Subject :NSO Class : Class 8
Subject :NSO Class : Class 6
Ans 1:
Class : Class 10
The answer is actually C because starch consists of carbohydrates and sugars, but sugars is not the exact answer.
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 7
Ans 2:
Class : Class 7
here option c holds true because in option a and b we can make an exception with pulmonary artery and vein.
Ans 7:
Class : Class 9
Yes, the answer is option "C". It is not true that arteries will always carry oxygenated blood and the veins will always carry deoxygenated blood (pulmonary vein and artery).
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 3
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 7
Refer to the given graph which shows the effect of pH on the activities of three enzymes, X, Y and Z.
Which of the following are the possible locations in the alimentary canal of man where the three enzymes can be found?
| X | Y | Z | |
| A | Small intestine | Mouth | Stomach |
| B | Mouth | Stomach | Small intestine |
| C | Stomach | Small intestine | Mouth |
| D | Stomach | Mouth | Small intestine |
Ans 9:
Class : Class 9
The solution: Enzyme X works best and increases the rate of reaction at an acidic pH (less than 7) of about two2️⃣ ! Enzyme Y is very very very very very very very very very very very very very very very very very efficient @ slightly acidic pH i.e., slightly less than seven!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Enzyme Z is most efficient at an alkaline pH (more than 7!!!). And alkali means a base which is soluble in water. In humans, gastric juice of stomach (a J-shaped bag with thick inner walls. Meh.) has pH in the range of 1.5-2.5, where enzymes such as pepsin, rennin etc. carry out the digestion of food. Thus, enzyme X can be found in stomach. Similarly, the saliva in the mouth of humans has sliiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiightly acidic pH of 6.8, where salivary amylase enzyme is moooooooooooooooooooooooooooooooooooooooost effective! Thus, enzyme Y can be found in the buccal cavity. Small intestine has slightly alkaline pH of 7.8, where enzymes such as trypsin help in digestion of food. So, enzyme Z can be found in duodenum. Morus Alba is the scientific name of mulberry.