Tag: biology

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Questions Related to biology

Multiple choice biology excretion in living organisms excretion - plants excretion in plants excretion - animals

The secondary metabolite obtained from Catharanthus roseus is

  1. Vincristin

  2. Anthocyanin

  3. Menthol

  4. Nicotine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Secondary metabolites are some organic compounds that are produced by the plants but which are not directly involved in the growth.
This plant produces a variety of alkaloid material, anticancer drugs known as vincristine or vinblastine.
So, the correct option is 'Vincristin'
Multiple choice biology excretion in living organisms excretion - plants excretion in plants excretion - animals

How do leaves of plants help in excretion?

  1. Plants store waste materials in the vacuoles of mesophyll cells and epidermal cells.

  2. When old leaves fall, the waste materials are excreted along with the leaves.

  3. Both A and B.

  4. Plants release the waste material by transpiration.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Many plants store waste materials in the vacuoles of mesophyll cells and epidermal cells. When old leaves fall, the waste materials are excreted along with the leaves.

Therefore, the correct answer is option C.

Multiple choice biology excretion in living organisms excretion - plants excretion in plants excretion - animals

How do plants get rid of their excretory products? 

  1. Shedding leaves

  2. Shedding bark

  3. Both A and B

  4. Shading fruits
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants get rid of water by transpiration. Waste products may be stored in vacuoles or may be stored in leaves which fall off. Resine and gums are stored in xylem which are harmless to trees. When the leaves and bark are shed, the wastes are eliminated. Thus, option C is correct. 

Multiple choice biology excretion in living organisms excretion - plants excretion in plants excretion - animals

Plants get rid of waste by which of the following method?

  1. Transpiration

  2. Shedding of leaves

  3. Peeling of bark

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The waste products in the plants are stored by the vacuoles which is centrally located in a plant cell. It is filled with waste products until  the plant dies, it does not "excrete" any sort of waste. Plants also eliminate waste by its accumulation in the vacuoles of the aged leave cells which gets removed when such leaves are shed off. This process is called abscission. The excretory products include resins, gums, latex etc. Peeling of bark can also be considered as one of the excretory processes of plants.

Therefore, the correct answer is option D.

Multiple choice biology excretion in living organisms excretion - plants excretion in plants excretion - animals

In deciduous tree, waste is stored in

  1. Leaves

  2. Barks

  3. Roots

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Deciduous trees are those that shed their leaves once in a year and new leaves are grown. these are also known as the evergreen trees.

They store their waste in old and decaying leaves so that the waste gets removed as the leaves shed.
When leaves fall from a deciduous tree they contain crystals of waste materials that have built up as a result of metabolism.
So, the correct option is 'Leaves'

Multiple choice biology food and human health balanced diet and malnutrition balanced and unbalanced food digestive disorders diseases caused by changes in lifestyle diseases and toxic substance health and its maintenance

Protein and energy deficiency in food result in which disorder.

  1. Kwashiorkor

  2. Marasmus

  3. Diarrhoea

  4. Dysentary
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Marasmus is caused by a simultaneous deficiency of both proteins and calories (energy), typically affecting infants. Kwashiorkor, on the other hand, is primarily a protein deficiency with adequate calorie intake.

Multiple choice biology food and human health balanced diet and malnutrition balanced and unbalanced food digestive disorders diseases caused by changes in lifestyle diseases and toxic substance health and its maintenance

A patient is generally advised to specially take exposure to sun to prevent:

  1. Kwashiorkor

  2. Rickets

  3. Anaemia

  4. Scurvy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sunlight exposure helps the human body synthesize Vitamin D from cholesterol in the skin. A deficiency in Vitamin D leads to rickets, a condition characterized by weakened and softened bones in children.

Multiple choice biology food and human health balanced diet and malnutrition balanced and unbalanced food digestive disorders diseases caused by changes in lifestyle diseases and toxic substance health and its maintenance

Observe the given statements.
(i) Protein deficiency in diet leads to kwashiorkor disease.
(ii) Deficiency of only calories leads to marasmus disease.

  1. i and ii are true

  2. i is true and ii is false

  3. i is false and ii is true

  4. i and ii are false
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology food and human health balanced diet and malnutrition balanced and unbalanced food digestive disorders diseases caused by changes in lifestyle diseases and toxic substance health and its maintenance

Inadequate protein intake leads to Kwashiorkor. The subsequent edema is most closely related to inadequate synthesis of which protein?

  1. Gamma globulin

  2. Glucagon

  3. Insulin

  4. Albumin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Kwashiorkor is associated with a decrease in serum proteins. The drop is particularly striking in liver-synthesized protein i.e. albumin ( < 2 g/dl against 3-4.5 g/dl ) and lipoproteins. The protein synthesis in liver is dependent upon the supply of alimentary amino acids after each meal. So later if the protein deficiency persist there is again a drop in the level of albumin synthesis which can be noticed immediately.
The ingestion of protein rich food can control kwashiorkor. The treatment can be monitored by measuring plasma albumin concentration, disappearance of edema and gain in body weight.