Biology ยท Chemistry

Lipids, Fats, and Biochemistry

1,009 Questions

Lipids, fats, and biochemistry explore the structure and function of biological molecules. This includes fatty acids, cholesterol, trans-fats, and cellular membranes. Questions on this topic frequently appear in science sections of competitive government exams.

Types of fats and lipidsCholesterol and human bodyFatty acidsCellular membranes

Lipids, Fats, and Biochemistry Questions

Multiple choice

What is shortening?

  1. A solid fat made from vegetable oils

  2. A liquid fat made from animal fat

  3. A type of butter made from milk

  4. A type of margarine made from vegetable oils
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Shortening is a solid fat made from vegetable oils that is used in baking and cooking. It is made by hydrogenating vegetable oils, which means adding hydrogen atoms to the oil molecules to make them more solid.

Multiple choice

What is lard?

  1. A solid fat made from vegetable oils

  2. A liquid fat made from animal fat

  3. A type of butter made from milk

  4. A type of margarine made from vegetable oils
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lard is a liquid fat made from animal fat, typically from pigs. It is used in cooking and baking, and it can also be used to make soap and candles.

Multiple choice

Which nutrient is responsible for the emulsification properties of egg yolk?

  1. Lecithin

  2. Cholesterol

  3. Triglycerides

  4. Phospholipids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lecithin, a type of phospholipid, is responsible for the emulsification properties of egg yolk. It helps stabilize emulsions, such as mayonnaise and hollandaise sauce.

Multiple choice

What is the maximum permissible level of trans fat in edible oils and fats as per FSSAI regulations?

  1. 0.2%

  2. 1%

  3. 2%

  4. 5%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As per FSSAI regulations, the maximum permissible level of trans fat in edible oils and fats is 0.2%. This limit is in line with the World Health Organization's (WHO) recommendation to reduce trans fat intake to less than 1% of total energy intake.

Multiple choice

What is the FSSAI's regulation on the use of antioxidants in cooking oils and fats?

  1. Antioxidants cannot be used in any cooking oil or fat.

  2. Antioxidants can be used in cooking oils and fats, but they must be declared on the label.

  3. Antioxidants can be used in cooking oils and fats, but they must not exceed 0.02% of the total fat content.

  4. Antioxidants can be used in cooking oils and fats without any restrictions.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

FSSAI regulations allow the use of antioxidants in cooking oils and fats, but they must be declared on the label. Antioxidants are used to prevent the oxidation of oils and fats, which can lead to rancidity and spoilage.

Multiple choice

What is the FSSAI's regulation on the labeling of cooking oils and fats?

  1. Cooking oils and fats must be labeled with the name of the oil or fat, the net quantity, the date of manufacture, and the best before date.

  2. Cooking oils and fats must be labeled with the name of the oil or fat, the net quantity, the date of manufacture, the best before date, and the list of ingredients.

  3. Cooking oils and fats must be labeled with the name of the oil or fat, the net quantity, the date of manufacture, the best before date, the list of ingredients, and the nutritional information.

  4. Cooking oils and fats must be labeled with the name of the oil or fat, the net quantity, the date of manufacture, the best before date, the list of ingredients, the nutritional information, and the FSSAI logo.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

FSSAI regulations require that cooking oils and fats be labeled with the name of the oil or fat, the net quantity, the date of manufacture, the best before date, the list of ingredients, the nutritional information, and the FSSAI logo.

Multiple choice

Which of the following is a type of lipid that is a major component of cell membranes?

  1. Phospholipids

  2. Triglycerides

  3. Steroids

  4. Fatty acids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phospholipids are a type of lipid that consists of a glycerol backbone, two fatty acid chains, and a phosphate group. They are the major components of cell membranes, forming a bilayer that separates the inside and outside of the cell.

Multiple choice

Which of the following is a type of lipid that is a major component of hormones and vitamins?

  1. Phospholipids

  2. Triglycerides

  3. Steroids

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

Steroids are a type of lipid that consists of four fused carbon rings. They are a major component of hormones, vitamins, and other signaling molecules in cells.

Multiple choice

Which of the following is a type of lipid that is a major component of cell membranes and nerve tissue?

  1. Phospholipids

  2. Triglycerides

  3. Steroids

  4. Fatty acids
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phospholipids are a type of lipid that consists of a glycerol backbone, two fatty acid chains, and a phosphate group. They are the major components of cell membranes, forming a bilayer that separates the inside and outside of the cell. Phospholipids are also found in nerve tissue.

Multiple choice

Which cooking oil is high in omega-3 fatty acids, which are beneficial for brain and heart health?

  1. Flaxseed oil

  2. Sunflower oil

  3. Safflower oil

  4. Corn oil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Flaxseed oil is a rich source of omega-3 fatty acids, particularly alpha-linolenic acid (ALA), which the body can convert into EPA and DHA, essential for brain and heart health.

Multiple choice

Which cooking oil is low in saturated fat and is considered a heart-healthy choice?

  1. Coconut oil

  2. Palm oil

  3. Sunflower oil

  4. Canola oil
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Canola oil is low in saturated fat and high in monounsaturated and polyunsaturated fats, making it a heart-healthy choice. It also contains omega-3 fatty acids, which are beneficial for brain and heart health.

Multiple choice

Which cooking oil is a good source of conjugated linoleic acid (CLA), which has been linked to several health benefits?

  1. Safflower oil

  2. Rice bran oil

  3. Corn oil

  4. Butter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Safflower oil is a good source of conjugated linoleic acid (CLA), a type of fatty acid that has been linked to several health benefits, including reduced risk of heart disease, cancer, and inflammation.

Multiple choice

Which cooking oil is a good source of omega-6 fatty acids, which are essential for brain and immune system function?

  1. Soybean oil

  2. Cottonseed oil

  3. Lard

  4. Olive oil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Soybean oil is a good source of omega-6 fatty acids, including linoleic acid, which is essential for brain and immune system function. It also contains omega-3 fatty acids, although in smaller amounts.

Multiple choice

Which cooking oil is a good source of gamma-linolenic acid (GLA), a fatty acid that has been linked to several health benefits?

  1. Borage oil

  2. Evening primrose oil

  3. Black currant seed oil

  4. Safflower oil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Borage oil is a good source of gamma-linolenic acid (GLA), a fatty acid that has been linked to several health benefits, including reduced inflammation, improved skin health, and relief from PMS symptoms.

Multiple choice

Which type of cholesterol is commonly referred to as the "good" cholesterol?

  1. High-density lipoprotein (HDL)

  2. Low-density lipoprotein (LDL)

  3. Very-low-density lipoprotein (VLDL)

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

HDL cholesterol helps remove excess cholesterol from the arteries and transport it back to the liver for removal from the body.