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Economic Botany (GATE - XL)

Description: Economic botany
Number of Questions: 15
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Tags: Economic botany A general account of economically and medicinally important plants- cereals pulses plants yielding fibers timber sugar beverages oils rubber pigments dyes gums drugs and narcotics. Economic importance of algae fungi lichen and bacteria GATE CSIR NET Life Sciences Botany Dyes Economic Botany Drugs and Narcotics Plants Yielding Fibers Lichen and Bacteria Economic Importance of Algae
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Which of the following is used as an anti-hypertensive drug?

  1. Alkannin

  2. Shikonin

  3. Vinblastine

  4. Ajmalicine

  5. Glycyrrhizin

Show answer
Correct Option: D
Explanation:

Ajmalicine, an anti-hypertensive drug used in the treatment of high blood pressure, is obtained from the plant Cantharanthus roseus.

Which of the following plant products is obtained from Commiphora mukul?

  1. Alkannin

  2. Guggulsterone

  3. Atropine

  4. Ajmalicine

  5. Glycyrrhizin

Show answer
Correct Option: B
Explanation:

Guggulsterone is a plant steroid found in the resin of the guggul plant.

Match the following:

   
Natural colorant Source Plant part
P. Annatto 1. Curcuma longa i. Seed
Q. Curcumin 2. Rubia tinctorum ii. Leaf
R. Henna 3. Bixa Orellana iii. Root
S. Alizarin 4. Lawsonia inermis iv. Rhizome

  1. P - 3 - i, Q - 1 - iv, R - 4 - ii, S - 2 - iii

  2. P - 4 - ii, Q - 1 - iv, R - 4 - i, S - 2 - iii

  3. P - 3 - ii, Q - 4 - i, R - 2 - iii, S - 1 - iv

  4. P - 2 - ii, Q - 1 - iii, R - 4 - iv, S - 3 - i

  5. P - 2 - i, Q - 1 - iii, R - 4 - ii, S - 3 - iv

Show answer
Correct Option: A
Explanation:

Annatto is an orange-red condiment derived from the seeds of the achiote tree.

Which of the following matchings is incorrect?

  1. Gitalin, Cardiotonic, Digitalis purpurea

  2. Demecolcine, anti-tumour agent, Colchicum autumnale

  3. Caffeine, CNS stimulant, Camellia sinensis

  4. Bergenin, Antitussive, Ardisia japonica

  5. Kheltin, anti-hyerptensive, Ammi visaga

Show answer
Correct Option: E
Explanation:

Kheltin is a bronchodilator drug obtained from Ammi visaga.

Match the following:

 
Column I Column II
P. Saffron 1. Acacia catechu
Q. Gamboge 2. Rocella tinctoria
R. Litmus 3. Crocus sativus
S. Cutch 4. Garcinia sp.

  1. P - 1; Q - 2; R - 3; S - 4

  2. P - 2; Q - 4; R - 3; S - 1

  3. P - 3; Q - 4; R - 2; S - 1

  4. P - 3; Q - 2; R - 4; S - 1

  5. P - 4; Q - 2; R - 1; S - 3

Show answer
Correct Option: C
Explanation:

Gamboge is a partially transparent deep saffron to mustard yellow pigment.

Match the columns:

 
Column I Column II
P. Shikonin 1. Sweetener
Q. Vinblastine 2. Anti-cancer
R. Morphine 3. Narcotic analgesic
S. Glycyrrhizin 4. Dye

  1. P - 1; Q - 2; R - 3; S - 4

  2. P - 2; Q - 3; R - 4; S - 1

  3. P - 3; Q - 2; R - 4; S - 1

  4. P - 3; Q - 2; R - 1; S - 4

  5. P - 4; Q - 2; R - 3; S - 1

Show answer
Correct Option: E
Explanation:

Glycyrrhizin is the chief sweet-tasting constituent of Glycyrrhiza glabra root.

Which of the following plant products is used as cholinesterase inhibitor drug?

  1. Galanthamine

  2. Deserpidine

  3. Digitalin

  4. Ephedrine

  5. Glaucine

Show answer
Correct Option: A
Explanation:

Galanthamine is a cholinesterase inhibitor obtained from Lycoris squamigera.

Which of the following plants is a source of sweeteners?

  1. Rauvolfia serpentina

  2. Stevia rebaudiana

  3. Strychnos nux-vomica

  4. Colchicum autumnale

  5. Camptotheca acuminata

Show answer
Correct Option: B
Explanation:

Stevioside is a sweetener obtained from Stevia rebaudiana.

