Doc Brown's KS3 biology Quiz Food, diet, nutrition, digestion system and health issues for AQA KS3 science courses practice questions Edexcel OCR KS3 science courses

A healthy diet needs a balance of many things. Which is a main source of energy? [8a-1]
1. carbohydrates
2. protein
3. water
4. fibre
5. vitamins
6. minerals
A healthy diet needs a balance of many things. Which is specifically tissue muscle repairs? [8a-2]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Which is the nutrient solvent for the chemical reactions of life? [8a-3]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Which is important for the bowel to help avoid constipation? [8a-4]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. vitamins
A healthy diet needs a balance of many things. Which is an energy store and organ heat insulator? [8a-5]
1. vitamins
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Which is needed in small amounts for good health? [8a-6]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Which is needed in small amounts for good health? [8a-7]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. vitamins
A healthy diet needs a balance of many things. Bread, potatoes and pasta are ALL good sources of? [8a-8]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. vitamins
A healthy diet needs a balance of many things. Meat, fish and cheese are ALL good sources of? [8a-9]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Drinks are the main sources of? [8a-10]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. vitamins
A healthy diet needs a balance of many things. Vegetables and wholemeal bread are ALL good sources of? [8a-11]
1. fats
2. protein
3. water
4. fibre
5. fats
A healthy diet needs a balance of many things. Butter, olive oil and margarine are ALL good sources of? [8a-12]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Fruit, vegetables and table salt are ALL a good sources of? [8a-13]
1. carbohydrates
2. protein
3. water
4. fibre
5. fats
6. minerals
A healthy diet needs a balance of many things. Fruit and vegetables are ALL good sources of essential? [8a-14]
1. carbohydrates
2. protein
3. water
4. fats
5. vitamins
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following dietary needs is mainly obtained from milk and cheese? [8a-15]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following dietary needs is mainly obtained from liver and green vegetables? [8a-16]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following dietary needs is mainly obtained from vegetables and fruit, but not meat? [8a-17]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following dietary needs is obtained from table salt? [8a-18]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following dietary needs can be obtained from toothpaste? [8a-19]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following part of our diet is needed for bone and teeth structure? [8a-20]
1. calcium
2. iron
3. vitamin C
4. sodium
5. potassium
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following part of our diet is needed for haemoglobin in red blood cells? [8a-21]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following part of our diet is specifically needed for healthy tissue like skin? [8a-22]
1. calcium
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following ions is needed for nerve function? [8a-23]
1. fluoride
2. iron
3. vitamin C
4. sodium
5. fluorine
Small amounts of minerals and vitamins are needed for good health and vitality!
Which of the following part of our diet is needed for hardening teeth enamel? [8a-24]
1. potassium
2. iron
3. vitamin C
4. sodium
5. fluorine
Which describes what happens in the mouth? [8a-25]
1. food mechanically broken into small pieces, enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
Which describes what happens in the stomach? [8a-26]
1. food mechanically broken into small pieces, enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
Which describes what happens in the small intestine? [8a-27]
1. food mechanically broken into small pieces, enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
Which describes what happens in the large intestine? [8a-28]
1. food mechanically broken into small pieces, enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
Which of the following are large molecules broken down to small molecules by the enzymes in saliva? [8a-29]
1. carbohydrates
2. protein
3. water
4. fibre
5. vitamins
Which of the following are large molecules broken down to small molecules by the enzymes and acid in the stomach? [8a-30]
1. minerals
2. protein
3. water
4. fibre
5. vitamins
Which of the following is the most abundant type of molecule in the body? [8a-31]
1. carbohydrates
2. protein
3. water
4. fibre
5. fat
Which of the following is least likely to be NOT fully digested and NOT absorbed by the small intestine? [8a-32]
1. carbohydrates
2. protein
3. water
4. fibre
5. minerals
Which of the following are small molecules or ions that can be directly absorbed by the small intestine without prior digestion? [8a-33]
1. fibre
2. protein
3. fat
4. mineral ions
5. carbohydrates
Which of the following are small molecules that can often be directly absorbed by the small intestine without prior digestion? [8a-34]
1. vitamins
2. fat
3. protein
4. fibre
Which of the following are large molecules broken down by alkali and enzymes to small molecules in the small intestine? [8a-35]
1. vitamins
2. fat
3. minerals
4. fibre
Which of the following are small molecules that can be directly absorbed by the small intestine without digestion of larger molecules? [8a-36]
1. protein
2. fat
3. sugar
4. fibre
5. starch
Which of the following will a marathon runner most likely eat more of, over the few days before a race? [8a-37]
1. carbohydrates
2. protein
3. minerals
4. fibre
Which of the following will a weight lifter most likely eat more of than usual in a training period? [8a-38]
1. fats
2. protein
3. minerals
4. fibre
Which of the following if eaten too much causes a person to become too overweight? [8a-39]
1. vitamins
2. protein
3. carbohydrates
4. fibre
