Economic Botany Questions in English

(A) Quinine is an alkaloid obtained from the bark of the Cinchona tree.
Its molecular formula is $C_{20}H_{24}N_2O_2$.
Among the given options,the correct chemical composition is represented by $C_{20}H_{24}N_2O_2$.

(C) The correct answer is $(C)$.
Opium $(Poppy)$ is a plant from which opium is extracted.
In India,the cultivation of opium is strictly regulated by the government.
Currently,the largest area under legal opium cultivation in India is located in the state of Madhya Pradesh,followed by Rajasthan and Uttar Pradesh.

(C) Quinine is a well-known alkaloid obtained from the bark of the $Cinchona$ tree.
It is primarily used in the medicinal field,specifically for the treatment of malaria.
It also possesses antipyretic properties and is used to treat various types of fevers.

(C) Morphine is an alkaloid extracted from the latex of the poppy plant,$Papaver$ $somniferum$.
In the pharmaceutical industry,morphine is chemically processed to produce more stable and soluble forms for medical use,specifically $Morphine$ $sulphate$ and $Morphine$ $hydrochloride$.
These derivatives are widely used as potent analgesics for pain management.

(B) Hallucinogens are drugs that alter the thoughts, feelings, and perceptions of individuals who consume them.
Ganja and $LSD$ are both classified as hallucinogens.
Ganja is obtained from the hemp plant $(Cannabis sativa)$, and $LSD$ (Lysergic acid diethylamide) is derived from the fungus $Claviceps purpurea$.

(B) $Atropa$ $belladonna$ belongs to the family $Solanaceae$.
It is a medicinal plant from which the alkaloid atropine is obtained,primarily from its roots and leaves.
Atropine is widely used in medicine for dilating the pupil of the eye during ophthalmic examinations.
It also acts as an analgesic and antispasmodic agent.

(C) Morphine is a chemical compound extracted from the dried latex of the opium poppy ($Papaver$ $somniferum$).
It belongs to the class of organic compounds known as alkaloids,which are nitrogenous compounds that have significant physiological effects on humans.
Therefore,morphine is classified as an alkaloid.

(B) Ethnobotany is a branch of botany that focuses on the study of the relationship between plants and people,particularly how indigenous or primitive cultures use plants for food,medicine,rituals,and other purposes.
Therefore,the study of the relationship between primitive plants and humans is the primary focus of ethnobotany.

(B) Heroin is a diacetylmorphine derivative obtained from the latex of the opium poppy plant,$Papaver$ $somniferum$.
This plant belongs to the family $Papaveraceae$.

(A) $Rauwolfia \text{ } serpentina$, commonly known as Sarpagandha, is a medicinal plant.
The roots of this plant contain various alkaloids, most notably reserpine.
These alkaloids are used in the treatment of hypertension and mental disorders.
Therefore, the root is the medicinally most important part of the plant.

(D) The plant $Papaver$ $somniferum$ $(opium$ $poppy)$ produces a milky latex that contains approximately $25$ different alkaloids. These include Codeine,Morphine,Thebaine,and Narcotine. Therefore,all the listed options are alkaloids present in opium.

(B) The correct answer is $B$.
Reserpine is an alkaloid obtained from the roots of $Rauwolfia$ $serpentina$,commonly known as $Sarpgandha$,which belongs to the family $Apocynaceae$.
It is primarily used in the treatment of high blood pressure $(hypertension)$,snake bites,and various mental disorders.

(B) $Withania somnifera$ is the scientific name of the plant commonly known as $Ashwagandha$.
It belongs to the family $Solanaceae$.
This plant is widely used in $Ayurveda$ for its medicinal properties, particularly as an adaptogen to reduce stress and anxiety.

(A) $Tectona$ $grandis$, commonly known as Teak, is a tropical hardwood tree species.
It belongs to the family $Verbenaceae$ in the order $Lamiales$.
Therefore, the correct option is $A$.

(A) Bhang is obtained from the plant $Cannabis$ $sativa$.
It is a psychoactive drug derived from the dried leaves and flowering shoots of the plant.

