Biology · 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 among the following is good cholesterol?

  1. VLDL

  2. HDL

  3. LDL

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

High-density lipoprotein (HDL) is known as good cholesterol because it helps remove other forms of cholesterol from the bloodstream, transporting it to the liver for excretion.

Multiple choice

Lipid containing proteins are important constituents of all biological membranes. They are known as:

  1. Glyco-proteins

  2. Lipo-proteins

  3. Nucleo-proteins

  4. Chromo-proteins

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lipo-proteins  have lipids bound to proteins. Lipo-proteins are important constituents of all biological membranes : plasma membrane, membranes of the endoplasmic reticulum, lysosome, Golgi complex, mitochondria, nuclear envelope and the chloroplasts. They also occur as lipovitellin, a storage product in egg yolk.

Multiple choice

Directions: The given conversation has the sentences mixed up. Re-order them correctly

(a) It is used by the body to build cell walls and essential hormones. (b) Cholesterol is carried through the blood by particles called lipoproteins. (c) But it is also found in the animal fats which one eats. (d) Cholesterol is produced by liver.

  1. D C B A

  2. D B C A

  3. D C A B

  4. C B A O
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option 1 presents the correct sequence of the sentences

Multiple choice

Main components of plasma membrane are ________ .

  1. proteins only

  2. lipids only

  3. both proteins and lipids

  4. carbohydrates

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The plasma membrane is primarily composed of a lipid bilayer embedded with various proteins, often described by the fluid mosaic model.

Multiple choice

Instantaneous source of energy is/are

  1. amino acids

  2. fats

  3. glucose

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

Glucose is a monosaccharide that enters glycolysis directly, making it the most readily available and instantaneous source of energy for cellular respiration.

Multiple choice

R.Q. of fatty substances is generally

  1. zero

  2. unity

  3. more than one

  4. less than one
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fatty substances are highly reduced and require more oxygen for complete oxidation relative to the CO2 produced, resulting in an RQ value less than 1 (typically around 0.7).

Multiple choice

What forms the largest part of most diets?

  1. Nucleic acid

  2. Proteins

  3. Carbohydrates

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

Carbohydrates are the primary source of energy and form the largest part of most human diets, providing the bulk of daily caloric intake.

Multiple choice

Coacervates are

  1. lipoproteins

  2. mixtures of ammonia, carbohydrates and water

  3. colloidal suspensions

  4. fatty acids and nitrogenous compounds
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Coacervates are colloidal suspensions.Oparin’s work with coacervates confirmed that enzymes fundamental for the biochemical reactions of metabolism functioned more efficiently when contained within membrane-bound spheres than when free in aqueous solutions.

Multiple choice

In ageing, there is

  1. decrease in cholesterol level

  2. increase in calcium content of arteries and cartilage

  3. decrease in calcium content of arteries and cartilage

  4. decrease in blood urea
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In ageing, there is increase in calcium content of arteries and cartilage.

Multiple choice

In gout ________ accumulates in the joints.

  1. Amino acids

  2. Uric acid

  3. Urea

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

Gout is a disorder in which humans start to accumulate, more than the usual amount of uric acid, caused by either the body manufacturing excess uric acid, or the kidneys not excreting enough of it, and since it's not water-soluble, it gets stored in the body, frequently in toe joints, causing pain and deformation of the joints involved, as well as, the formation of kidney stones.