Which of the following specifically helps bowel function and reduce risk of colon cancer? [8a-40]
1. carbohydrates
2. protein
3. sugars
4. fibre
Which of the following is NOT true about diet and digestion? [8a-41]
1. excess carbohydrate may be converted into protein
2. amino acids from protein cannot be stored in the body and the excess is excreted as urea
3. a constant supply of glucose circulates in the blood
4. food molecules are absorbed into the blood stream through membranes in the small intestine
Which of the following is NOT true about diet and digestion? [8a-42]
1. excess carbohydrate may be converted into fat
2. amino acids from protein can be stored in the body and used when required for growth and repair
3. a constant supply of glucose circulates in the blood
4. food molecules are absorbed into the blood stream through membranes in the small intestine
Which of the following is NOT true about diet and digestion? [8a-43]
1. excess carbohydrate may be converted into fat
2. amino acids from protein cannot be stored in the body and the excess is excreted as urea
3. glucose is stored in the body and released into the blood stream when needed
4. food molecules are absorbed into the blood stream through membranes in the small intestine
Which of the following is NOT true about diet and digestion? [8a-44]
1. excess carbohydrate may be converted into fat
2. amino acids from protein cannot be stored in the body and the excess is excreted as urea
3. a constant supply of glucose circulates in the blood
4. food molecules are absorbed into the blood stream through membranes in the stomach
Which of the following is NOT true about diet and digestion? [8a-45]
1. excess glucose is converted by the liver into water and carbon dioxide
2. eating vegetable oils rather than animal fats can reduce heart disease
3. digestion means breaking down large food molecules into small molecules which can be absorbed into the bloodstream
4. sugars, vitamins and minerals are small enough molecules to be absorbed directly into the bloodstream
5. protein, carbohydrates and fat molecules are too large to be directly absorbed into the bloodstream
Which of the following is NOT true about diet and digestion? [8a-46]
1. excess glucose is converted by the liver into glycogen which acts as a store of energy
2. eating animal fats rather than vegetable oils can reduce heart disease
3. digestion means breaking down large food molecules into small molecules which can be absorbed into the bloodstream
4. sugars, vitamins and minerals are small enough molecules to be absorbed directly into the bloodstream
5. protein, carbohydrates and fat molecules are too large to be directly absorbed into the bloodstream
Which of the following is NOT true about diet and digestion? [8a-47]
1. excess glucose is converted by the liver into glycogen which acts as a store of energy
2. eating vegetable oils rather than animal fats can reduce heart disease
3. digestion means combining small food molecules into larger molecules which can be used for growth and tissue repair
4. sugars, vitamins and minerals are small enough molecules to be absorbed directly into the bloodstream
5. protein, carbohydrates and fat molecules are too large to be directly absorbed into the bloodstream
Which of the following is NOT true about diet and digestion? [8a-48]
1. excess glucose is converted by the liver into glycogen which acts as a store of energy
2. eating vegetable oils rather than animal fats can reduce heart disease
3. digestion means breaking down large food molecules into small molecules which can be absorbed into the bloodstream
4. sugars, vitamins and mineral molecules are too large to be absorbed directly into the bloodstream
5. protein, carbohydrates and fat are large molecules
Which of the following is NOT true about diet and digestion? [8a-49]
1. excess glucose is converted by the liver into glycogen which acts as a store of energy
2. eating vegetable oils rather than animal fats can reduce heart disease
3. digestion means breaking down large food molecules into small molecules which can be absorbed into the bloodstream
4. sugars, vitamins and minerals are small enough molecules to be absorbed directly into the bloodstream
5. protein, carbohydrates and fat can be slowly absorbed into the bloodstream without being broken down into smaller molecules
Which part of the digestive system is the mouth? [8a-50]
1. part T
2. part U
3. part W
4. part X
5. part Y
Which part of the digestive system is the gullet? [8a-51]
1. part T
2. part U
3. part W
4. part X
5. part Y
Which part of the digestive system is the stomach? [8a-52]
1. part T
2. part U
3. part W
4. part X
5. part Y
Which part of the digestive system is the small intestine? [8a-53]
1. part T
2. part U
3. part W
4. part X
5. part Y
Which part of the digestive system is the large intestine? [8a-5]
1. part T
2. part U
3. part W
4. part X
5. part Y
What happens in part T of the digestion system? [8a-55]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in part W of the digestion system? [8a-56]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in part X of the digestion system? [8a-57]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in part Y of the digestion system? [8a-58]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in the mouth T of the digestion system? [8a-59]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in the stomach W of the digestion system? [8a-60]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in the small intestine X of the digestion system? [8a-61]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
What happens in the large intestine Y of the digestion system? [8a-62]
1. food is mechanically broken into small pieces and enzymes from saliva added
2. food mixed with gastric juices, hydrochloric acid kills most harmful bacteria, creates pH to break down protein
3. alkali neutralises acid and helps break down fats, small food molecules absorbed into bloodstream
4. excess water absorbed into bloodstream, undigested waste converted to faeces
[8a-63] Which of the following corresponds to the liver?
