation

Sweating is the body's main cooling mechanism, and adequate water intake sustains sweat production and blood volume. Dehydration impairs thermoregulation and reduces exercise capacity.

Question 21Nutrition

A community has high rates of dental caries among children. Which dietary change would most effectively address this?

  1. Replacing water with flavoured milk at meals
  2. Adding honey to breakfast cereal daily
  3. Reducing the frequency of sugary foods and drinks Correct answer.
  4. Increasing the frequency of sugary snack consumption

Explanation

Dental caries risk is driven strongly by how often teeth are exposed to fermentable sugars, because repeated acid attacks demineralise enamel. Reducing the frequency of sugary foods and drinks lowers that exposure.

Question 22Nutrition

Which situation best illustrates the concept of nutrient bioavailability?

  1. Spinach is greener than meat
  2. Iron from meat is absorbed more efficiently than iron from spinach Correct answer.
  3. Meat contains more kilojoules than spinach
  4. Spinach contains more iron by weight than meat

Explanation

Bioavailability refers to the proportion of a nutrient that is absorbed and used by the body. Haem iron from meat is absorbed more efficiently than the non-haem iron in plant foods such as spinach.

Question 23Nutrition

A teenager reports fatigue and is found to have low iron stores. Which dietary advice is most appropriate?

  1. Increase intake of calcium supplements with meals
  2. Avoid all plant sources of iron
  3. Consume iron-rich foods with strong tea at every meal
  4. Consume iron-rich foods with a source of vitamin C Correct answer.

Explanation

Pairing non-haem iron sources with vitamin C enhances absorption, which helps rebuild low iron stores. Tea contains tannins and calcium can compete with iron, so both should be separated from iron-rich meals.

Question 24Nutrition

A family on a limited budget wants to improve diet quality. Which strategy best balances cost with nutritional value?

  1. Purchasing imported fortified snack bars
  2. Using dried legumes, seasonal vegetables and wholegrain staples Correct answer.
  3. Buying only pre-prepared meals
  4. Relying mainly on takeaway meals

Explanation

Dried legumes, seasonal vegetables and wholegrain staples provide protein, fibre and micronutrients at low cost per serve. This approach improves nutrient density while keeping expenditure low.

Question 25Nutrition

Which explanation best accounts for the higher energy requirement of an adolescent compared with a younger child?

  1. Adolescents absorb fewer nutrients per meal
  2. Adolescents have a smaller body surface area
  3. Growth and increased lean mass raise energy needs Correct answer.
  4. Adolescents digest food more slowly

Explanation

The adolescent growth spurt adds lean tissue and increases body size, both of which raise resting energy expenditure and total needs. Growth itself also requires energy and protein for tissue synthesis.

Question 26Nutrition

Which nutrient is classified as a macronutrient because it provides energy in large amounts per gram consumed?

  1. Ascorbic acid
  2. Protein Correct answer.
  3. Iodine
  4. Iron

Explanation

Macronutrients are carbohydrates, proteins and fats, and they supply the body with energy in relatively large quantities. Protein contributes about 17 kilojoules per gram, whereas vitamins and minerals supply no energy and are needed only in small amounts.

Question 27Nutrition

Which process describes the breakdown of starch into maltose by salivary enzymes in the mouth?

  1. Mechanical digestion
  2. Absorption
  3. Peristalsis
  4. Chemical digestion Correct answer.

Explanation

Chemical digestion uses enzymes to break large molecules into smaller ones, and salivary amylase acting on starch is an example. Mechanical digestion only physically reduces food size, absorption moves nutrients across the gut wall, and peristalsis moves material along the tract.

Question 28Nutrition

Which mineral is essential for the transport of oxygen in haemoglobin?

  1. Calcium
  2. Zinc
  3. Potassium
  4. Iron Correct answer.

Explanation

Iron sits at the centre of the haem group in haemoglobin, allowing each molecule to bind oxygen for transport in the blood. Low iron stores reduce haemoglobin formation and therefore reduce oxygen-carrying capacity.

Question 29Nutrition

Which term describes the condition in which a person consumes more energy than they expend over time?

  1. Energy equilibrium
  2. Nutrient density
  3. Negative energy balance
  4. Positive energy balance Correct answer.

Explanation

Energy balance compares energy taken in through food with energy used by the body. A positive balance means intake exceeds expenditure, so surplus energy is stored, largely as fat.

Question 30Nutrition

Which food group is the richest dietary source of calcium?

  1. Dairy foods Correct answer.
  2. Citrus fruits
  3. Refined grains
  4. Root vegetables

Explanation

Milk, cheese and yoghurt provide calcium in high concentrations and in a form that is well absorbed. Plant foods such as grains, roots and citrus supply comparatively little calcium unless they are fortified.

Question 31Nutrition

Which statement correctly describes a function of protein in the body?

  1. It forms the main component of cell membranes.
  2. It provides the structural framework of enzymes and antibodies. Correct answer.
  3. It is the main storage form of energy in adipose tissue.
  4. It acts as the primary solvent for body reactions.