(B) Morphine $({C_{17}}{H_{19}}{O_3}N)$ is a chemical compound classified as an alkaloid.
It is extracted from the opium poppy,scientifically known as $Papaver\, somniferum$.
In medical practice,it is widely used as a potent analgesic (painkiller) to manage severe pain.

(B) The correct answer is $Calendula \ officinalis$.
$Calendula \ officinalis$,commonly known as pot marigold,is widely recognized for its medicinal properties.
It is used in traditional medicine for its anti-inflammatory,antiseptic,and wound-healing properties.
$Jatropha \ curcas$ is primarily known for its potential as a biofuel source.
$Tagetes \ patula$ (French marigold) is mainly used as an ornamental plant.
$Sesbania \ aegyptiaca$ is often used as a green manure or fodder crop.

(C) Bhang, Ganja, and Hashish $(Charas)$ are all psychoactive drugs derived from the plant $Cannabis \, sativa$ (commonly known as hemp).
These substances are obtained from different parts of the plant: Bhang is prepared from the dried leaves and flowers, Ganja is obtained from the unfertilized female inflorescence, and Hashish $(Charas)$ is the resinous extract obtained from the flowering tops of the plant.
Therefore, the correct option is $C$.

(B) $Atropa$ $belladonna$ (family $Solanaceae$) is the source of the alkaloid drug atropine.
Atropine is extracted from the leaves of the plant.
It is medically used to dilate the pupils for eye examinations and to treat certain eye conditions.

(D) The plants mentioned are all well-known for their medicinal properties:
$1$. $Cinchona$: The bark of this plant is the source of quinine, used to treat malaria.
$2$. $Opium$ $(Papaver \text{ somniferum})$: It is used as a source of various alkaloids like morphine and codeine, which act as painkillers and sedatives.
$3$. $Rauwolfia$ $(Rauwolfia \text{ serpentina})$: It is the source of reserpine, which is used to treat high blood pressure and mental disorders.
Therefore, all of these are medicinal plants.

(D) $Ginseng$ $(Panax \, schinseng)$ is associated with the family $Araliaceae$.
It is a very important medicinal plant of $China$.
The drug is obtained from the roots of the plant and is used to cure a variety of diseases.
$Panax \, quinquefolium$ $(American \, Ginseng)$ is used as its substitute.

(A) The moisturizing gel is extracted from the leaves of the $Aloe \text{ } vera$ plant.
It is widely used in the cosmetic and pharmaceutical industries due to its soothing and hydrating properties.

(C) Cotton fibres are single-celled structures composed primarily of cellulose, which is a polysaccharide.
Cellulose is a linear polymer of glucose units linked by $\beta-1,4$-glycosidic bonds.
It provides structural support to the plant cell wall.
Therefore, the correct answer is $(c)$.

(D) The correct answer is $D$.
$1$. Gramineae (Poaceae): Includes plants like $Saccharum$ $munja$ (Munja),which provides fibres from its stem and leaves.
$2$. Malvaceae: Includes plants like $Hibiscus$ $cannabinus$ (Deccan hemp) or $Abutilon$ $theophrasti$,which provide bast fibres from the stem.
$3$. Linaceae: Includes $Linum$ $usitatissimum$ (Flax),which provides high-quality linen fibres from the pericycle of the stem.
Since all these families contain plants that produce economically important fibres,the correct option is $D$.

(D) Fibre-yielding plants are found in various plant families.
$1$. Bombacaceae includes plants like $Ceiba$ $pentandra$ (Kapok),which provides fibre.
$2$. Moraceae includes plants like $Cannabis$ $sativa$ (Hemp),which is a well-known source of bast fibre.
$3$. Tiliaceae includes plants like $Corchorus$ $capsularis$ (Jute),which is a major source of commercial fibre.
Since all these families contain significant fibre-yielding plants,the correct answer is $D$.

