Question 1

Concanavalin A is:

Accepted Answer

Concanavalin A is a secondary metabolite e.g is lectin, it has the property to agglutinates RBCs.

Question 2

What are gums made of? Is Fevicol different?

Accepted Answer

Gums are hetero-polysaccharides. They are made from two or more different types of derived monosaccharides. On the other hand, fevicol is polyvinyl alcohol (PVA) glue. It is not a polysaccharide.

Question 3

Primary metabolites play known roles in

Accepted Answer

Primary metabolities includes amino acids, sugars etc. They play a major role in physiological processes.

Question 4

Select the secondary metabolites from the list given belowI. alkaloidsII. flavonoidsIII. rubberIV. essential oilsV. antibioticsVI. coloured pigmentsVII. scentsVIII. gumsIX. spicesChoose the correct option

Accepted Answer

Secondary metabolites (SMs) are generally defined as small organic molecules produced by an organism that are not essential for their growth, development and reproduction. For example: alkaloids, rubber, essential oils and coloured pigments.

Question 5

Select the secondary metabolites from the list given belowI. alkaloidsII. flavonoidsIII. rubberIV. essential oilsV. antibioticsVI. coloured pigmentsVII. scentsVIII. gumsIX. spicesChoose the correct option

Accepted Answer

Thousands of compounds including flavonoids, rubber, essential oils, antibiotics, coloured pigments, scents, gums, spices. There are called secondary metabolites.

Question 6

Name the plant pigments present in the followingI. CarrotsII. Tomatoes

Accepted Answer

(i) Carrots – Carotene(ii) tomatoes – Lycopene

Question 7

Which of the following secondary metabolites are used as drugs?

Accepted Answer

Vinblastin and curcumin are secondary metabolites that are used as drugs.

Question 8

Assertion : Secondary metabolites of plants can be useful for human.Reason : Abrin and ricin are toxins.

Accepted Answer

Secondary metabolites are organic compounds produced by plants which are not directly involved in the normal growth, development or reproduction of the organism. Ricin and abrin are potent biological toxins that are derived from plant sources (castor beans and rosary peas respectively). More is known about ricin toxicity; however, abrin toxicity is similar in its mechanism of action. In the body, these toxins inhibit protein synthesis leading to cell death.

Question 9

Assertion: Secondary metabolites are produced in small quantities and their extraction from the plant is difficult and expensive.Reason: Secondary metabolites can be commercially produced by using tissue culture technique.

Accepted Answer

Secondary metabolites are biosynthetically derived from primary metabolites but more limited in distribution in plant kingdom being restricted to a particular taxonomic group and relatively difficult to extract. By culture media using tissue culture technique, secondary metabolites can be produced on a large scale.

Question 10

Tannins are

Accepted Answer

Excretory product of plants are by product of metabolism. Such as Resin, Tannins, Alkaloids, Glucoside etc.

Question 11

Assertion: Secondary metabolites are produced in small quantities and their extraction from the plant is difficult and expensive. Reason: Secondary metabolites can be commercially produced by using tissue culture technique.

Accepted Answer

Secondary metabolites are biosynthetically derived from primary metabolites but more limited in distribution in plant kingdom being restricted to a particular taxonomic group. By culture media using tissue culture technique, secondary metabolites can be produced on a large scale.

Question 12

Primary metabolites

Accepted Answer

Primary metabolites are present in all living tissues. These include amino acids, sugars (e.g. glucose, fructose) etc. They play a major role in different physiological processes of the body including growth, development and reproduction.

Question 13

Sugar and amino acids are secondary metabolites.

Accepted Answer

Sugar and amino acids are primary metabolites. Sugars are building blocks of starch, glycogen, etc., while amino acids are the building blocks of proteins.

Question 14

Secondary metabolites can be observed in

Accepted Answer

All of these

Question 15

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their

Accepted Answer

defence action

Question 16

Primary metabolites

Accepted Answer

Primary metabolites are present in all living tissues. These include amino acids, sugars (e.g. glucose, fructose) etc. They play a major role in different physiological processes of the body including growth, development and reproduction.

Question 17

Is rubber a primary metabolite or a secondary metabolite? Write four sentences about rubber.

Accepted Answer

Rubber (cis 1, 4-polyisopyrene) is a secondary metabolite. Secondary metabolites are chemicals produced by plants for which no role has been found yet in growth, photosynthess, reproduction or other primary functions.(i) Rubber is extracted from Havea brasiliensis (rubber tree).(ii) It is a byproduct of the lactiferous tissue of the vessels that are in the form of latex.(iii) It is the largest of the terpenoids because it contains over 400 isoprene units.(iv) It is elastic, water proof and a good electrical conductor.

Question 18

Primary metabolites play known roles in -

Accepted Answer

Primary metabolites include amino acids, sugars, etc. They play a major role in physiological processes.

Question 19

Which of the following secondary metabolites are used as drugs?

Accepted Answer

(b) Vinblastin is used as an anticancer drug, whereas curcumin is a component of turmeric and also used as drug.

Question 20

Sugar and amino acids are secondary metabolites.

Accepted Answer

Sugar and amino acids are primary metabolites. Sugars are building blocks of starch, glycogen, etc., while amino acids are the building blocks of proteins.

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