Medicinal Plants and Their Drugs Practice Quiz (27 questions)

1. Which medicinal role is associated with the small, hard, dark-brown globular part of the colchicaceous colchicum plant?

A. It is used to reduce oedema and as a source of aescin.

B. It is used to lower blood sugar and as a stimulant.

C. It is used as a laxative and as a source of coumarin.

D. It is used against gout and as a source of colchicine.

Answer: (D)

Explanation

Colchicum drug is used as an antigout agent and provides colchicine. Horse chestnut is the related-looking seed associated with reducing oedema and yielding aescin.

2. A small, quadrangular, grey-yellow seed with grooves is identified as fenugreek; which set of effects is associated with it?

A. Anticoagulant effects and coumarin production.

B. Anti-inflammatory, laxative, and emollient effects.

C. Anabolic, stimulant, and hypoglycemic effects.

D. Anti-inflammatory and anti-oedematous effects with aescin production.

Answer: (C)

Explanation

Fenugreek is described as anabolic, stimulant, and hypoglycemic. Flax shares some medicinal properties, but its listed actions are anti-inflammatory, laxative, and emollient.

3. Which seed description and medicinal properties identify cultivated flax?

A. Large, black, elongated flattened seeds; anticoagulant and a source of coumarin.

B. Smooth, shiny, brown, flattened almond-shaped seeds; anti-inflammatory, laxative, and emollient.

C. Small, quadrangular, grey-yellow grooved seeds; anabolic, stimulant, and hypoglycemic.

D. Large, dark-brown seeds with a whitish hilum; anti-oedematous and a source of aescin.

Answer: (B)

Explanation

Cultivated flax has smooth, shiny, brown, flattened almond-shaped seeds and the listed anti-inflammatory, laxative, and emollient effects. Fenugreek is a plausible mix-up because it is also a medicinal seed, but its appearance and actions differ.

4. Which feature best distinguishes Chinese star anise as a medicinal drug?

A. A hard, rough, reddish-brown dry fruit that opens into star-shaped follicles with oval brown seeds.

B. A black achene mottled yellow with a slightly wrinkled surface.

C. A brown, hairy dry diakene whose two mericarps remain joined to a long pedicel.

D. A grey-reddish ovoid drug with numerous grooves and a wrinkled surface.

Answer: (A)

Explanation

Chinese star anise is a dehiscent dry fruit composed of star-shaped follicles containing oval brown seeds. Green anise is also a dry fruit, but it is a hairy diakene with mericarps attached to a pedicel.

5. A brown, ovoid dry diakene has short rough hairs, and its mericarps are joined to a long pedicel; which drug is it?

A. Chinese star anise, used as a stomachic, carminative, and condiment.

B. Milk thistle, used as a hepatoprotective, cholagogue, and choleretic.

C. Green anise, used as an antispasmodic, galactagogue, and carminative.

D. Nutmeg, used as a carminative and stimulant.

Answer: (C)

Explanation

The hairy brown diakene with mericarps joined to a long pedicel identifies green anise, which has the stated medicinal uses. Chinese star anise is a tempting alternative because it is also carminative and used as a condiment, but its fruit consists of star-shaped follicles.

6. Which combination of appearance and action characterizes khella?

A. Curved bark fragments with transverse white patches; laxative and purgative.

B. Small grey-brown, glabrous ovoid diakenes with separated mericarps; bronchodilator, spasmolytic, and coronary vasodilator.

C. Light brown-green hairy diakenes with a short pedicel; galactagogue and emmenagogue.

D. Small elongated, slightly curved brown diakenes with a long pedicel; stimulant, anthelmintic, and carminative.

Answer: (B)

Explanation

Khella has small, grey-brown, glabrous ovoid diakenes whose mericarps are separated, and it acts as a bronchodilator, spasmolytic, and coronary vasodilator. Caraway is another diakene drug, but it is elongated and curved and has a long pedicel.

7. A cinnamon bark sample is dark reddish-brown, especially on the inside, and has a poorly scraped outer face; which type does it indicate?

A. Khella, which has grey-brown fruits with separated mericarps.

B. Ceylon cinnamon, which has a smooth outer face and short projecting white fibers.

C. Chinese cinnamon, which lacks lichens and lenticels.

D. Cascara, which has a smooth brown outer surface with transverse white patches.

Answer: (C)

Explanation

Chinese cinnamon is darker reddish-brown, especially inside, and has a poorly scraped outer face without lichens or lenticels. Ceylon cinnamon is the close alternative, but it is lighter and has a smooth outer face with short projecting white fibers.

8. Which description identifies cascara bark and its principal medicinal action?

A. Curved fragments with a smooth brown outer surface bearing transverse white patches and a brown-yellow striated inner surface; laxative and purgative.

B. Grey-brown ovoid fruits with separated mericarps; laxative and purgative.

C. Thin light-brown fragments with a smooth outer face and short projecting white fibers; bronchodilator and spasmolytic.

D. Dark reddish-brown fragments with a poorly scraped outer face and no lichens or lenticels; carminative and eupeptic.

Answer: (A)

Explanation

Cascara has curved bark fragments with transverse white patches outside and a brown-yellow striated inner surface, and it is laxative and purgative. The bark fragments with a smooth face and projecting white fibers instead describe Ceylon cinnamon.

