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 biomolecule is responsible for energy storage and insulation?

  1. lipids

  2. carbohydrates

  3. proteins

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

Lipids are primarily used by organisms for long-term energy storage and thermal insulation. Carbohydrates are used for short-term energy, while proteins and nucleic acids have different primary roles.

Multiple choice

What are the two monomers for lipids?

  1. Glycerol and glucose

  2. Glucose and fructose

  3. Fatty acids and glycerol

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

Most lipids, specifically triglycerides, are formed from one glycerol molecule and three fatty acid chains. The other options list sugars or incorrect combinations.

Multiple choice

one example of a product that is make of lipids

  1. wax

  2. bread

  3. cake

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

Waxes are complex lipids that provide waterproof coatings. They are found on plant leaves, animal fur, and in products like beeswax and earwax.

Multiple choice

cell membranes are made primarily of 

  1. lipids

  2. carbohydrates

  3. protein

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

Cell membranes are primarily composed of a phospholipid bilayer. Phospholipids are a major class of lipids.

Multiple choice carbohydrates - definition and classification introduction to carbohydrates biomolecules chemistry

In plant glycolipids, the sugar is normally.

  1. oil

  2. wax

  3. glycolipid

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

Glycolipids yeild fatty acids, glycerol and carbohydrates on hydrolysis. Monogalactosyldiglycerides are glycolipids which are commonly found in plant leaves and algae. They contain a high proportion of poly unsaturated fatty acids and appear to play a role in photosynthesis.

Multiple choice

Bile chemically digests fats.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bile emulsifies fats, which increases their surface area for lipase enzymes to work, but it does not chemically digest fats itself. Chemical digestion is performed by enzymes like pancreatic lipase.

Multiple choice

Which of these is absorbed by lacteals?

  1. micelles

  2. chylomicrons

  3. emulsification droplets
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chylomicrons are large lipoprotein particles formed in enterocytes that are too large to enter blood capillaries, so they are absorbed into lacteals (lymphatic vessels).

Multiple choice

Fats are absorbed into lacteals as

  1. emulsification droplets

  2. micelles

  3. chylomicrons

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

After fats are broken down and processed by enterocytes, they are reassembled into triglycerides and packaged with proteins and phospholipids to form chylomicrons. These chylomicrons are too large to enter blood capillaries and are instead absorbed into the lacteals.

Multiple choice

Fats are absorbed into circulation via

  1. blood capillaries

  2. lacteals
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Due to their large size, chylomicrons cannot pass through the basement membrane of blood capillaries. They enter the lymphatic capillaries, known as lacteals, which have larger pores.

Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Spherosomes take part in the synthesis of?

  1. Fat

  2. Carbohydrate

  3. Protein

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Spherosomes or oleosomes can be defined as small cellular organelles found in plant cells that are enclosed by a single membrane.
It is mainly responsible for the storage and synthesis of lipid.
The lipid content in spherosomes is 98% and proteins content is only 2 %.
They are obtained from the endoplasmic reticulum and are surrounded by a phospholipid monolayer.
So, the correct answer is 'Synthesis of fat'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Glyoxysomes are connected with metabolism of

  1. Fats

  2. Proteins

  3. Carbohydrates

  4. All the above.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Glyoxysomes are a type of peroxisomes found in plants and few filamentous fungi.
  • They are particularly found in fat storage tissues of germinating seeds (peanuts, soybeans etc.) in plants.
  •  They contain enzymes (citrate synthase, isocitrate lyase and malate synthase etc.) which are responsible for beta-oxidation of fatty acids,
  • It helps in fatty acid oxidation, glyoxylate cycle and gluconeogenesis.
  • So, the correct answer is 'Fats'.