Explanation

Proteins are built from amino acids and include enzymes, antibodies, hormones and structural proteins such as collagen and keratin. Their roles depend on specific amino acid sequences rather than on energy storage or acting as a solvent.

Question 32Nutrition

Which term refers to the amount of a nutrient that can be absorbed and used by the body from a food?

  1. Bioavailability Correct answer.
  2. Enrichment
  3. Fortification
  4. Palatability

Explanation

Bioavailability describes the proportion of a nutrient that is absorbed and available for physiological use. It depends on food form, interactions with other substances and the individual's nutritional status.

Question 33Nutrition

A teenage athlete wants a snack that provides carbohydrate before training. Which choice best meets this need?

  1. A grilled chicken breast
  2. A banana with a slice of wholegrain bread Correct answer.
  3. A handful of salted nuts
  4. A glass of skim milk

Explanation

Carbohydrate-rich foods such as fruit and wholegrain bread supply glucose that muscles can use during exercise. The banana and bread combination provides substantial carbohydrate with some fibre for steady release.

Question 34Nutrition

A person who eats no animal products should pay particular attention to which pair of nutrients that are most likely to be inadequate?

  1. Calcium and vitamin E
  2. Potassium and vitamin A
  3. Vitamin B12 and iron Correct answer.
  4. Vitamin C and folate

Explanation

Vitamin B12 occurs naturally almost only in animal foods, and plant iron is non-haem with lower bioavailability, so both need deliberate attention in vegan diets. Fortified foods, supplements and iron-enhancing pairings help meet requirements.

Question 35Nutrition

A student eats a breakfast of white toast and honey, then feels hungry again within two hours. Which explanation best accounts for this?

  1. The meal is high in fat and delays digestion.
  2. The meal is high in refined carbohydrate and produces a rapid rise and fall in blood glucose. Correct answer.
  3. The meal is high in fibre and slows gastric emptying.
  4. The meal is high in protein and sustains satiety.

Explanation

Refined carbohydrate is digested quickly and produces a rapid rise in blood glucose followed by a relatively fast decline, which can prompt hunger. Fibre, fat and protein generally slow digestion and prolong satiety.

Question 36Nutrition

A pregnant woman is advised to increase her intake of folate. Which food choice best supports this advice?

  1. White rice with butter
  2. Fried potato chips
  3. Fortified breakfast cereal with orange juice Correct answer.
  4. Cream cheese on white crackers

Explanation

Folate is found in fortified cereals, citrus fruits, leafy greens and legumes, so cereal with orange juice is a strong source. Adequate folate around conception reduces the risk of neural tube defects.

Question 37Nutrition

Which dietary change would most effectively reduce a person's intake of saturated fat?

  1. Replacing butter with olive oil when cooking Correct answer.
  2. Adding cream to soups for flavour
  3. Choosing full-fat cheese over low-fat cheese
  4. Increasing the amount of red meat eaten

Explanation

Saturated fat raises blood cholesterol when consumed in excess, and replacing butter with a plant oil rich in monounsaturated fat lowers saturated fat intake. Red meat, cream and full-fat cheese are all notable sources of saturated fat.

Question 38Nutrition

A person with coeliac disease must avoid which component of wheat, barley and rye?

  1. Sucrose
  2. Lactose
  3. Gluten Correct answer.
  4. Pectin

Explanation

Gluten is a protein complex in wheat, barley and rye that triggers an immune reaction damaging the small intestine in coeliac disease. Removing gluten allows the intestinal lining to recover and nutrient absorption to improve.

Question 39Nutrition

An older adult living alone reports a poor appetite and unintentional weight loss. Which advice is most appropriate?

  1. Reduce protein intake to ease digestion
  2. Skip breakfast to increase hunger later in the day
  3. Replace meals with low-energy diet drinks
  4. Eat small, frequent, nutrient-dense meals and snacks Correct answer.

Explanation

Small, frequent, energy- and nutrient-dense meals help people with poor appetite meet requirements without large portions. Adequate protein is especially important to preserve muscle mass in older adults.

Question 40Nutrition

Which statement best explains why breast milk is considered nutritionally well suited to a newborn?

  1. It contains no fat, which is easy for the infant to digest.
  2. It supplies vitamin D in amounts sufficient without any supplementation.
  3. It provides antibodies and a balance of nutrients matched to infant needs. Correct answer.
  4. It is high in fibre, which supports the infant gut.

Explanation

Breast milk supplies immunoglobulins and other protective factors alongside a nutrient profile suited to the infant's digestive capacity. It is low in fibre and relatively low in vitamin D, so supplementation is often recommended.

Question 41Nutrition

A community health survey finds high rates of anaemia among women. Which intervention would most directly address the likely nutritional cause?

  1. Promoting iron-rich foods and vitamin C at meals Correct answer.
  2. Encouraging more refined sugar in the diet
  3. Reducing intake of green leafy vegetables
  4. Replacing legumes with white bread

Explanation

Iron deficiency is the most common nutritional cause of anaemia, and vitamin C enhances absorption of non-haem iron. Promoting iron-rich foods alongside vitamin C sources targets both intake and absorption.