(D) Many plant families contain species that yield commercial fibres.
$1$. $Urticaceae$: Includes plants like $Boehmeria$ $nivea$ (Ramie),which provides high-quality bast fibre.
$2$. $Leguminosae$ (Fabaceae): Includes plants like $Crotalaria$ $juncea$ (Sunn hemp),which is a major source of fibre.
$3$. $Amaryllidaceae$: Includes plants like $Agave$ species (Sisal),which are well-known for leaf fibre production.
Since all these families contain significant fibre-yielding plants,the correct option is $D$.

(A) Textile fibres are defined by their ability to be spun into yarn or made into fabrics. To withstand the mechanical stresses of spinning,weaving,and daily use,these fibres must possess high tensile strength. In contrast,filling fibres (like kapok) are used for stuffing and do not require high tensile strength.

(B) The term $New \ World \ cotton$ refers to the species of cotton that originated in the Americas,specifically $Gossypium \ hirsutum$ and $Gossypium \ barbadense$.
These species were introduced to other parts of the world after the discovery of the Americas.
In contrast,$Old \ World \ cotton$ refers to species like $Gossypium \ arboreum$ and $Gossypium \ herbaceum$,which are native to Asia and Africa.
Therefore,$American \ cotton$ is known as $New \ World \ cotton$.

(A) $Gossypium \text{ barbadense}$ is a species of cotton plant that is native to tropical South America.
It is widely known as Egyptian cotton, Sea Island cotton, or Peru cotton.
Therefore, among the given options, Peru cotton is the correct identification.

(B) Egyptian cotton is widely considered the most suitable for hosiery and fine textile products.
This is because Egyptian cotton fibers are exceptionally long (extra-long staple),which allows them to be spun into very fine,strong,and soft yarns.
These properties make the resulting fabric highly durable,breathable,and comfortable,which are essential characteristics for high-quality hosiery.

(D) The cotton industry involves several sequential processes to convert raw cotton into finished textile products.
$1$. $Picking$: The process of harvesting mature cotton bolls from the plants.
$2$. $Ginning$: The process of separating cotton fibers (lint) from the cotton seeds.
$3$. $Lapping$: $A$ process in textile manufacturing where cotton fibers are formed into a uniform sheet or 'lap' before carding.
Since all these processes are integral parts of the cotton industry,the correct answer is $D$.

(B) The correct answer is $B$. The fibres of flax ($Linum$ $usitatissimum$) are obtained from the pericycle of the stem. These are known as bast fibres. They are stronger and more durable than cotton fibres,which are epidermal hairs of the seed.

(C) . Retting is the process in which plant fibres $(jute, hemp, flax)$ are separated by the activity of micro-organisms.
Plants are immersed in water for a considerable period; during this period, they absorb water and swell.
The water medium becomes rich in bacteria $(Clostridium\, butyricum)$, which hydrolyze the pectic substances of the middle lamella of the fibrous tissue.

(C) The correct answer is $C$.
$Linum$ $usitatissimum$ (Flax) fibres are highly water-resistant and possess high tensile strength,making them ideal for manufacturing fishing nets and ropes.
These fibres exhibit increased strength when wet compared to their dry state,which is a critical property for marine applications.

(C) The correct answer is $C$.
Ramie, also known as China grass $(Boehmeria \text{ } nivea)$, belongs to the family $Urticaceae$.
Its fibers are known for being among the toughest, longest, and strongest natural plant fibers.

(A) Manila hemp,scientifically known as $Musa \, textilis$,belongs to the family $Musaceae$.
It is a fiber crop,and its fibers are considered the strongest among all natural fibers.
These fibers are extracted from the leaf sheaths of the plant.

(D) Agave or Sisal fibres are obtained from the leaves of various species of the genus $Agave$,which belongs to the family $Amaryllidaceae$.
Species such as $A. cantala$,$A. sisalana$,and $A. funkiana$ are all commercially cultivated sources of these fibres.

(C) New Zealand hemp,scientifically known as $(Phormium \, tenax)$,belongs to the family $(Agavaceae)$.
It is a perennial plant native to New Zealand and Norfolk Island,widely cultivated for its strong,durable fibers used in ropes and textiles.

