CSEC Food and Nutrition Study Guide: Q&A Edition

  

Studying for CSEC Food and Nutrition? This guide breaks down the core syllabus topics into simple questions and answers so you can review quickly, test yourself, and actually remember what you've learned. Bookmark it, print it, or just scroll back to it before your next exam.

1. Nutrients and Their Functions

Q: What are the six classes of nutrients?

A: Carbohydrates, proteins, fats, vitamins, minerals, and water.

Q: What is the main function of carbohydrates in the body?

A: They provide energy. Excess carbohydrates that aren't used for energy are stored in the body as fat.

Q: What are the three types of carbohydrates?

A: Sugars (simple carbohydrates), starches (complex carbohydrates), and fibre/cellulose (roughage).

Q: Name three food sources of carbohydrates.

A: Rice, bread, ground provisions (like yam, potato, cassava), pasta, and sugar.

Q: What is the function of protein in the body?

A: Protein is needed for growth, repair, and maintenance of body tissues. It can also provide energy in emergencies.

Q: What's the difference between first-class and second-class proteins?

A: First-class (complete) proteins come from animal sources and contain all the essential amino acids the body needs — think eggs, meat, fish, milk. Second-class (incomplete) proteins come from plant sources and are usually missing one or more essential amino acids — think beans, peas, and grains.

Q: What is complementary protein, and why does it matter?

A: Combining two incomplete plant proteins so that together they supply all the essential amino acids — for example, rice and peas, or beans and corn. It matters because it allows people who eat little or no animal protein to still get complete protein.

Q: What are the functions of fats in the body?

A: Fats provide a concentrated source of energy, insulate the body against heat loss, protect organs, and carry the fat-soluble vitamins (A, D, E, K).

Q: What's the difference between saturated and unsaturated fats?

A: Saturated fats are usually solid at room temperature and come mainly from animal sources (butter, lard, cheese) — too much can raise cholesterol. Unsaturated fats are usually liquid at room temperature and come from plant sources (olive oil, vegetable oil, avocado) — they're generally considered healthier.

Q: List the fat-soluble vitamins and one function of each.

A:

Vitamin A – supports vision and healthy skin

Vitamin D – helps the body absorb calcium for strong bones and teeth

Vitamin E – acts as an antioxidant, protecting cells

Vitamin K – helps blood to clot properly

Q: List the water-soluble vitamins.

A: Vitamin C and the B-complex vitamins (B1, B2, B3, B6, B12, folic acid, etc.).

Q: What is the main function of Vitamin C, and what happens if you don't get enough?

A: Vitamin C helps heal wounds, keeps gums and skin healthy, and helps the body absorb iron. A deficiency causes scurvy, which leads to bleeding gums and slow wound healing.

Q: Why are water-soluble vitamins "riskier" to lose during cooking than fat-soluble ones?

A: Because they dissolve in water and are destroyed by heat, so boiling vegetables for too long — or in too much water — can wash away or destroy Vitamin C and B vitamins.

Q: Name two major minerals and their functions.

A: Calcium builds strong bones and teeth and helps with blood clotting. Iron is needed to make haemoglobin, which carries oxygen in the blood.

Q: What deficiency disease is linked to a lack of iron?

A: Anaemia — symptoms include tiredness, paleness, and shortness of breath.

Q: Why is water considered an essential nutrient?

A: It regulates body temperature, transports nutrients and waste, aids digestion, and is essential for almost every body process. A person can survive much longer without food than without water.

2. Deficiency Diseases

Q: What is Kwashiorkor and what causes it?

A: A protein-deficiency disease common in young children, caused by a diet very low in protein even if energy (calorie) intake is adequate. Symptoms include a swollen belly, thinning hair, and stunted growth.

Q: What is Marasmus and how is it different from Kwashiorkor?

A: Marasmus is caused by a severe deficiency of both protein AND energy (calories) — essentially starvation. Unlike Kwashiorkor, there is no swelling; instead the body appears extremely thin and wasted.

Q: What causes rickets and who is most at risk?

A: A deficiency of Vitamin D and/or calcium, causing soft, weak bones that can bow under body weight. Growing children are most at risk.

Q: What causes goitre?

A: A deficiency of iodine, which leads to swelling of the thyroid gland in the neck.

Q: What causes night blindness?

A: A deficiency of Vitamin A, which affects the eyes' ability to adjust to low light.

3. Meal Planning and Special Diets

Q: What factors should you consider when planning a meal?

A: Nutritional needs of the individual/family, age, occupation/activity level, budget, food preferences, availability of food, time available for preparation, and any special dietary needs.

Q: What is a balanced diet?

A: A diet that provides all the nutrients the body needs, in the right proportions, to maintain good health and normal growth.

Q: What is the "food guide" or food group system used to plan balanced meals?

A: Foods are grouped into categories — such as staples (carbohydrates), body-building foods (proteins), protective foods (fruits and vegetables), and fats/oils — and a balanced meal includes choices from each group.

Q: How should meal planning differ for a pregnant woman?

A: She needs extra protein, iron, calcium, and folic acid to support the growth of the baby and her own increased blood volume, along with adequate energy intake.

Q: How should meal planning differ for an infant?

