Tag: bio-chemistry

Questions Related to bio-chemistry

State whether the following statements are true or false .
A metabolic pathway is a sequence of chemical reactions in which each step is controlled by its own specific enzymes.

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Enzymes are organic catalysts which aid in facilitating chemical reactions in the body. Each metabolic pathway consists of a series of biochemical reactions that are connected by their intermediates: the products of one reaction are the substrates for subsequent reactions, and so on. Any metabolic pathway inside our body (for example glycolysis) requires several enzymes working in a sequential manner. 

So, the correct option is 'True'.

Which of the following is not metabolised in human body and therefore, used in determining glomerular filtration rate?

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Insulin

  2. Inulin

  3. Cellulose xanthate

  4. Toxic ketones

Show answer
Correct Option: B
Explanation:

Inulin is an indicator of GFR because, it is neither reabsorbed into the blood after filtration nor secreted through peritubular capillaries, amount of inulin cleared through the urine is indicative of the amount of plasma filtered by body's glomeruli.

So, the correct option is 'Inulin'.

How many features listed below are exhibited by flatworms (A) and bacteria (B)?


(i) Growth by increases in mass only
(ii) Regeneration
(iii) Self-consciousness
(iv) Anabolism and catabolism
(v) Binary fission

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. A - (i,ii,iii,iv) B- (i, iii, iv)

  2. A - (ii,iv) B- (iv, v)

  3. A - (ii,iii,iv) B- (i, iv, v)

  4. A - (i,ii) B- (iii, iv, v)

Show answer
Correct Option: B

It is much easier for a small animal to run uphill than for a large animal, because - ?

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. small animals have lower $O _2$ requirement

  2. the efficiency of muscles in larger animal is less than in smaller animal

  3. it's easier to carry a small body weight

  4. smaller animals have higher metabolic rate

Show answer
Correct Option: D
Explanation:
It has been observed that the metabolic rate of an organism is inversely proportional to its body weight, that is smaller animals have a higher metabolic rate. This higher metabolic rate allows them to have higher energy and are quicker in climbing heights as compared to larger animals.

So, the correct answer  is 'smaller animals have higher metabolic rate'.

Choose the correct answers from the alternatives given .
All the biochemical pathways in a cell constitute

bio-chemistry organization of life concept of metabolism metabolism in animals metabolism

  1. Coupling reactions

  2. Endergonic reactions only

  3. Exergonic reactions only

  4. Metabolism

Show answer
Correct Option: D
Explanation:

There are various biochemical reactions taking inside a cell. Some of these reactions may result in absorption of energy (called as endergonic reactions) or release of energy (called as exergonic reactions). Often both these types of reactions are coupled, to get the energy to those endergonic reactions, they are paired up with energy-releasing exergonic reactions (known as coupling reactions). Although, there are a wide variety of reactions taking place inside the body apart from these reactions. Metabolism is a term that is used to describe all these biochemical reactions involved in maintaining the living state of the cells and the organism. 

So, the correct option is 'Metabolism'.


Which tissue is responsible for providing insulation to the body?

bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

  1. Epithelial tissue

  2. Adipose tissue

  3. Fibrous connective tissue

  4. Nervous tissue

  5. Muscle tissue

Show answer
Correct Option: B
Explanation:

Adipose tissue, or fat, is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body.

The greatest amount of energy per gram is produced by

bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

  1. Sugar

  2. Starch

  3. Fat

  4. Proteins

  5. Vitamins

Show answer
Correct Option: C
Explanation:
Our food contains three main constituents: carbohydrates, fats and proteins. The amount of energy released when one gram of any of these food elements is burned is known as calorific value. Thus calorific value of food indicates as to how much is the energy value of food which the human body can gain through metabolism. It is usually given in kcal/gm. Fats form the most concentrated source of energy in our diet. 1 gram of fat yields 9.5 kcal of energy which is the highest among the food components. 1 gram of carbohydrates and proteins yield almost similar amount of energy which is equal to 4 kcal.
Thus, the correct answer is option C.

Which is used for staining lipids?

bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

  1. Rhodamine

  2. Iodine

  3. Ethidium bromide

  4. Sudan Red

Show answer
Correct Option: D
Explanation:

 Lipids are the compound formed by alcohol and fatty acids ester linkage. They are characterized by solubility in the organic solvent. Sudan Red dye is used to stain lipids. It is water insoluble but dissolves with fats. Therefore, dye accumulates in the globules within the cells. Thus, the correct option is  D.

Study the given statement and select the correct answer  

bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

  1. Lipids are micromolecules but obtained under-macromolecular fraction due to their insoluble nature in aquous medium of a cell.

  2. water is the most aboundant chemical in living organism

  3. First respiratory substrate = Lipid

  4. DIhydroxy acetone occur in d and I form.

Show answer
Correct Option: A

Identify the statement which is incorrect about absorption of lipids.

bio-chemistry lipids functions of lipids biomolecules: chemical constituents of living cells biochemistry

  1. The lipids are absorbed in laymp capillaries present with the villi

  2. From the micelles ,fatty acids and glycerol are absorbed into the intestinal cells by active transport

  3. Micelles are formed with the help of bile salts and phospholipids in intestinal lumen

  4. The lacteals after absorption of lipids contains chyle

Show answer
Correct Option: A