(B) Bowstring hemp is a strong,durable fiber obtained from the leaves of plants belonging to the genus $Sansevieria$.
Specifically,$Sansevieria$ $zeylanica$ and $Sansevieria$ $trifasciata$ are commonly known as bowstring hemp because their fibers were historically used to make bowstrings.
Therefore,the correct option is $B$.

(A) The fruit of $Cocos$ $nucifera$ (coconut) is a drupe. In this fruit, the mesocarp is fibrous and is commonly known as coir. This fibrous mesocarp is used for making ropes, mats, and various household items.

(C) Coir fibre is obtained from the mesocarp of the coconut fruit,$Cocos$ $nucifera$.
It is a versatile natural fibre widely used in the manufacturing of various household and industrial products.
Specifically,it is extensively used for making mats,carpets,brushes,ropes,and upholstery padding.
Therefore,both mats and brushes are prepared using coir fibre.

(C) Wicker work refers to the process of weaving pliable plant materials into furniture,baskets,or other items. $Bambusa$ (Bamboo) is widely used for this purpose due to its strength,flexibility,and durability. Therefore,wicker work fibre is obtained from $Bambusa$.

(A) Red silk cotton,commonly known as the Semal tree,is obtained from the species $Salmalia malabarica$ (also known as $Bombax ceiba$).
It is a large deciduous tree belonging to the family $Malvaceae$.
The tree produces large,red flowers and capsules containing seeds covered with silky,cotton-like fibers,which are used for stuffing pillows and cushions.

(B) Tapa cloth is a traditional cloth made from the inner bark of certain trees,primarily the paper mulberry tree $(Broussonetia papyrifera)$.
This tree belongs to the family $Moraceae$.
The process involves stripping the bark,soaking it,and beating it until it becomes thin and fabric-like.

(D) Paper making utilizes various plant fibres.
In India,$Bamboosa$ (bamboo) is the most common source.
In western countries,conifers like $Picea$,$Pinus$,and $Abies$ are widely used.
Additionally,$Boswellia$,$Eucalyptus$,various grasses,cotton rags,$Fagus$,and $Populus$ species are also utilized for the production of paper pulp.
Therefore,all the given options are correct.

(A) Munj is a type of fibre obtained from the plant $Saccharum$ $\text{munja}$.
It belongs to the family $Poaceae$.
The fibres are extracted from the lower part of the stem and the leaves of this plant, which are used for making ropes, mats, and baskets.

(A) Manila hemp,also known as $Abaca$ $(Musa textilis)$,is a species of banana native to the Philippines. The fiber is obtained from the leaf sheaths (leaf bases) that wrap around the trunk of the plant. These leaf bases are stripped and processed to extract the strong,durable fibers used in making ropes and textiles.

(A) The correct botanical classification for the given plants is as follows:
$(1)$ Cotton belongs to the family $Malvaceae$ $(II)$.
$(2)$ Sisal hemp ($Agave$ $sisalana$) belongs to the family $Agavaceae$ $(III)$.
$(3)$ Patua ($Hibiscus$ $cannabinus$) belongs to the family $Malvaceae$ $(II)$.
$(4)$ Munj ($Saccharum$ $munja$) belongs to the family $Gramineae$ or $Poaceae$ $(IV)$.
$(5)$ Jute ($Corchorus$ $capsularis$) belongs to the family $Tiliaceae$ $(I)$.
Therefore, the correct matching sequence is $1-II, 2-III, 3-II, 4-IV, 5-I$.

(D) Sisal hemp is obtained from the leaves of the plant $Agave$ $sisalana$,which belongs to the family $Agavaceae$.
These are classified as hard fibres,not soft fibres.
They are extracted as bast fibres from the leaves and are primarily used for manufacturing ropes,twines,and mats due to their high tensile strength and durability.
Therefore,the statement that it is a soft fibre is incorrect.

(C) The epidermal hairs present on the surface of the $Cotton$ seed are of two types:
$1$. $Lint$: These are long, easily extractable fibres used in the textile industry.
$2$. $Fuzz$: These are short, non-extractable fibres that remain attached to the seed coat after ginning.
Therefore, $Lint$ and $Fuzz$ are characteristic features of $Cotton$ fibres.