Tag: biology

Questions Related to biology

Pick out the lectin from those given below

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Gum

  2. Diterpene

  3. Curcumin

  4. Morphine

  5. Concanavalin A

Show answer
Correct Option: E
Explanation:

Concanavalin A (ConA) is a type of lectin extracted from the bean Canavalia ensiformis.  So the correct option is D.

Colchicine is obtained from

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Bulb of Autumn Crocus

  2. Corm of Autumn Crocus

  3. Rhizome of Autumn Crocus

  4. Leaves of Autumn Crocus

Show answer
Correct Option: B
Explanation:

Colchicum autumnale, commonly known as Autumn crocus, meadow saffron is toxic autumn-blooming flowering plant belonging to family Colchicaceae. It is a perennial herb and native to Great Britain and Ireland. The bulb-like corms of Colchicum autumnale contain colchicine, a useful drug and it is also used in plant breeding. So, the correct answer is 'Corm of Autumn Crocus'.

Soluble fibre is useful medically for

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Optimum functioning of alimentary canal

  2. Reduction in blood cholesterol

  3. Binding of faecal matter

  4. Non-corrosion of intestinal lining

Show answer
Correct Option: B
Explanation:

Soluble fiber attaches to cholesterol and takes them out of the body from our system that helps in reducing blood cholesterol and also reducing the risk of heart disease. These are found in the food like oats, apples, nuts etc.

So, the correct option is 'Reduction in blood cholesterol'.

Part of Aloe which is medicinally important is

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Stem

  2. Root

  3. Flower

  4. Leaves

Show answer
Correct Option: D
Explanation:

Aloe vera is an evergreen perennial plant belonging to the family Asphodelaceae. It originates from Arabian Peninsula but grown wildly in tropical climates around the world. It is widely cultivated for agricultural and medicinal purposes. The leaves of Aloe are fleshy which are used for medicinal purposes in the treatment of skin.

So, the correct answer is 'Leaves'.

Dragon Plant is

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Draceaena draco

  2. Xanthorrhoea australis

  3. Aloe dichotma

  4. Yucca arborescens

Show answer
Correct Option: A
Explanation:

Dracaena draco, the Canary Island Dragon tree or Drago is a subtropical tree-like plant native to Canary Islands, Madeira and Cape Verde. It is a monocot and it belongs to family Asparagaceae. It is available as an ornamental tree in parks, gardens and drought tolerant water-conserving projects. So, the correct answer is 'Dracaena draco'.

(A) Reserpine (B) Ephedrine
(C) Ajmaline (D) Colchicine
Alkaloid pair which is completely unrelated with Rauwolfia is



biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. A, B

  2. B,C

  3. C,D

  4. B,D

Show answer
Correct Option: D
Explanation:

Ephedrine is an alkaloid with a phenethylamine skeleton found in various plants in the genus Ephedra.

Colchicine is an alkaloid isolated from Colchicum autumnale.
So the correct option is D.

Leaf juice of plant which can kill lice is

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Dracaena

  2. Gloriosa

  3. Colchicum

  4. Hyacinthus

Show answer
Correct Option: C
Explanation:

Colchicum autumnale, commonly known as Autumn crocus, meadow saffron is a toxic autumn-blooming flowering plant belonging to family Colchicaceae. It is a perennial herb and native to Great Britain and Ireland. Colchicum plants are deadly poisonous due to colchicine content. The leaf juice of Colchicum autumnale can be used to kill lice. So, the correct answer is 'Colchicum'. 

Cinchona quinine was first discovered at

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Portugal

  2. Peru

  3. Poland

  4. Central Asia

Show answer
Correct Option: B
Explanation:

While in Peru, the botanist Carl Linnaeus had a fever and it was cured by the bark of a cinchona tree.

So the correct option is B.

Reserpine is an alkaloid obtained from _____________.

biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Aswagandha

  2. Sarpgandha

  3. Opium

  4. Cannabis

Show answer
Correct Option: B
Explanation:

 Reserpine is an alkaloid obtained from roots of Rauwolfia serpentina (sarpgandha) family Apocynaceae. It is used in treatment of blood pressure,
snake bite and mental disorders.

So, the correct answer is 'Sarpgandha'

Assertion : Reserpine is hypertensive agent.

Reason : Reserpine is obtained from the dried roots of Rauwolfia serpentina.


biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: B
Explanation:

Reserpine that is obtained from the dried roots of Rauwolfia serpentina has been used by Indians so long as a cure for epilepsy, high blood pressure, insanity, intestinal disorders, cardiac diseases, snake bite and as an antihelminthic. Reserpine is widely employed today for hypertension.

So the correct option is B.