food and nutrition Flashcards
What is a GM crop?
A GM crop is a plant used in agriculture where its DNA has been modified using engineering of other types of methods.
What are Benefits of GM crops?
More nutritious, tastier, less use of pesticides, increased supply of food and faster growing plants and animals.
Why are people opposed to GM crops?
It can affect the environment, have more chemical herbicides, toxins are produced that are harmful to butterflies, moths and insect pollinators. Can harm and ruin income of small scale farmers. No culture links. You don’t even know what’s been used to make them so could worry people.
key temperatures for bacterial growth?
The key temperatures for bacterial growth are: -19 degree celsius for freezing. For chilling it should be no less than 8 degrees celsius. Danger zone is 4-60 degree celsius. 37 degrees celsius for serving food. For boiling bacterial growth food the temperature needs to be at 65 degree celsius.
What is a pathogenic organism?
Organisms, including bacteria, viruses or cysts, capable of causing diseases.
conditions needed for microorganisms to grow?
Nutrients, Ph level, temperature, nutrients, moisture.
What is a high risk food name some?
A high risk food is a pre-cooked food. For example chicken, steak, milk, cream and cheese,
How do ripening enzymes change fruit and veg properties?
They are able to change the colour for example when you cut an apple nd let it exposed to the air it will make it turn brown.
The way that lemon juice would preserve the salad is it will stop the enzymes from ripening the fruit and will stop the browning.
Yeast spoils fruit as it will break down the sugar in it and turn it into carbon dioxide.
What is the temperature range you want when re-heating food?
75 degrees Celsius.
What is the recommended temperature for chilling food?
5 degrees Celsius
What is the recommended temperature for freezing food?
-18 degrees Celsius.
What is meant by the danger zone?
What it means is that is the quickest temperature range where bacteria can grow.
how does freezing affect the shelf life of food?
Molecules can not move so microorganisms cannot grow so it preserves the food.
What is the correct way of storing uncooked meat in a fridge?
Sealed container bottom of fridge don’t eat after use by, keep away from veg, fruit and cooked foods.
What is an ambient food?
A food that can be sealed and kept at room temperature for example pasta or noodles.
What is the difference between a use by date and a best before?
Use by means the item has to be used by or on the date said unless it is put in the freezer best before is suggestion safe to eat for a while after the date.
What is cross contamination?
Cross contamination is when two microorganisms are unintentionally transferred to each other.
Give some examples of cross contamination?
Using the same chopping board for raw meats and cooked foods, meat and veg or placing uncooked meat next to cooked meat or vegetables in the fridge.
what is food poisoning?
Food poisoning is what someone gets when they consume food that has had cross contamination or has not been cooked properly.
Symptoms of food poisoning?
Throwing up food, diarrhoea, having a high temperature (above 38 degrees)
where can you find Campylobacter?
It can be found in cooked or raw foods?
What can be found in untreated water?
E coli (it can also be found in raw beef)
Where is staphylococcus aureus found?
It is found in dairy, milk and sometimes baked goods.
Give examples of bacteria that is found in raw beef?
E coli, Salmonella and Yersinia
What is the definition for a micro organism?
miniscule single celled live form or could be a colony of cells.
true or false yeast is a single celled micro organism.
True
When yeast ferments sugar what is created?
Alcohol and carbon dioxide
What is gelatinization? give an example too
The breaking down of the intermolecular starch bonds when there is a presence of heat and water allowing the hydrogen bonding sites to react more with water. Making a cheese sauce for lasagne
Caramelisation definition?
The browning of sugar from extensive heat which gives sugar a brown colour and a nutty flavour. Toasted bread, golden french fries.
Dextrinisation is what?
The process of this being created would cause a colour change in food for example bread moving from white to light brown, to brown, to dark brown, to black (burnt). Toasts.
What is the key term when using fat that has been made to rest and come up to a solid and room temperature and will be used to make a crumbling pastry.
