Practical Medicinal Plant - Starch

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| By Momenabdelmoniem
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Momenabdelmoniem
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Quizzes Created: 3 | Total Attempts: 877
| Attempts: 138
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  • 1/13 Questions

    Which Starch is obtained from the endosperm of Orayaza sativa ?

    • Maize starch
    • Rice starch
    • Potato starch
    • Wheat starch
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About This Quiz

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.

Practical Medicinal Plant - Starch - Quiz

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  • 2. 

    Starch is insoluble in Ethanol

    • Right

    • Wrong

    Correct Answer
    A. Right
    Explanation
    Note That : Ethanol is an Organic Solvent ..

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  • 3. 

    Which Starch is obtained from the endosperm of Triticum vulgare ?

    • Potato starch

    • Maize starch

    • Wheat starch

    • Rice Starch

    Correct Answer
    A. Wheat starch
    Explanation
    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.

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  • 4. 

    The general formula of the starch is ?

    • C6H12O6

    • C6H10O5

    • C12H22O11

    Correct Answer
    A. C6H10O5
    Explanation
    The correct answer is C6H10O5. This is the general formula for starch, which is a complex carbohydrate composed of multiple glucose molecules bonded together. The formula indicates that starch consists of six carbon atoms, ten hydrogen atoms, and five oxygen atoms. Starch is an important energy storage molecule in plants and is also used as a thickening agent in food products.

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  • 5. 

    The Starch Reduces Fehling's solution

    • That is Right

    • That is wrong

    Correct Answer
    A. That is wrong
  • 6. 

    In leaves and stems : The amount Of the Starch is _____ ?

    • Low

    • High

    Correct Answer
    A. Low
    Explanation
    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.

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  • 7. 

    The Hilum is Cleft with 3 - 5 rays in ______ ?

    • Rice starch

    • Potato starch

    • Maize starch

    Correct Answer
    A. Maize starch
    Explanation
    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.

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  • 8. 

    Starch becomes transparent and invisible when we add _____ ?

    • H2SO4

    • Phenol

    • Fehling's soution

    • Option 4

    Correct Answer
    A. Phenol
    Explanation
    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.

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  • 9. 

    The size of granules of potato starch is ________ ?

    • 3 - 10 µ in diameter

    • 15 - 50 µ in diameter

    • 30 - 100 µ in diameter

    Correct Answer
    A. 30 - 100 µ in diameter
    Explanation
    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.

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  • 10. 

    We use starch as foods for adults 

    • Right

    • Wrong

    Correct Answer
    A. Wrong
    Explanation
    as food for infants , not adults ... look at page 19 no. 4

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  • 11. 

    ________granules are 2 - 150 components 

    • Rice starch

    • Maize starch

    • Wheat starch

    Correct Answer
    A. Rice starch
    Explanation
    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.

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  • 12. 

    Striations are absent in _____ ?

    • Rice Starch

    • Rice and potato stach

    • Maize and rice starch

    • Maize starch

    Correct Answer
    A. Maize and rice starch
    Explanation
    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.

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  • 13. 

    Starch with Iodine , on heating Gives Blue colour 

    • Right

    • Wrong

    Correct Answer
    A. Wrong

Quiz Review Timeline (Updated): Mar 18, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 18, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 28, 2017
    Quiz Created by
    Momenabdelmoniem
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