1. Makes bile that breaks down fats, it is alkaline so the enzymes can work at the right pH.
2. Contains glandular tissue which makes 3 important enzymes for digestion. Protease to break down proteins, carbohydrase to break down carbohydrates and lipase to break down fats.
3. Links the mouth to the stomach.
4. Contains undigested food stored a faeces.
[8a-64] Which of the following corresponds to the pancreas?
1. Makes bile that breaks down fats, it is alkaline so the enzymes can work at the right pH.
2. Contains glandular tissue which makes 3 important enzymes for digestion. Protease to break down proteins, carbohydrase to break down carbohydrates and lipase to break down fats.
3. Links the mouth to the stomach.
4. Contains undigested food stored a faeces.
[8a-65] Which of the following corresponds to the oesophagus?
1. Makes bile that breaks down fats, it is alkaline so the enzymes can work at the right pH.
2. Contains glandular tissue which makes 3 important enzymes for digestion. Protease to break down proteins, carbohydrase to break down carbohydrates and lipase to break down fats.
3. Links the mouth to the stomach.
4. Contains undigested food stored a faeces.
[8a-66] Which of the following corresponds to the rectum?
1. Makes bile that breaks down fats, it is alkaline so the enzymes can work at the right pH.
2. Contains glandular tissue which makes 3 important enzymes for digestion. Protease to break down proteins, carbohydrase to break down carbohydrates and lipase to break down fats.
3. Links the mouth to the stomach.
4. Contains undigested food stored a faeces.
[8a-67] Read carefully and judge which of the following statements is NOT completely true about your digestion system and its functions?
1. Enzymes are biological catalysts and primarily help speed up the break down of large soluble food molecules into small insoluble molecules.
2. Small molecules can pass through the gut wall and diffuse into the blood stream and then diffuse into the body's cells.
3. The small intestine is covered in millions of tiny villi which have a thin layer of surface cells, a good blood supply and a very large surface area.
4. Large molecules cannot pass through the gut wall and diffuse into the blood stream.
5. Gut bacteria are very important and make useful molecules including enzymes, vitamins and hormones.
[8a-67] Read carefully and judge which of the following statements is NOT completely true about your digestion system and its functions?
1. Enzymes are biological catalysts and primarily help speed up the break down of large food molecules into small soluble molecules.
2. Large molecules can pass through the gut wall and diffuse into the blood stream and then diffuse into the body's cells.
3. The small intestine is covered in millions of tiny villi which have a thin layer of surface cells, a good blood supply and a very large surface area.
4. Large molecules cannot pass through the gut wall and diffuse into the blood stream.
5. Gut bacteria are very important and make useful molecules including enzymes, vitamins and hormones.
[8a-67] Read carefully and judge which of the following statements is NOT completely true about your digestion system and its functions?
1. Enzymes are biological catalysts and primarily help speed up the break down of large food molecules into small soluble molecules.
2. Small molecules can pass through the gut wall and diffuse into the blood stream and then diffuse into the body's cells.
3. The small intestine is covered in dozens of tiny villi which have a thick surface layer of cells, a good blood supply and a small large surface area.
4. Large molecules cannot pass through the gut wall and diffuse into the blood stream.
5. Gut bacteria are very important and make useful molecules including enzymes, vitamins and hormones.
[8a-67] Read carefully and judge which of the following statements is NOT completely true about your digestion system and its functions?
1. Enzymes are biological catalysts and primarily help speed up the break down of large food molecules into small soluble molecules.
2. Small molecules can pass through the gut wall and diffuse into the blood stream and then diffuse into the body's cells.
3. The small intestine is covered in millions of tiny villi which have a thin layer of surface cells, a good blood supply and a very large surface area.
4. Large molecules can pass through the villi and diffuse into the blood stream.
5. Gut bacteria are very important and make useful molecules including enzymes, vitamins and hormones.
[8a-71] Read carefully and judge which of the following statements is NOT completely true about your digestion system and its functions?
1. Enzymes are biological catalysts and primarily help speed up the break down of large food molecules into small soluble molecules.
2. Small molecules can pass through the gut wall and diffuse into the blood stream and then diffuse into the body's cells.
