Tag: food for health

Questions Related to food for health

Carotenoids are composed of units called as

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

  1. Fatty acids

  2. Amino acids

  3. Isoprene

  4. Pyran

Show answer
Correct Option: C
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.

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

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

  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

Show answer
Correct Option: A

Fats in the body are formed when

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

  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.

Show answer
Correct Option: C
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.

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

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

  1. Starch

  2. Fat

  3. Protein

  4. Glycogen

Show answer
Correct Option: B
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.

Fats and carbohydrates are together called as 

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

  1. Protective foods

  2. Harmful foods

  3. Body building foods

  4. Energy giving foods

Show answer
Correct Option: D
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.

Cholesterol is synthesised in

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

  1. Brunner's gland

  2. Pancreas

  3. Liver

  4. Spleen

Show answer
Correct Option: C
Explanation:

Slightly less than half of the cholesterol in the body derives from biosynthesis de novo. Biosynthesis in the liver accounts for approximately 10% and in the intestines approximately 15%, of the amount produced each day. The cholesterol biosynthesis pathway involves enzymes that are in the cytoplasm, microsomes (ER), and peroxisomes. Synthesis of cholesterol, like that of most biological lipids, begins from the two-carbon acetate group of acetyl-CoA. Cholesterol synthesis does not occurs in pancreas, spleen and Brunner's gland. 

So, the correct answer is 'Liver'

Oxidation of which of the following substances in the body yields more amount of calories?

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

  1. Glucose

  2. Glycogen

  3. Protein

  4. Lipids

Show answer
Correct Option: D
Explanation:

Oxidation refers to the direct breakdown of nutrients for energy. Fats or lipids have the highest energy content of 9 kcal/gm while proteins and carbohydrates have 4 kcal/gm.
Therefore, the correct answer is option D.

Name two end-products of $\beta$-oxidation of fatty acid

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

  1. Pyruvate

  2. Acetic acid

  3. $FADH _2$

  4. $NADPH _2$

Show answer
Correct Option: C,D
Explanation:

Products of $\beta$-oxidation are as follows-
a) Acetyl ${C} _{0}A$
b) $FAD{H} _{2}$
c) $NAD{H} _{2}$

Which category of compound is most concentrated energy source?

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

  1. Lipid

  2. Carbohydrates

  3. Proteins

  4. Vitamins

Show answer
Correct Option: A
Explanation:
Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. The main biological functions of lipids include storing energy, signaling, and acting as structural components of cell membranes.
Triglycerides, stored in adipose tissue, are a major form of energy storage both in animals and plants. The adipocyte, or fat cell, is designed for continuous synthesis and breakdown of triglycerides in animals, with breakdown controlled mainly by the activation of hormone-sensitive enzyme lipase. The complete oxidation of fatty acids provides high caloric content, about 9 kcal/g, compared with 4 kcal/g for the breakdown of carbohydrates and proteins. Migratory birds that must fly long distances without eating use stored energy of triglycerides to fuel their flights.

Fats 

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

  1. Are building blocks of our body

  2. Maintain metabolic rate

  3. Keep body temperature in the normal range

  4. Are stored to give energy

Show answer
Correct Option: D
Explanation:

Although, the main source of energy for our bodies is carbohydrates, fat is used as a source of backup energy in cases when carbohydrates are not available. This is a concentrated energy source but it is important to remember that each gram of fat has nine calories (over double the calories from protein and carbohydrates) so you should avoid having more than 20 to 35% of your daily calories from fat. In a 1,800 calorie diet, you should only consume 40-70 grams of fat.