Which of the following is a set of bast fibres only?

  1. Cotton, Flax, Hemp, Jute

  2. Cotton, Hemp, Jute, Kenaf

  3. Flax, Hemp, Cotton, Kenaf

  4. Flax, Hemp, Jute, Kenaf

  5. Flax, Cotton, Jute, Kenaf

Show answer
Correct Option: D
Explanation:

Bast fibre is plant fibre collected from the phloem or bast surrounding the stem of certain dicotyledonous plants. 

Match the columns:

 
Column I Column II
P. Papain 1. Papaver somniferum
Q. Codeine 2. Carica papaya
R. Digoxin 3. Ananas comosus
S. Bromelain 4. Digitalis lanata

  1. P - 1; Q - 2; R - 3; S - 4

  2. P - 1; Q - 3; R - 2; S - 4

  3. P - 2; Q - 1; R - 3; S - 4

  4. P - 2; Q - 1; R - 4; S - 3

  5. P - 3; Q - 2; R - 4; S - 1

Show answer
Correct Option: D
Explanation:

Papain is a proteolytic enzyme obtained from unripe papaya fruit (Carica papaya).

Match the following columns:

 
Column I Column II
P. Ricin 1. Castor
Q. Gossypol 2. Wheat
R. Gliadin 3. Cotton
S. Zein 4. Maize

  1. P - 1, Q - 2, R - 3, S - 4

  2. P - 1, Q - 3, R - 2, S - 4

  3. P - 2, Q - 4, R - 3, S - 1

  4. P - 3, Q - 2, R - 1, S - 4

  5. P - 4, Q - 3, R - 2, S - 1

Show answer
Correct Option: B
Explanation:

Ricin is a highly toxic, naturally occurring lectin.

Which of the following is a pair of bacteria that change nitrites to nitrates?

  1. Rhizobium and Nitromonas

  2. Nitrosomanas and Nitrococcus

  3. Nitrobacter and Nitrocystis

  4. Nitrobacter and Nitrosomanas

  5. Rhizobium and Nitrobacter

Show answer
Correct Option: C
Explanation:

Nitrobacter and Nitrocystis change nitrites to nitrates.

Match the following:

 
Plant Protein
P. Wheat 1. Gliadin
Q. Pea 2. Legumin
R. Rapeseed 3. Napin

  1. P - 1; Q - 2; R - 3

  2. P - 1; Q - 3; R - 2

  3. P - 2; Q - 1; R - 3

  4. P - 2; Q - 3; R - 1

  5. P - 3; Q - 2; R - 1

Show answer
Correct Option: A
Explanation:

Napin is a seed storage protein found in rapeseed (Brassica napus).  Legumin is a seed storage protein found in beans, peas, lentils, vetches and other leguminous seeds.

Match the columns:

   
Compound Use Source plant
P. Danthron 1. Anti-parkinson i. Cinchona ledgeriana
Q. L-Dopa 2. Laxative ii. Cassia sp.
R. Morphine 3. Antimalarial iii. Mucuna sp.
S. Quinine 4. Analgesic iv. Papaver somniferum

  1. P - 1 - ii, Q - 2 - i, R - 4 - iv, S - 3 - iii

  2. P - 2 - ii, Q - 4 - iv, R - 1 - iii, S - 3 - i

  3. P - 2 - ii, Q - 1 - iii, R - 4 - iv, S - 3 - i

  4. P - 3 - i, Q - 1 - iv, R - 4 - ii, S - 2 - iii

  5. P - 3 - ii, Q - 4 - i, R - 2 - iii, S - 1 - iv

Show answer
Correct Option: C
Explanation:

Danthron is a laxative obtained from Cassia sp.

Match the columns.

 
Column I Column II
P. Bio-fertilisers 1. Nostoc, Spirulina
Q. Alginates producers 2. Gelidium, Graciliaria
R. Agar-Agar producers 3. Fucus, Laminaria
S. Fodder 4. Pelvitia, Ascophyllum

  1. P - 1; Q - 2; R - 3; S - 4

  2. P - 1; Q - 3; R - 2; S - 4

  3. P - 2; Q - 3; R - 4; S - 1

  4. P - 3; Q - 2; R - 4; S - 1

  5. P - 2; Q - 1; R - 3; S - 4

Show answer
Correct Option: B
Explanation:

Nostoc, Oscillatoria, Scytonema, Spirulina, etc. are used as fertilisers in rice fields.

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