Shortening
What is Aeration?
this is the process of making or introducing air into a liquid or viscous substance that helps raise the food. Chocolate cake
What is Emulsification?
this is the combination of two different ingredients that do not normally mix together all to easily. For example a fat and an oil. Meringues or mayonnaise
What is Enzyme browning?
is when a fruit is cut or squashed up it makes the enzymes inside of the fruit come into contact with the air and they combine and make a brown surface appear on said fruit when you cut an apple and it reacts with air.
Give examples of how to add air into a mixture?
beating, sieving, rolling, folding, whisking.
Give an example of a chemical raising agent?
baking powder. (in muffins)
What is the difference between and allergy and intolerance?
The difference between an allergy and intolerance is that an allergy means the person should not consume and sometimes touch or breathe in said allergy as it is life threatening. Whereas an intolerance means the body can not process the food or liquid consumed.
what are examples of dry cooking?
Baking, grilling, roasting and dry frying.
sources of vitamin A
liver, kidney, oily fish, eggs, cheese and any fortified cereals.
what happens if you have a vitamin A deficiency?
growth in children, dry skin, poor immunity and night blindness.
Is vitamins A,D,E and K are either a fat or water soluble vitamin which are they?
They are all fat soluble
Function of vitamin A?
light maintenance sensing cells in eyes, immune function, cell and hair growth, healthy skin
The function of fat soluble is that it enables absorption of calcium, immune system strength? Which vitamin does this
Vitamin D
What are example of vitamin D foods?
oily fish, red meat, egg yolks, fortified.
what is the function of Vitamin E?
antioxidant protects cells against premature ageing and damage from free radicals.
the following are good sources of which vitamin vegetable oils, seeds, nuts and avocado as well as soya.
vitamin E.
What happens if you have a vitamin E deficiency?
You get weakened muscles
If you have week bones and poor immune system what vitamin deficiency do you have?
Vitamin D
Function of vitamin K?
needed for blood clotting and helping wounds heal also supports bone health.
Sources of vitamin K?
leafy green vegetables, vegetable oils, cereal grains, meat and dairy.
what happens if you have a vitamin K deficiency?
without it blood would not clot and would cause persistent bleeding
What are the water soluble vitamins?
C, B1, B2, B9, B12
Sources of vitamin C?
Citrus fruits, tomatoes and tomato juice, and potatoes.
Vitamin C function?
helping to protect cells and keeping them healthy. maintaining healthy skin, blood vessels, bones and cartilage.
Scurvy is a consequence of what?
vitamin C deficiency
Function of vitamin D?
helps regulate the amount of calcium and phosphate.
What happens if you vitamin D deficiency?
rickets
How well should a toddler follow the eatwell guide?
They do not apply to the guide when they are under 2 years old. They also should not eat large meals but smaller meals throughout the day.
How well should a child follow the eatwell guide?
A child needs to start following the eatwell guide and should eat foods like mash and pasta for carbs and for calcium items like yogurt tubes and milk.
How well should a teenager follow the eatwell guide?
Now they are going through puberty it is essential that they eat a balanced diet, if a girl leafy green vegetables are vital due to having periods or if they want to have meat beef is a good option too,
How well should a early/middle aged adult follow the eatwell guide?
Due to no more growing they need to maintain a healthy diet in order to stay a good weight. Men normally require more due to their build and muscles so need more protein and carbs were as women still have their period so need to contain eating foods like spinach that are high in iron.
How well should an old person follow the eatwell guide?
AS it becomes more difficult to physically exercise at this stage they need to watch what they eat and eat less of fatty foods and foods high in energy as they will not get burnt off. They have a similar requirement as new adults but can not eat as much as them.
How common is obesity?
affects 1 in every 4 adults
What causes anaemia?
Not eating enough leafy green vegetables or red meat, periods, being pregnant
Health problems related to anaemia?
tiredness pale complexion, headaches abnormal fingernails