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 of the following is a type of lipid that is involved in the process of phagocytosis?

  1. Phospholipids

  2. Steroids

  3. Glycolipids

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

Sphingolipids are a class of lipids that are involved in a variety of cellular processes, including phagocytosis. Phagocytosis is the process by which cells engulf and internalize solid particles. Sphingolipids, particularly sphingomyelin, are found in the cell membrane and play a role in the formation of phagocytic cups, which are extensions of the cell membrane that surround and engulf the target particle.

Multiple choice

How can you tell if an oil or fat has gone rancid?

  1. It will have a sour or bitter taste

  2. It will have a dark color

  3. It will have a strong odor

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

Rancidity is a process that occurs when oils and fats are exposed to light and air, and it can cause them to taste bad and produce harmful compounds. Rancid oils and fats will have a sour or bitter taste, a dark color, and a strong odor.

Multiple choice

What are some common signs that an oil or fat has gone bad?

  1. It has a sour or bitter taste

  2. It has a dark color

  3. It has a strong odor

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

A sour or bitter taste, a dark color, and a strong odor are all common signs that an oil or fat has gone bad.

Multiple choice

Which type of fat is considered healthy?

  1. Saturated fat

  2. Trans fat

  3. Unsaturated fat

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

Unsaturated fats, such as monounsaturated and polyunsaturated fats, are considered healthy fats.

Multiple choice

Which of the following is NOT a type of biological molecule?

  1. Carbohydrates

  2. Lipids

  3. Proteins

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

Minerals are inorganic substances and are not considered biological molecules.

Multiple choice

Which type of lipid is commonly found in 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 main components of cell membranes due to their amphipathic nature.

Multiple choice

What is the primary source of energy for the body?

  1. Carbohydrates

  2. Fats

  3. Proteins

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

Carbohydrates are the primary source of energy for the body, providing fuel for various bodily functions.

Multiple choice

Which of the following is a type of lipid that is stored in adipose tissue?

  1. Phospholipids

  2. Steroids

  3. Triglycerides

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

Triglycerides are the main form of fat stored in adipose tissue. They are composed of three fatty acids attached to a glycerol molecule.

Multiple choice

Which of the following is a type of fatty acid that is unsaturated?

  1. Palmitic acid

  2. Stearic acid

  3. Oleic acid

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

Oleic acid is a type of fatty acid that is unsaturated, meaning that it has one or more double bonds between the carbon atoms.

Multiple choice

Which of the following is a type of fatty acid that is saturated?

  1. Palmitic acid

  2. Stearic acid

  3. Oleic acid

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

Palmitic acid is a type of fatty acid that is saturated, meaning that it has no double bonds between the carbon atoms.

Multiple choice

What is the name of the molecule that is formed when a fatty acid is esterified with glycerol?

  1. Phospholipid

  2. Triglyceride

  3. Steroid

  4. Fatty acid synthase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A triglyceride is a molecule that is formed when a fatty acid is esterified with glycerol. Triglycerides are the main form of fat stored in adipose tissue.

Multiple choice

Which of the following is a type of lipid that is found in cell membranes?

  1. Phospholipids

  2. Steroids

  3. Triglycerides

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

Phospholipids are a type of lipid that is found in cell membranes. They are composed of a glycerol molecule, two fatty acids, and a phosphate group.

Multiple choice

What is the name of the molecule that is formed when a fatty acid is esterified with a phosphate group?

  1. Phospholipid

  2. Steroid

  3. Triglyceride

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

A phospholipid is a molecule that is formed when a fatty acid is esterified with a phosphate group. Phospholipids are a major component of cell membranes.

Multiple choice

Which of the following is a type of lipid that is found in hormones?

  1. Phospholipids

  2. Steroids

  3. Triglycerides

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

Steroids are a type of lipid that is found in hormones. They are composed of four fused carbon rings.

Multiple choice

What is the name of the molecule that is formed when a fatty acid is esterified with a cholesterol molecule?

  1. Phospholipid

  2. Steroid

  3. Triglyceride

  4. Fatty acid synthase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A steroid is a molecule that is formed when a fatty acid is esterified with a cholesterol molecule. Steroids are a major component of cell membranes and are also involved in hormone production.