Tag: fats and their test

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Multiple choice biology food for health fats fats and their test different nutrients in food

The ultimate source of energy in human beings is

  1. Fats

  2. Carbohydrates

  3. Proteins

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fats are broken down into free fatty acids (FFA) and triglycerides which can produce ATP through chemical reactions.

Fatty acids either circulate in the blood or are stored as triglycerides in adipose tissue and muscle.
Fat is a very energy dense nutrient, one gram of it provides nine calories of energy. 
Despite the large quantity of available energy that fat has it provides this energy at a much slower rate than carbohydrate. This is because the chemical reactions required for its breakdown are much more complex and time consuming. 

Multiple choice biology food for health fats fats and their test different nutrients in food

Which of the following has the highest calories per gram?

  1. Proteins

  2. Fats

  3. Sugar

  4. Glucose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Calories are needed to provide energy so the body functions properly. The number of calories in a food depends on the amount of energy the food provides. The number of calories a person needs depends on age, height, weight, gender, and activity level. People who consume more calories than they burn off in normal daily activity or during exercise are more likely to be overweight.

The amount of energy one will get from carbohydrate, protein and fat is measured in calories per gram. Fats have the most energy and proteins have the same amount as carbohydrates, but their value as a source of energy is determined by more than the calories gained from one gram.
Fat: 1 gram = 9 calories 
Protein: 1 gram = 4 calories 
Carbohydrates: 1 gram = 4 calories

Therefore, the correct answer is option B.

Multiple choice biology food for health fats fats and their test different nutrients in food

Saturated fat is

  1. Solid at room temperature

  2. Has fatty acids with no double bonds between the carbon atoms

  3. Is of animal origin.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saturated fats are simply fat molecules that have no double bonds between carbon molecules because they are saturated with hydrogen molecules. These are typically solid at room temperature and are found in animals.

So the correct option is 'All of the above'.

Multiple choice biology food for health fats fats and their test different nutrients in food

Which compound produces more than twice the amount of energy as compared to carbohydrates?

  1. Protein

  2. Fats

  3. Vitamins

  4. Glucose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbohydrates are the primary fuel used in cellular metabolism. Excess carbohydrates are stored as glycogen and fats. The fats are a very concentrated source of energy. One gram of fat provides 8.8 kcal of energy as against 4.2 kcal provided by one gram of carbohydrate.

Multiple choice biology food for health fats fats and their test different nutrients in food

Carotenoids are composed of units called as

  1. Fatty acids

  2. Amino acids

  3. Isoprene

  4. Pyran
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carotenoids are organic pigments that are found in the chloroplasts and chromoplasts of plants and some other photosynthetic organisms, including some bacteria and some fungi. Carotenoids can be produced from fats and other basic organic metabolic building blocks by all these organisms. All carotenoids are tetraterpenoids, meaning that they are produced from 8 isoprene molecules and contain 40 carbon atoms.

Multiple choice biology food for health fats fats and their test different nutrients in food

Neutral fats are different from carbohydrates in which of the following manners? 

  1. Neutral fats have more oxygen atoms than carbon atoms are compared to carbohydrate

  2. Neutral fats have fewer oxygen atoms than carbon atoms as compared to carbohydrates

  3. Neutral fats do not have oxygen atoms but carbohydrates contain oxygen atoms but carbohydrates contain oxygen atom

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neutral fats (triglycerides) have a significantly higher proportion of carbon and hydrogen compared to oxygen than carbohydrates do. Carbohydrates generally have a 2:1 ratio of hydrogen to oxygen, while fats are much more oxygen poor.

Multiple choice biology food for health fats fats and their test different nutrients in food

Fats in the body are formed when

  1. Glycogen is formed from glucose.

  2. Sugar level becomes stable in blood.

  3. Extra glycogen storage in liver and muscles is stopped.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbohydrates are the preferred fuel for cellular respiration. Excess carbohydrates are stored as glycogen in muscles and liver. Glycogen storage is for short duration only. Glycogen reserves meet energy demand between meals and during intense physical exercises. Long term storage of carbohydrates occurs as fats. After storing glycogen, still extra carbohydrates available are converted to fats for long term storage in the body.

Multiple choice biology food for health fats fats and their test different nutrients in food

The molecule used by most animals for long term energy storage is

  1. Starch

  2. Fat

  3. Protein

  4. Glycogen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The fats contain more energy per gram than carbohydrates and as a result of this, the body tends to use fat to store energy over long periods of time and uses carbohydrates to store energy short-term.
Therefore, the correct answer is option B.

Multiple choice biology food for health fats fats and their test different nutrients in food

Fats and carbohydrates are together called as 

  1. Protective foods

  2. Harmful foods

  3. Body building foods

  4. Energy giving foods
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

We need energy for doing work. Energy is provided by carbohydrates and fats. Carbohydrates and fats on oxidation liberate energy. As compared to fats, carbohydrates get easily oxidized and converted into glucose and provide energy. One gram of carbohydrate yields about 17 kilo-joule of energy, whereas one gram of fat produces 37 kilo-joule of energy. This is the reason why carbohydrates and fats are called as energy food.