Tag: balanced diet and malnutrition

Questions Related to balanced diet and malnutrition

Along with all other nutrients, the body also needs an adequate supply of water.

  1. True

  2. False


Correct Option: A
Explanation:

The human body can last weeks without food, but only days without water. The body is made up of 50 to 75 per cent water. Water forms the basis of blood, digestive juices, urine and perspiration, and is contained in lean muscle, fat and bones. It helps to maintain the temperature of the body.

So, the correct option is 'True'.

Which of the following is not the molecule of information :

  1. Protien

  2. DNA

  3. RNA

  4. Deoxyribose


Correct Option: D
Explanation:

DNA contains the genetic information necessary for the synthesis of RNA and thereby all proteins necessary for the cell to function. RNA is a sequence of nucleotides that contain information for the synthesis of proteins. Deoxyribose is a sugar present in the nucleotides of DNA. Proteins are also provide  information. 

So, the correct option is  'Deoxyribose'

Leaves appear green because they reflect green color from light spectrum. The part in the leaf that is responsible for the reflection is

  1. Inner membrane of Chloroplast

  2. Thylakoid space

  3. Thylakoid membrane

  4. Stroma


Correct Option: C
Explanation:

Chloroplasts are green because they contain the green pigment chlorophyll in their thylakoid membranes. Chlorophyll is a pigment that absorbs red and blue light. So plants are green because chlorophyll reflects green light. 

So, the correct option is 'thylakoid membrane'.

Which of the following statements is false regarding the experiment carried out for photosynthesis?

  1. The two leaves experiment proved that photosynthesis took place only in the green part of the leaf which is exposed to sunlight

  2. Half leaf experiment indicate that co2 is required for photosynthesis

  3. In half experiment some part of leaf is inserted in a test tube having soaked cotton

  4. Starch is formed in a leaf


Correct Option: A
Explanation:
Variegated leaves have green parts (where the cells contain chlorophyll) and white parts (where there is no chlorophyll). Only the parts that were green become blue/black with iodine solution, showing the importance of chlorophyll in photosynthesis. The parts without chlorophyll do not photosynthesize, and so they do not make starch and the iodine does not change colour.
So the correct option is 'The two leaves experiment proved that photosynthesis took place only in the green part of the leaf which is exposed to sunlight'.

Chlorides are mineral salts, and cannot be affected by

  1. Chemical Actions

  2. Biological Action

  3. Temperature

  4. Turbidity


Correct Option: B

What causes excessive growth of algae and other aquatic plants?

  1. Waste matters

  2. Organic Nutrients

  3. Inorganic Nutrients

  4. Solid waste


Correct Option: C

Simple inorganic substances released into environment is reused by

  1. Pyrolysis Reactor

  2. Pyrolysis Chamber

  3. Simple Reactor

  4. Simple chamber


Correct Option: A

Inorganic salts, mineral acids and metal compounds are:

  1. Inorganic pollutants

  2. Organic pollutants

  3. Air pollution

  4. All of them


Correct Option: A

Organisms, obtain energy from sunlight and make organic matter from inorganic substance, known as _____________________.

  1. Heterotrophs

  2. Autotrophs

  3. Consumers

  4. Decomposers


Correct Option: B

Simple sugar of blood is

  1. Galactose

  2. Lactose

  3. Sucrose

  4. Glucose


Correct Option: D
Explanation:

Glucose is a simple monosaccharide sugar. It is a hexose sugar. It is an aldose sugar. Ingested carbohydrates are broken down into monosaccharides which are absorbed in the intestine. Glucose is absorbed in intestine. Glucose is also chief form of sugar in blood and circulates in blood to supply energy to visceral organs.