Tag: fats

Questions Related to fats

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.

You can find fats abundantly in 

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

  1. Wheat, rice, sugar and potatoes

  2. Ghee, oil, milk and groundnuts

  3. Soybeans, fish and meat

  4. Carrots, mangoes and lemon fruits

Show answer
Correct Option: B
Explanation:
Dietary fats are one of the three major components or macro-nutrients of all foods. The other two are carbohydrates and proteins. During digestion, dietary fats are broken down and their constituents, glycerol and fatty acids, are released. Fatty acids have many important functions in the body.
Dietary fat is a source of energy for your body. The glycerol you get along with dietary fatty acids can be converted directly into glucose by the liver. The fatty acids, however, have to go through a series of transformations before they are turned into glucose.
Here are 10 high-fat foods that are actually incredibly healthy and nutritious.
Avocado, nuts, cheese, oil, ghee, fish, milk, dark chocolates, whole egg and full fat yoghurt.

Number of essential fatty acids is

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

  1. $6$

  2. $4$

  3. $3$

  4. $2$

Show answer
Correct Option: A
Explanation:

Non-essential fatty acids are those fatty acids that the body can synthesize on its own. Essential fatty acids are those fatty acids that are required by the body but it cannot synthesize. There are two essential fatty acids, linoleic and alpha-linolenic acid. These must be obtained from food. 

Thus, the correct answer is option D.

Cow's milk is slightly yellowish in colour due to the presence of

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

  1. Carotene

  2. Riboflavin

  3. Xanthophyll

  4. Xanthophyll and carotene

Show answer
Correct Option: B
Explanation:

Because riboflavin is an orange-yellow compound, so cow's milk appears slightly yellowish.

Assertion  :Cold blooded animals have no fat layer


Reason  :  Cold blooded animals use their fat for
                   metabolic process during hibernation.




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

  1. If both the assertion and the reason are true and the reason

    is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is

    not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: B
Explanation:

The body temperature in cold blooded varies with that of the environment as there is no fat deposition. On the other hand, cold blooded animals use fat during hibernation to carry out their metabolic processes.

Which is least harmful?

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

  1. Saturated fat

  2. Oils

  3. Chloresterol

  4. Polyunsaturated fats

Show answer
Correct Option: D
Explanation:

Unsaturated fats are liquid at room temperature as they have double bonds. Saturated fatty acids have single bond and are solid at room temperature. Polyunstaurated fats are good for health as they boost up the good cholestrol level. As they are liquid so they do not choke the blood vessels and they are easily metabolized. Polyunsaturated fats include omega-3 and omega-6 fats. These are essential fatty acids that the body needs for brain function and cell growth.

So, the correct answer is option D.