741. Turmeric is obtained from which part of the plant:
1. Root
2. Stem
3. Fruit
4. Flower bud
Option “2” is correct
Turmeric is obtained from the stem of the plant.
742. Which one of the following animals stores water in the intestine?
1. Moloch
2. Camel
3. Zebra
4. Uromastix
Option “2” is correct Camels have some special abilities which enable it to walk for a long distance over sandy desert hills when there is neither water nor vegetation. That is why it is called “Ship of Desert”. A camel can drink more than 100 litre of water at once and they store it in their intestine for future needs.
Hydrophytes or aquatic plants are plants that have adapted to live in an aquatic environment (saltwater or freshwater). The are also referred as macrophytes. These plants require special adaptations for living submerged in water or at the water’s surface. Plants growing on saline soils or water are called halophytes.
744. Fish generally breathe through-
1. Skin
2. Nose
3. Gills
4. Fins
Option “3” is correct Fish use gills to breath and gills can only bring in oxygen when moist. Out of water, a fish’s gills dries out and then the fish dies.
745. The sugar present in DNA is:
1. Glucose
2. Fructose
3. Deoxyribose
4. Ribose
Option “3” is correct
The deoxyribose is sugar found in DNA. It is a variant of five carbon sugar called ribose. The DNA is an informational molecule found mainly in the nucleus of the cell.
746. How many pairs of ribs are there in a human body?
1. 12
2. 10
3. 14
4. 11
Option “1” is correct The human rib cage is made up of 12 paired (total 24 rib bone) rib bones. Each are symmetrically paired in right and left side. The ribs are flat, thin bones that together with the sternum make up the ribcage. The ribs provide protection for vital organs in the upper body, including the heart and lungs.
747. How many chambers are there in heart?
1. 2
2. 4
3. 6
4. 8
Option “2” is correct In humans, other mammals and birds, the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles.
748. Blood is-
1. Connective tissue
2. Epithelial tissue
3. Both of the above
4. None of the above
Option “1” is correct
Blood is a liquid connecting tissue. It flows inside the blood vessels and is viscous thick fluid.
749. Which of the following types of light are strongly absorbed by plants?
1. Violet and orange
2. Blue and red
3. Indigo and yellow
4. Yellow and violet
Option “2” is correct Plants use only certain colours from light for the process of photosynthesis. The chlorophyll absorbs blue, red and violet light rays. Photosynthesis occurs more in blue and red light rays and less or not all in green light rays.
750. In which category of food is the most amount of calories per unit:-
1. Vitamins
2. Fats
3. Carbohydrates
4. Proteins
Option “2” is correct Fats have highest calorie value per unit because of its higher rate of oxidation due to less oxygen.
