Tag: biology

Questions Related to biology

'Triphala' powder is prepared from.

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

  1. Terminalia belerica, T. Chebula and T. Tomentosa

  2. Terminalia belerica, T. Chebula and phyllanthus emblica

  3. Terminalia Chebula, Phyllanthus emblica and Diospyros melanoxylon

  4. Terminalia chebula, buchanania lanzan and emblica officinalis

Show answer
Correct Option: A

Match List I with List II and select the correct answer.

List-I(Plants) List-II(Medicinal value)
a. Adhtoda vasica $1$. Antihelminthic
b. Artemisia maritima $2$. Ecpectorant
c. Digitalis purpurea $3$. Treatment for Heart Disease
d. Podophyllum emodi $4$. Purgative
biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. A-$2$, B-$1$, C-$3$, D-$4$

  2. A-$3$, B-$1$, C-$2$, D-$4$

  3. A-$2$, B-$4$, C-$3$, D-$1$

  4. A-$3$, B-$4$, C-$2$, D-$1$

Show answer
Correct Option: A

Tree of life is ____________.

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

  1. Branchial tree

  2. Lymphatic system

  3. Arbor vitae

  4. Loop of Henle

Show answer
Correct Option: C
Explanation:

Arbor vitae is known as tree of life. Arbor vitae is a branching tree like arrangement of grey and white matter visible in the cross sectional area of cerebellar hemispheres.

Which one of the following pairs is not correctly matched?

Drug Part of the plant giving the drug
A. Colchicin: Bulb
B. Digitoxin: Leaves
C. Ephedrin: Entireplant
D. Cocaine: Roots
biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. A

  2. B

  3. C

  4. D

Show answer
Correct Option: A

Secondary metabolites of plant weed 'vinca rosea' which is used as anti-cancerous drugs in

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

  1. Vincristine

  2. Cyclophosphamide

  3. Vinblastin

  4. Both A and C

Show answer
Correct Option: D
Explanation:

Vinca rosea is an ornamental plant. It produces secondary metabolites Vincristine. This vincristine is used as anti-cancerous drugs. Vinblastine is an alkaloid produced by the same plant. These both compounds are used in treatment of leukemias, lymphomas and childhood cancers,

Thus, the correct answer is 'Both A and C.'

Clove used as spice represents _________.

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

  1. Seed

  2. Leaves

  3. Flower buds

  4. Stem tip

  5. Terminal bud

Show answer
Correct Option: C
Explanation:

The spice of clove is obtained from flower buds of  Syzygium aromaticum, plant belonging to the family Myrtaceae. The unopened flower buds are plucked and air-dried to obtain the spice. The plant can continue to flower for up to 80 years. The clove has several therapeutical uses such as diabetes treatment, dental pain reliever preparation of toothpaste etc. other than the culinary uses.

Hence, the correct answer is 'Flower buds'

Aquatic plants are covered with mucilage which 
a. Make different part of plant spongy 
b. Protects them from pathogens and animals 
c. Functions as lubricant 

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. a, c

  4. All

Show answer
Correct Option: C
Explanation:

Aquatic plans are covered with mucilage which protects them from epiphytes, pathogens and animals. It also functions as lubricants. 

Turmeric powder is obtained from

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

  1. Curcuma longa

  2. Curcuma amada

  3. Cucurbita sativa

  4. Cassia tora

Show answer
Correct Option: A
Select the pair which contains a fodder and a medicinal plant. 
biology plant kingdom and the environment around us some important plants uses of plants as medicine medicinal plants

  1. Sesbania and Belladona

  2. Trifolium and Petunia

  3. Lupin and Colchicum

  4. Aloe and Trifolium

  5. Indigofera and Asparagus

Show answer
Correct Option: A
Explanation:

Aloe is a cactus-like plant of Solanaceae family is a native of America. The gel obtained from its leaves is used in various medicines to treat skin related problems.

Trifolium is native of Europe and belongs to family Fabaceae is used in various medicines as anti-inflammatory and antidermatosis agent.
They also serve as fodder, especially for cattle.
So the correct option is 'Aloe and Trifolium'

The drugs-caffeine, tannin and nicotine are

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

  1. Alkaloids

  2. Cortisones

  3. Steroids

  4. Mild alkalis

Show answer
Correct Option: A
Explanation:
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. It is the world's most widely consumed psychoactive drug. Unlike many other psychoactive substances, it is legal and unregulated in nearly all parts of the world. There are several known mechanisms of action to explain the effects of caffeine. The most prominent is that it reversibly blocks the action of adenosine on its receptor and consequently prevents the onset of drowsiness induced by adenosine. Caffeine also stimulates certain portions of the autonomic nervous system. Caffeine is a bitter, white crystalline purine, a methylxanthine alkaloid, and is chemically related to the adenine and guanine bases of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids. The term tannin refers to the use of oak and other bark in tanning animal hides into leather. The tannin compounds are widely distributed in many species of plants, where they play a role in protection from predation, and perhaps also as pesticides, and might help in regulating plant growth. The astringency from the tannins is what causes the dry and puckery feeling in the mouth following the consumption of unripened fruit, red wine or tea. Likewise, the destruction or modification of tannins with time plays an important role when determining harvesting times.
Nicotine is an anti herbivory alkaloid and potent parasympathomimetic stimulant found in plants, mostly those in the nightshade family. Nicotine acts as a receptor agonist at most nicotinic acetylcholine receptors (nAChRs), except at two nicotinic receptor subunits (nAChRα9 and nAChRα10) where it acts as a receptor antagonist. Nicotine is highly addictive. It is one of the most commonly abused drugs. 
So the correct option is 'alkaloids'.