A: Infants need foods that are soft, easily digestible, and nutrient-dense (like pureed fruits, vegetables, and cereals), introduced gradually, with breast milk or formula as the main source of nutrition early on.

Q: How should meal planning differ for the elderly?

A: Elderly people often need fewer calories (due to lower activity) but still need adequate protein, calcium, and fibre. Foods should be easy to chew and digest, and diets should account for conditions like hypertension or diabetes.

Q: What dietary adjustments are needed for a diabetic?

A: Controlled and consistent carbohydrate intake, limiting sugary foods, choosing high-fibre complex carbohydrates, and eating regular, balanced meals to help manage blood sugar.

Q: What dietary adjustments are needed for someone with hypertension (high blood pressure)?

A: Reduce salt (sodium) intake, limit processed and fried foods, and increase fruits, vegetables, and potassium-rich foods.

4. Food Preparation and Cookery Methods

Q: What are the main methods of cooking food?

A: Boiling, steaming, stewing, roasting, baking, grilling/broiling, frying, and microwaving.

Q: What is the difference between boiling and stewing?

A: Boiling cooks food rapidly in a large amount of liquid at a rolling boil. Stewing cooks food slowly in a small amount of liquid at a gentle simmer, which helps tenderize tougher cuts of meat and blend flavours.

Q: Why is steaming considered a healthier cooking method than boiling?

A: Because the food doesn't sit directly in water, fewer water-soluble vitamins and minerals are lost into the cooking liquid.

Q: What is the difference between roasting and baking?

A: Roasting typically refers to cooking meats or vegetables uncovered in an oven using dry heat, often with fat. Baking usually refers to cooking batters and doughs (breads, cakes) using dry oven heat.

Q: What is the danger zone for food temperature, and why does it matter?

A: The temperature range (roughly 5°C to 60°C / 41°F to 140°F) in which bacteria multiply most rapidly. Food should not be left in this range for more than two hours to reduce the risk of food poisoning.

Q: What are the basic rules of food hygiene in the kitchen?

A: Wash hands before handling food, keep raw and cooked foods separate, use clean utensils and surfaces, store food at correct temperatures, and cook food thoroughly.

5. Food Preservation

Q: What is food preservation and why is it important?

A: The process of treating and handling food to stop or slow down spoilage, so it can be stored safely for longer. It reduces waste, saves money, and ensures food is available out of season.

Q: What are common methods of food preservation?

A: Canning, freezing, drying/dehydration, salting, smoking, pickling, and the use of sugar (as in jams).

Q: How does freezing preserve food?

A: Low temperatures slow down the growth of microorganisms and enzyme activity that cause spoilage.

Q: How does salting preserve food?

A: Salt draws moisture out of food through osmosis, creating an environment where bacteria cannot easily grow.

Q: How does canning preserve food?

A: Food is sealed in an airtight container and heated to a temperature that destroys microorganisms, then the seal prevents new contamination.

Q: What causes food spoilage?

A: The action of microorganisms (bacteria, yeast, mould), enzymes naturally present in food, and environmental factors like heat, air, and moisture.

6. Consumer Education

Q: What information must appear on a food label?

A: Product name, list of ingredients (in descending order by weight), net weight/volume, nutritional information, expiry or "best before" date, storage instructions, and manufacturer's details.

Q: What is the difference between a "use by" date and a "best before" date?

A: "Use by" is a safety date — the food should not be eaten after this date. "Best before" is a quality date — the food is still safe after this date but may not be at its best in taste or texture.

Q: What factors should a consumer consider when buying food?

A: Price, quality, nutritional value, freshness, packaging, brand reputation, and personal/family needs.

Q: What is meant by a "food additive"?

A: A substance added to food during preparation or processing to improve flavour, colour, texture, or shelf life (e.g., preservatives, colourings, flavour enhancers).

7. Digestion

Q: What is digestion?

A: The process by which food is broken down mechanically and chemically into smaller molecules that the body can absorb and use.

Q: What are the main organs of the digestive system, in order?

A: Mouth, oesophagus, stomach, small intestine, large intestine, rectum, and anus — with the liver, gallbladder, and pancreas assisting along the way.

Q: What happens to food in the mouth?

A: Chewing (mastication) breaks food into smaller pieces, and saliva (containing the enzyme amylase) begins breaking down starches.

Q: What happens to food in the stomach?

A: Gastric juices, including hydrochloric acid and the enzyme pepsin, break down proteins, and the stomach churns food into a semi-liquid mixture called chyme.

Q: Where does most nutrient absorption take place?

A: In the small intestine, where nutrients pass through the intestinal walls into the bloodstream.

Q: What is the role of the large intestine?

A: It absorbs water from the remaining undigested food and forms solid waste (faeces) for elimination.

Quick Revision Checklist

Before your exam, make sure you can:

[ ] List all six nutrient classes and their functions

[ ] Explain the difference between complete and incomplete proteins

[ ] Name at least one deficiency disease per major nutrient

[ ] Describe how to plan a meal for different life stages and health conditions

[ ] Compare at least four cooking methods

[ ] Explain three methods of food preservation and how each works

[ ] Read and interpret a food label

[ ] Trace the path of food through the digestive system

Good luck with your studies — consistent short review sessions using questions like these will help the information stick far better than one long cram session.