Question 42Nutrition

Which factor best explains why a food label showing 'no added sugar' may still be high in energy?

  1. The product may contain naturally occurring sugars and fats that contribute energy. Correct answer.
  2. The product is required to be low in kilojoules.
  3. The product cannot contain any fat.
  4. The product must contain no carbohydrate at all.

Explanation

'No added sugar' refers only to sugars added during manufacture, so natural sugars and fats can still supply significant energy. Consumers must check the nutrition panel for total energy and sugar content.

Question 43Nutrition

A person with lactose intolerance wants to maintain calcium intake. Which strategy is most suitable?

  1. Choose lactose-free milk or calcium-fortified plant drinks Correct answer.
  2. Rely on red meat as the main calcium source
  3. Avoid all dairy foods permanently
  4. Increase intake of plain white rice

Explanation

Lactose-free milk provides calcium without the lactose that causes symptoms, and fortified plant drinks are useful alternatives. Many people with lactose intolerance can also tolerate small amounts of yoghurt or hard cheese.

Question 44Nutrition

Which statement best explains why dietary fibre assists in managing blood cholesterol levels?

  1. Fibre converts cholesterol into glucose in the large intestine.
  2. Soluble fibre binds bile acids, increasing their excretion and prompting the liver to use cholesterol to make more. Correct answer.
  3. Fibre prevents all fat absorption in the stomach.
  4. Insoluble fibre is absorbed directly into the bloodstream and lowers cholesterol.

Explanation

Soluble fibre such as that in oats and legumes binds bile acids so they are excreted rather than reabsorbed. The liver then draws on circulating cholesterol to synthesise replacement bile acids, which can lower blood cholesterol.

Question 45Nutrition

A student calculates that a 50-gram serving of a snack provides 1000 kilojoules. Approximately what proportion of a 2000-kilojoule daily intake does this serving supply?

  1. About 20 percent
  2. About 75 percent
  3. About 5 percent
  4. About 50 percent Correct answer.

Explanation

Dividing 1000 kilojoules by 2000 kilojoules gives 0.5, which is 50 percent of the daily intake in a single serving. This illustrates how energy-dense snacks can contribute a large share of requirements in a small portion.

Question 46Nutrition

Two cereals provide equal energy per 100 grams, but cereal A contains 8 grams of fibre and cereal B contains 1 gram. Which conclusion is most defensible?

  1. Cereal B is nutritionally superior because it has less fibre.
  2. Fibre content has no relationship to health outcomes.
  3. Cereal A is likely to promote greater satiety and better digestive health. Correct answer.
  4. The cereals must have identical nutrient profiles.

Explanation

Higher fibre content is associated with increased satiety, improved bowel function and reduced risk of several chronic diseases. Equal energy does not mean equal nutritional quality, since fibre and micronutrient content can differ markedly.

Question 47Nutrition

A patient with chronic kidney disease is advised to moderate protein intake. Which explanation best justifies this advice?

  1. Protein breakdown produces nitrogenous waste that the kidneys must excrete. Correct answer.
  2. Protein absorption occurs only in the kidneys.
  3. Excess protein is stored directly as muscle without any waste products.
  4. Protein provides no essential amino acids to the body.

Explanation

Metabolism of amino acids produces urea and other nitrogenous wastes that healthy kidneys excrete. When kidney function is impaired, moderating protein reduces the waste load the kidneys must handle.

Question 48Nutrition

A researcher compares iron status between two groups eating the same total iron but different diets: one high in vitamin C and one high in tannins from strong tea. Which outcome is most likely?

  1. Both groups will show identical iron status because total iron is equal.
  2. The vitamin C group will show better iron absorption and status. Correct answer.
  3. Neither group will absorb any iron from plant foods.
  4. The tannin-rich group will absorb more iron than the vitamin C group.

Explanation

Vitamin C reduces non-haem iron to a more absorbable form, while tannins bind iron and inhibit absorption. With equal total intake, differences in these enhancers and inhibitors can produce measurable differences in iron status.

Question 49Nutrition

A community has limited access to fresh produce but abundant cheap refined grains. Which strategy best addresses both nutrition and sustainability of supply?

  1. Advise residents to eat less overall regardless of food quality
  2. Promote fortified grain products alongside local vegetable growing schemes Correct answer.
  3. Replace grains entirely with imported supplements
  4. Import only luxury foods for a minority of residents

Explanation

Fortifying staple grains can reduce micronutrient deficiencies where fresh produce is scarce, while local growing schemes improve longer-term access to vegetables. Combining both addresses immediate nutrient gaps and builds a more resilient food supply.

Question 50Nutrition

Which nutrient is the body's most concentrated source of energy per gram?

  1. Protein
  2. Carbohydrate
  3. Alcohol
  4. Fat Correct answer.

Explanation

Fat supplies roughly 37 kilojoules per gram, which is more than double the energy provided by the same mass of carbohydrate or protein. This high energy density is because fat molecules carry many carbon-hydrogen bonds that release energy when oxidised. Alcohol also provides energy but at about 29 kilojoules per gram, so it is less concentrated than fat.