Plant Nutrition and Testing Methods
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Questions and Answers

What color indicates a positive result in the Biuret test for proteins?

  • Purple color (correct)
  • Yellow color
  • Green color
  • Blue color

What is the positive result in the Fehling test for reducing sugars?

  • Clear solution
  • Purple color
  • Yellow precipitate
  • Brick-red ppt (correct)

Which mineral is specifically mentioned as playing a role in the formation of chlorophyll?

  • Manganese
  • Copper
  • Iron (correct)
  • Zinc

What color would you expect in a negative result for protein detection using the Biuret test?

<p>Blue color (D)</p> Signup and view all the answers

What role does manganese play in plant physiology?

<p>Functioning of respiratory enzymes (C)</p> Signup and view all the answers

What is the primary role of nitrogen in plants?

<p>Synthesis of amino acids (B)</p> Signup and view all the answers

Which of the following effects is associated with potassium deficiency in plants?

<p>Retarded growth and yellowish bi-colored leaves (C)</p> Signup and view all the answers

What is a consequence of growing plants in a medium deficient in phosphate?

<p>Weak development (C)</p> Signup and view all the answers

Which mineral is a constituent of chlorophyll and is necessary for its formation?

<p>Magnesium (B)</p> Signup and view all the answers

Which of the following functions is NOT attributed to potassium in plant growth?

<p>Synthesis of amino acids (C)</p> Signup and view all the answers

Flashcards

What is nitrogen's role in plant growth?

Nitrogen is crucial for plants to build proteins. It's absorbed as ammonium or nitrates.

Why is phosphate important for plants?

Phosphate is needed for a plant's energy production. It helps create molecules like ATP and GTP.

What are some functions of potassium in plants?

Potassium assists plant growth by activating enzymes, protecting chlorophyll, and helping with carbohydrate metabolism.

How does magnesium contribute to plant growth?

Magnesium plays a vital role in forming chlorophyll, the green pigment crucial for photosynthesis.

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What happens to a plant if it lacks potassium?

When plants lack potassium, their growth is stunted, and their leaves turn yellow with green patches.

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Biuret Test

A test that detects the presence of proteins. A positive result is indicated by a purple color, while a negative result shows a blue color.

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Fehling's Test

A test to detect the presence of reducing sugars. A positive result is indicated by a brick-red precipitate, while a negative result shows a blue color.

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Iron and Chlorophyll

A mineral that is crucial in chlorophyll formation.

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Manganese's Role

A mineral that plays a vital role in the functioning of respiratory enzymes in plants.

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NPK Fertilizer

A common fertilizer type containing three key nutrients: nitrogen, phosphorus, and potassium.

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