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 evs food components simple test for nutrients test for nutrients energy from different food components

Dietary fibers are composed of

  1. Cellulose

  2. Amylase

  3. Proteins

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

  • Fiber is the indigestible part of plant foods that travels through the digestive system and absorbs the water along the way.
  • It is also known as roughage.
  • Dietary fiber contains non-starch polysaccharides such as cellulose, dextrins, inulin, lignin, beta-glucans, and waxes. 
So, the correct answer is 'Cellulose'.

Multiple choice evs food components simple test for nutrients test for nutrients energy from different food components

Which ones function as regulators?

  1. Carbohydrates

  2. Lipids

  3. Proteins

  4. Vitamins and minerals
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vitamins and minerals function as regulators in growth and development process in living being. They also act as catalyst for various processes. Vitamin D acts as regulator in mineral metabolism. Some forms of vitamin A acts as regulator in growth and differentiation process. Minerals are part of enzymes that are part of many physiological processes.

Thus, the correct answer is option D.

Multiple choice chemistry chemistry in daily life food spoilage and food preservation methods of preserving food chemicals in food

Which of the following is a food antioxidant?

  1. Butylated hydroxytoluene (BHT)

  2. Butylated hydroxyanisole (BHA)

  3. Saccharin

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Butylated hydroxytoluene is  an organic compound primarily used as an antioxidant food additive.

Butylated hydroxyanisole (BHA) is an antioxidant consisting of a mixture of two isomeric organic compounds, 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole.

Saccharin is an artificial sweetener.

Option D is correct.
Multiple choice botany fibre to fabric: plant fibre classification of fibres fibres history of fabric

Animal fibers generally comprise of:

  1. collagen.

  2. keratin.
  3. both $A$ and $B$.

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

Animal fibers are natural fibers that consist largely of particular proteins. These proteins include collagen, keratin and fibroin.

examples include silk, sinew, wool, catgut, angora, mohair and alpaca.
The animal fibers used most commonly both in the manufacturing world as well as by the hand spinners are wool from domestic sheep and silk.

Multiple choice biology animals in daily life introduction to reproduction poultry farming food from animals

The yolk of avian eggs contain

  1. Albumin

  2. Provitellin

  3. Vitellin

  4. Lecithin

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Eggs are an important and well-balanced source of essential nutrients. Bird eggs consist of a protective eggshell, albumen (egg white), and vitellus (egg yolk). Yolk of egg consists of 50% of water, 9% lecithin, 16% other proteins which includes albumin, provitellin and vitellin and 23% fats, 0.3% carbohydrates and 1.7% minerals. 

Therefore, the correct answer is option E.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Yolk is composed of

  1. Carbohydrate

  2. Protein

  3. Phospholipid

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

The yolk is a part of an egg, that feeds the developing embryo in animals. It is composed of carbohydrates (3.5%), protein (16%) and fats (phospholipids 26.5%) of total yolk. The main fatty acids present in the yolk is oleic acid, linoleic acid, palmitic acid etc. 

Phosvitins and Lipovitellins are the major proteins present in the yolk. Apart from that yolk is also composed of vitamins - A, D, E, and K. 
So, the correct answer is option D.

Multiple choice evs food and health effect on general health diseases caused by changes in lifestyle diet, drugs and disease

Which of the following is also known as roughage?

  1. Fibres

  2. Carbohydrates

  3. Fats

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

Roughage is basically edible fiber. It has the capacity to resist the enzymes of human digestive system. It helps in proper elimination of waste products. examples are whole grains like oats and vegetables like carrot and cucumber. So, the correct option is 'Fibres'.

Multiple choice evs food and health effect on general health diseases caused by changes in lifestyle diet, drugs and disease

Which of the following concerning the major dietary constituents is true?  

  1. The body cannot store glucose.

  2. All essential amino acids are found in meat.

  3. Plant oils mainly consist of saturated fats.

  4. Both B and C.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When the body does not require glucose, it is stored in the form of glycogen in the liver and skeletal muscles. If the glycogen reservoirs are full, glucose is converted to fat and stored in the form of fats in various parts of the body as adipose cells. 

A complete protein (or whole protein) is a source of protein that contains an adequate proportion of all nine of the essential amino acids necessary for the dietary needs. Generally, proteins derived from animal foods meats, fish, poultry, milk, eggs are complete. Saturated fat is mainly found in animal foods, but a few plant foods are also high in saturated fats, such as coconut, coconut oil, palm oil, and palm kernel oil.
Therefore, the correct answer is option D.

Multiple choice biology animal tissues, morphology and anatomy of cockroach types of neuron nervous tissue neural tissues

Myelin sheath has layers of fat and protein

  1. Upto 100

  2. 10-20

  3. Two each

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

  • Myelin is an insulating layer or sheath that forms around nerves, including those in the brain and spinal cord.
  •  It is made up of protein and fatty substances. 
  • This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.
  •  If myelin is damaged, these impulses slow down. Hence, the Myelin sheath has layers of fat and protein up to 100.
So, the correct answer is 'up to 100'.

Multiple choice chemistry petrochemicals and polymers food spoilage and food preservation methods of preserving food chemicals in food

Modern oil-based paints contain oils that can dry to form strong, adhesive films by cross-linking of fatty acid chains. Some of these drying oils' are mentioned here. Can you pick the false one?

  1. Linseed oil

  2. Turpentine oil

  3. Soyabean

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

Drying oils are prone to hardening upon exposure to air, due to free radical base polymerization, thus forming a flexible, transparent and waterproof film. This property is exhibited by linseed, turpentine and soybean oils.