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

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

What is the primary energy source for endurance activities lasting longer than 2 minutes?

  1. Carbohydrates

  2. Proteins

  3. Fats

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

Carbohydrates are the primary energy source for endurance activities because they can be broken down quickly and efficiently to produce energy.

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.

Multiple choice

Which type of cholesterol is considered the most harmful to cardiovascular health?

  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
B Correct answer
Explanation

High levels of LDL cholesterol can lead to the buildup of plaque in the arteries, increasing the risk of heart disease and stroke.

Multiple choice

Which type of cholesterol is primarily responsible for carrying triglycerides in the bloodstream?

  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
C Correct answer
Explanation

VLDL cholesterol transports triglycerides from the liver to other tissues in the body.

Multiple choice

Which of the following is NOT a type of lipid?

  1. Phospholipids

  2. Steroids

  3. Carbohydrates

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

Carbohydrates are not lipids. Lipids are a diverse group of organic compounds that include fats, oils, waxes, and phospholipids.

Multiple choice

Which type of lipid is commonly found in animal cell membranes?

  1. Phospholipids

  2. Steroids

  3. Triglycerides

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

Phospholipids are the major lipids found in animal cell membranes. They consist of a glycerol backbone, two fatty acid chains, and a phosphate group.

Multiple choice

Which of the following is a type of steroid lipid?

  1. Testosterone

  2. Estrogen

  3. Progesterone

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

Testosterone, estrogen, and progesterone are all types of steroid lipids. They are involved in various physiological processes, including reproduction, growth, and development.

Multiple choice

Which type of lipid is commonly found in plant cell walls?

  1. Phospholipids

  2. Steroids

  3. Triglycerides

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

Waxes are a type of lipid commonly found in plant cell walls. They provide a protective coating that helps prevent water loss and infection.

Multiple choice

Which of the following is an example of a phospholipid?

  1. Cholesterol

  2. Phosphatidylcholine

  3. Triglyceride

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

Phosphatidylcholine is an example of a phospholipid. It is a major component of cell membranes and plays a crucial role in maintaining membrane structure and function.

Multiple choice

Which type of lipid is commonly found in nerve cell membranes?

  1. Phospholipids

  2. Steroids

  3. Triglycerides

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

Phospholipids are the major lipids found in nerve cell membranes. They contribute to the electrical properties of nerve cells and play a role in nerve impulse transmission.