Biology ยท Chemistry

Lipids, Fats, and Biochemistry

1,130 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 the process by which triglycerides are broken down into fatty acids and glycerol called?

  1. Lipolysis

  2. Glycolysis

  3. Gluconeogenesis

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

Lipolysis is the process by which triglycerides are broken down into fatty acids and glycerol.

Multiple choice

What are the main sources of triglycerides in the diet?

  1. Oils and fats

  2. Carbohydrates

  3. Proteins

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

Oils and fats are the main sources of triglycerides in the diet.

Multiple choice

What is the primary energy source for endurance athletes during prolonged exercise?

  1. Carbohydrates

  2. Proteins

  3. Fats

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

Carbohydrates are the body's primary source of energy during endurance exercise. They are broken down into glucose, which is then used by muscles for energy.

Multiple choice

What is the primary energy source for endurance activities?

  1. Carbohydrates

  2. Fats

  3. Proteins

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

Carbohydrates are the primary energy source for endurance activities because they are easily broken down and converted into energy. Fats and proteins can also be used for energy, but they are not as efficient as carbohydrates.

Multiple choice

Which type of cholesterol is considered "bad" cholesterol?

  1. HDL

  2. LDL

  3. VLDL

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

LDL (low-density lipoprotein) cholesterol is considered "bad" cholesterol because it can build up in the arteries and increase the risk of heart disease.

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

What is the primary energy source for endurance athletes during prolonged exercise?

  1. Carbohydrates

  2. Proteins

  3. Fats

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

Carbohydrates are the body's primary source of energy during endurance exercise.

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.