3. The small intestine is covered in millions of tiny villi which have a thin layer of surface cells, a good blood supply and a very large surface area.
4. Large molecules cannot pass through the gut wall and diffuse into the blood stream.
5. Gut bacteria can be harmful and cannot make useful molecules.
Which of the following is NOT true about drinking alcoholic beverages? [9b-33]
1. a little alcohol can cause serious liver damage
2. harmful alcohol can reach an unborn baby through the placenta
3. alcoholic drinks tend to slow down your reactions
4. alcohol is rapidly absorbed into your bloodstream from the stomach
Which of the following is NOT true about drinking alcoholic beverages? [9b-34]
1. too much alcohol can cause serious liver damage
2. alcohol cannot reach an unborn baby through the placenta
3. alcoholic drinks tend to slow down your reactions
4. alcohol is rapidly absorbed into your bloodstream from the stomach
Which of the following is NOT true about drinking alcoholic beverages? [9b-35]
1. too much alcohol can cause serious liver damage
2. harmful alcohol can reach an unborn baby through the placenta
3. alcoholic drinks tend to speed up your reactions
4. alcohol is rapidly absorbed into your bloodstream from the stomach
Which of the following is NOT true about drinking alcoholic beverages? [9b-36]
1. too much alcohol can cause serious liver damage
2. harmful alcohol can reach an unborn baby through the placenta
3. alcoholic drinks tend to slow down your reactions
4. alcohol is only slowly absorbed into your bloodstream from the stomach
Which of the following is most likely to be TRUE about disease trends over the last hundred years in the developed world? [9b-50]
1. heart disease is increasing due to our richer and more fatty diet
2. diabetes is increasing because we eat more protein in the form of meat
3. cases of measles have decreased mainly due to better living conditions
4. tuberculosis (TB) has increased due to more people smoking
5. lung cancer is increasing because of increased air pollution
Which of the following is most likely to be TRUE about disease trends over the last hundred years in the developed world? [9b-51]
1. heart disease is decreasing due to our more nutritious diet
2. diabetes is increasing because of our richer and more fatty diet
3. cases of measles have decreased mainly due to better living conditions
4. tuberculosis (TB) has increased due to more people smoking
5. lung cancer is increasing because of increased air pollution
Which of the following is most likely to be TRUE about disease trends over the last hundred years in the developed world? [9b-52]
1. heart disease is decreasing due to our more nutritious diet
2. diabetes is increasing because we eat more protein in the form of meat
3. cases of measles have decreased mainly due to immunisation by vaccination
4. tuberculosis (TB) has increased due to more people smoking
5. lung cancer is increasing because of increased air pollution
Which of the following is most likely to be TRUE about disease trends over the last hundred years in the developed world? [9b-53]
1. heart disease is decreasing due to our more nutritious diet
2. diabetes is increasing because we eat more protein in the form of meat
3. cases of measles have decreased mainly due to better living conditions
4. tuberculosis (TB) has decreased due to better living conditions and vaccination
5. lung cancer is increasing because of increased air pollution
Which of the following is most likely to be TRUE about disease trends over the last hundred years in the developed world? [9b-54]
1. heart disease is decreasing due to our more nutritious diet
2. diabetes is increasing because we eat more protein in the form of meat
3. cases of measles have decreased mainly due to better living conditions
4. tuberculosis (TB) has increased due to more people smoking
5. lung cancer is increasing because more people who can afford to smoke, do smoke
The health and function of which system(s) is generally, and most likely improved by eating vegetables? [9b-60]
1. respiratory system
2. digestive system
3. circulatory system and respiratory system
4. reproductive system
5. skeletal system and circulatory system
The health and function of which system(s) is generally, and most likely improved by reducing fatty foods in a diet? [9b-61]
1. muscle system and skeletal system
2. digestive system
3. circulatory system
4. reproductive system
5. skeletal system
The health and function of which system(s) is generally, and most likely improved by a diet containing adequate calcium? [9b-63]
1. respiratory system
2. digestive system
3. circulatory system
4. reproductive system
5. skeletal system
Which of the following can be caused by too much fat in the diet? [9b-65]
1. excess weight, deposits in arteries, raised blood pressure
2. constipation, poor skin quality
3. rickets - 'bow legged'
4. 'skinny' and 'pot bellied'
Which of the following can be caused by too much salt in the diet? [9b-67]
1. excess weight, deposits in arteries
2. constipation, poor skin quality
3. increased blood pressure
4. 'skinny' and 'pot bellied'
Which of the following can be caused by too little protein in the diet? [9b-68]
1. excess weight, deposits in arteries, raised blood pressure
2. constipation, poor skin quality
3. increased blood pressure
4. 'skinny' and 'pot bellied'

KS3 biology Quiz: Food, diet, nutrition, digestion system and health issues