9. Which description best identifies liquorice root and one characteristic feature of its rhizome?

A. A dark cylindrical stick with a yellow interior; its rhizome has globular floats

B. A dark cylindrical stick with a yellow interior; its rhizome has central pith

C. A reddish-brown bark fragment with a yellow interior; its rhizome has central pith

D. A yellow-green striated stem; its rhizome has central pith

Answer: (B)

Explanation

Liquorice root is a dark cylindrical stick with a yellow interior, and its rhizome contains central pith. The reddish-brown bark description belongs to red cinchona, while globular floats are characteristic of Fucus.

10. Which medicinal material is recognized by thick, hard, reddish-brown bark fragments with a suber-bearing, transversely striated outer surface?

A. Ginseng, used as an antimalarial and bitter tonic

B. Liquorice, used as an antimalarial and bitter tonic

C. Red cinchona, used as a nasal decongestant and bitter tonic

D. Red cinchona, used as an antimalarial and bitter tonic

Answer: (D)

Explanation

Red cinchona has the described bark, including its transversely striated, suber-bearing outer surface, and is antimalarial and a bitter tonic. The nasal decongestant action belongs to Chinese ephedra, not red cinchona.

11. A rhizome sample has light-brown, knotted, striated fragments that are very fibrous when broken, with thinner roots. Which plant does it identify?

A. Official lavender

B. Hawthorn

C. Turmeric

D. Butcher’s broom

Answer: (D)

Explanation

Butcher’s broom rhizome consists of light-brown, knotted, striated fragments that are highly fibrous when broken and have thinner roots. Turmeric is instead characterized by hard fragments with an orange-yellow break.

12. Which combination of floral features identifies hawthorn flowering tops?

A. Five blue-violet petals with three free epicalyx segments

B. Pink flowers in biparous cymes with a gamosepalous calyx

C. Small violet flowers with a grey-blue veined tubular calyx

D. Corymbs with five short triangular sepals and five white petals

Answer: (D)

Explanation

Hawthorn flowering tops form corymbs with five short triangular sepals and five white petals. The small violet flowers and tubular calyx describe official lavender.

13. A chamomile sample has a large flower head, and its medicinal profile includes cholagogue and emmenagogue effects. Which chamomile is it?

A. Mallow

B. Roman chamomile

C. Centaury

D. German chamomile

Answer: (B)

Explanation

Roman chamomile has a large flower head and is cholagogue and emmenagogue, among other actions. German chamomile has a small flower head and is instead described as choleretic and ulcer-protective.

14. Which floral structure is characteristic of mallow flowers?

A. A grey-blue veined tubular calyx and a weakly bilabiate corolla

B. A gamosepalous calyx and a pink corolla

C. Five short triangular sepals and five white petals

D. Three free oblong epicalyx segments and five blue-violet petals

Answer: (D)

Explanation

Mallow flowers have three free oblong epicalyx segments and a corolla of five blue-violet petals. The pink corolla with a gamosepalous calyx is characteristic of centaury.

15. Which combination best describes the medicinal properties of red vine leaves?

A. Anti-inflammatory, antiallergic, capillary-protective, and diuretic

B. Antisudoral, hypoglycemic, choleretic, and used as a condiment

C. Stomachic, antispasmodic, mildly sedative, and febrifuge

D. Anti-inflammatory, astringent, angioprotective through vitamin P, and haemostatic

Answer: (D)

Explanation

Red vine leaves are described as anti-inflammatory and astringent, with angioprotective action through vitamin P and haemostatic action. The antiallergic and diuretic profile instead characterizes ginkgo.

16. A medicinal leaf sample is identified as official sage. Which additional feature is consistent with this identification?

A. Its leaves are brittle, palmately lobed, and red-purple, and the plant is haemostatic.

B. Its leaves have wavy, entire margins rolled upward, and the plant is mildly sedative.

C. Its leaves are pale-green and fan-shaped, and the plant has capillary-protective effects.

D. Its leaves can be thick, toothed, rough, and grey-green, and the plant is used as a condiment.

Answer: (D)

Explanation

Official sage can have thick, toothed, rough, reticulate grey-green blades and is also used as a condiment. The brittle, red-purple, palmately lobed leaves are characteristic of red vine.

17. Which leaf description and medicinal profile identify ginkgo?

A. Large, flattened green leaves with a prominent midrib; cardiotonic and antifungal effects

B. Pale-green, fan-shaped bilobed leaves that turn yellow; anti-inflammatory and capillary-protective effects

C. Brittle, red-purple, palmately lobed leaves; astringent and haemostatic effects

D. Pale yellow-green leaves with wavy margins; stomachic and febrifuge effects

Answer: (B)

Explanation

Ginkgo has pale-green, fan-shaped bilobed leaves that turn yellow and is described as anti-inflammatory and capillary-protective. The cardiotonic and antifungal profile belongs to oleander.

