Biology · 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

Which of the following compound(s) do not belong to lipids?

  1. Fats

  2. Phospholipids

  3. Carbohydrates

  4. Amino acids

  5. Both fats and carbohydrates
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbohydrates do not belong to lipids. They belong to a large group of organic compounds occurring in foods and living tissues and include sugars, starch, and cellulose.

Multiple choice

_______ store fat in their vacuoles.

  1. Mast cells

  2. Fibroblasts

  3. Adipose cells

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

Adipose cells (adipocytes) are specialized for storing fat (triglycerides) in their large vacuoles. They serve as energy reserves and provide insulation. Mast cells mediate immune responses, fibroblasts produce collagen, and macrophages engulf pathogens.

Multiple choice

Energy is stored in the liver and muscles as

  1. glycogen

  2. starch

  3. fat

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

Animals store glucose as glycogen in liver and muscle tissue for short-term energy needs. The liver maintains blood glucose levels for the whole body, while muscles keep glycogen for their own use during exercise. Plants store energy as starch, and while fat is also an energy reserve, glycogen is the primary storage form in liver and muscles.

Multiple choice

Flip flop movement is influenced by the enzyme flippase which causes the movement of ___________ to move from one side of the bilayer to the other.

  1. lipids

  2. lipoproteins

  3. oligosaccharides

  4. intrinsic proteins

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

Flippases are a family of transmembrane lipid transporter enzymes located in the membrane responsible for aiding the movement of phospholipid molecules between the two leaflets that compose a cell's membrane.

Multiple choice

Which of the following happens during saponification?

  1. Hydrolysis of fats by lipase enzyme

  2. Hydrolysis of fats by alkali

  3. Reaction of unsaturated fatty acids with hydrogen

  4. Oxidation of unsaturated fatty acids

  5. Emulsification of fat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hydrolysis of fats by alkali is called saponification and it results in the formation of soaps.

Multiple choice

Which of the following is/are essential fatty acid(s)?

  1. Nemotinic acid

  2. Linolenic and linoleic acids

  3. Isopalmitic acid

  4. Stearic acid

  5. Oleic acid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

These fatty acids cannot by synthesised by the body. As they have to be provided in the diet, they are essential fatty acids.

Multiple choice

What is the function of glycine?

  1. It is required for the formation of nicotinamide.

  2. It is required for the formation of indole-3 acetic acid in plants.

  3. It is involved in the formation of haem, a portion of haemoglobin.

  4. It is converted into hormones.

  5. It is involved in the formation of silk proteins.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glycine is required for the formation of haem portion of haemoglobin.