Practical Medicinal Plant - Starch
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The general formula of the starch is ?
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C6H12O6
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C6H10O5
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C12H22O11
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This quiz explores the chemical properties of starch, a common polysaccharide found in plants. It assesses knowledge on starch's formula, solubility, reaction with chemicals, and its presence in plant tissues, enhancing understanding of plant biochemistry.
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- 2.
In leaves and stems : The amount Of the Starch is _____ ?
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Low
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High
Correct Answer
A. LowExplanation
The correct answer is "low" because leaves and stems primarily function as storage organs for carbohydrates in the form of starch. Starch is a complex carbohydrate that serves as an energy reserve in plants. Since leaves and stems are not major sites of photosynthesis, they do not produce a significant amount of glucose, which is converted into starch. Therefore, the amount of starch in leaves and stems is generally low compared to other plant parts like roots or seeds.Rate this question:
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- 3.
The Starch Reduces Fehling's solution
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That is Right
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That is wrong
Correct Answer
A. That is wrong -
- 4.
Starch is insoluble in Ethanol
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Right
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Wrong
Correct Answer
A. RightExplanation
Note That : Ethanol is an Organic Solvent ..Rate this question:
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- 5.
Starch with Iodine , on heating Gives Blue colour
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Right
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Wrong
Correct Answer
A. Wrong -
- 6.
Starch becomes transparent and invisible when we add _____ ?
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H2SO4
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Phenol
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Fehling's soution
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Option 4
Correct Answer
A. PhenolExplanation
When we add phenol to starch, it causes the starch to become transparent and invisible. This is because phenol reacts with the starch molecules, breaking down their structure and causing them to lose their ability to reflect light. As a result, the starch becomes transparent and appears invisible to the naked eye.Rate this question:
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- 7.
The size of granules of potato starch is ________ ?
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3 - 10 µ in diameter
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15 - 50 µ in diameter
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30 - 100 µ in diameter
Correct Answer
A. 30 - 100 µ in diameterExplanation
Potato starch granules have a size range of 30 - 100 µ in diameter. Starch granules are microscopic structures found in plants, including potatoes. They serve as a storage form of energy for the plants. The size of the granules can vary depending on the plant species and the specific type of starch. In the case of potato starch, the granules are relatively large, ranging from 30 to 100 µ in diameter. This size range allows for efficient storage and release of energy when the starch is broken down during cooking or digestion.Rate this question:
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- 8.
Which Starch is obtained from the endosperm of Triticum vulgare ?
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Potato starch
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Maize starch
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Wheat starch
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Rice Starch
Correct Answer
A. Wheat starchExplanation
Wheat starch is obtained from the endosperm of Triticum vulgare. The endosperm is the innermost part of the wheat grain and contains the majority of the starch. This starch is commonly used in food processing, as a thickening agent, and in the production of various products such as noodles, bread, and pastries.Rate this question:
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- 9.
Striations are absent in _____ ?
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Rice Starch
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Rice and potato stach
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Maize and rice starch
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Maize starch
Correct Answer
A. Maize and rice starchExplanation
Striations are absent in maize and rice starch. Striations refer to the presence of parallel lines or grooves on the surface of starch granules. Maize and rice starch granules have a smooth surface without any visible striations, unlike other starches such as potato starch.Rate this question:
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- 10.
The Hilum is Cleft with 3 - 5 rays in ______ ?
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Rice starch
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Potato starch
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Maize starch
Correct Answer
A. Maize starchExplanation
The correct answer is maize starch because the question is asking about the number of rays in the hilum, which is a characteristic feature of maize starch. Rice starch and potato starch do not have clefts or rays in the hilum.Rate this question:
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- 11.
Which Starch is obtained from the endosperm of Orayaza sativa ?
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Maize starch
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Rice starch
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Potato starch
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Wheat starch
Correct Answer
A. Rice starchExplanation
Rice starch is obtained from the endosperm of Oryza sativa, which is the scientific name for rice. The endosperm is the inner part of a seed that provides nourishment to the developing plant embryo. Rice starch is commonly used in various food and industrial applications due to its unique properties, such as its ability to thicken and stabilize food products.Rate this question:
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- 12.
________granules are 2 - 150 components
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Rice starch
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Maize starch
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Wheat starch
Correct Answer
A. Rice starchExplanation
Rice starch is the correct answer because it is a type of starch that is typically found in rice grains. Starch granules are small particles that make up starch, and rice starch granules fall within the size range of 2-150 components. Maize starch and wheat starch may also have granules within this size range, but the question specifically asks for the correct answer, which is rice starch.Rate this question:
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- 13.
We use starch as foods for adults
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Right
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Wrong
Correct Answer
A. WrongExplanation
as food for infants , not adults ... look at page 19 no. 4Rate this question:
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Current Version
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Mar 18, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 28, 2017Quiz Created by
Momenabdelmoniem
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