18. Atropine in belladonna produces which pharmacological action?

A. Diuretic action

B. Cardiotonic action

C. Central nervous system sedative action

D. Parasympatholytic action

Answer: (D)

Explanation

Belladonna acts as a parasympatholytic through its atropine. Cardiotonic action is associated with purple foxglove, not belladonna.

19. A leaf drug has oval, grey-green blades with a prominent upper surface and a very hairy, whitish-green lower surface; which action is associated with it?

A. Analgesic action

B. Cardiotonic action

C. Acaricidal action

D. Parasympatholytic action

Answer: (B)

Explanation

These leaf features identify purple foxglove, which is cardiotonic and diuretic. The parasympatholytic action is associated with belladonna, henbane, and datura rather than purple foxglove.

20. A drug consists of leaflets, while the plant bears brownish pods; what medicinal effect is associated with this drug?

A. Laxative and purgative effects

B. Purgative and diuretic effects

C. Emmenagogue and vulnerary effects

D. Diuretic and antirheumatic effects

Answer: (A)

Explanation

Senna drug consists of leaflets, its fruits are brownish pods, and it is laxative and purgative. Diuretic and antirheumatic effects are associated with common ash.

21. Which combination identifies common ash among medicinal plants with leaf-based drugs?

A. Compound leaves, flattened samara fruits, and diuretic, laxative, and antirheumatic effects

B. Spatulate leaves with leathery grey-green blades and purgative and diuretic effects

C. Leaflets, brownish pods, and laxative and purgative effects

D. Small, fragile leaves that redden during storage and have dyeing and vulnerary uses

Answer: (A)

Explanation

Common ash has compound leaves and flattened samara fruits, and its medicinal effects include diuretic, laxative, and antirheumatic actions. Senna also has laxative effects, but its drug consists of leaflets and its fruits are brownish pods.

22. Which parts of rosemary are used as the drug, and which effect is associated with it?

A. Leaves and flowering tops; it has hepatoprotective activity.

B. Flowers alone; it has a sedative cardiac effect.

C. Roots and seeds; it has hypoglycemic activity.

D. Bark and fruits; it has expectorant activity.

Answer: (A)

Explanation

Rosemary drug consists of its leaves and flowering tops and is among other actions hepatoprotective. Hypoglycemic activity is associated with eucalyptus, not rosemary.

23. A preparation of Eucalyptus globulus is selected for its respiratory antiseptic and balsamic actions; which additional effect is also attributed to it?

A. It has cholagogue activity.

B. It has hypoglycemic activity.

C. It has cicatrizant activity.

D. It has antispasmodic activity.

Answer: (B)

Explanation

Eucalyptus is described as a respiratory antiseptic and balsamic drug that also has hypoglycemic activity. Cholagogue and antispasmodic actions are associated with other plants in these topics.

24. How does the effect of Aloe ferox vary with dose?

A. It is purgative at low doses and antiseptic and cholagogue at high doses.

B. It is weakly cholagogue at low doses and laxative and purgative at high doses.

C. It is laxative at low doses and weakly cholagogue and purgative at high doses.

D. It is antiseptic at low doses and cicatrizant and antipruritic at high doses.

Answer: (B)

Explanation

Aloe has a weak cholagogue effect at low doses and becomes laxative and purgative at high doses. The reversed dose relationship is incorrect; it swaps the actions assigned to low and high doses.

25. Which description correctly identifies frankincense, also called olibanum?

A. A plant exudate occurring as rounded blond or reddish tears.

B. A thick, dark-brown liquid oleoresin obtained from a papilionoid plant.

C. A resin obtained by incising the trunk, occurring as irregular pale-yellow to yellow-reddish tears.

D. A dark-brown, greenish-reflecting mass formed from thickened leaf juice.

Answer: (C)

Explanation

Frankincense is a resin obtained by incising the trunk and appears as irregular globular or ovoid tears ranging from pale yellow to yellow-reddish. The thick, dark-brown liquid oleoresin describes Peru balsam instead.

26. What causes an oak gall to form?

A. A fungus infects a branch and deposits spores within the wood.

B. A gall wasp’s feeding removes bark and leaves a hollow in the trunk.

C. A gall wasp’s sting and egg-laying induce an outgrowth on the oak.

D. A resin-producing insect punctures a leaf and causes sap to thicken.

Answer: (C)

Explanation

Oak gall is an outgrowth caused by the gall wasp’s sting and egg-laying. A fungal infection or resin thickening does not describe the stated cause.

27. A formulator needs a plant gum that can serve as an excipient for solid dosage forms; which material fits this use?

A. Oak gall, which forms as a hard, spherical, grey-brown mass with a spiny surface.

B. Tragacanth gum, which is exuded from trunks and occurs as flattened, fan-shaped yellowish-white pieces.

C. Frankincense, which is obtained by trunk incision and occurs as pale-yellow to yellow-reddish tears.

D. Arabic gum, which is exuded from branches and occurs as rounded blond or reddish tears.

Answer: (D)

Explanation

Arabic gum is used as an excipient for solid dosage forms and is exuded from branches as rounded blond or reddish tears. Tragacanth is also a plant exudate, but its described form is flattened, fan-shaped pieces and the stated unit does not assign it this dosage-form use.