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Photosynthesis and Carbohydrate Use

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Questions and Answers

What is the primary function of chlorophyll in a plant leaf?

To produce carbon dioxide for respiration
To absorb water through the roots
To trap light energy and convert it into chemical energy (correct)
To store carbohydrates for future use

What is the purpose of de-starching a variegated plant kept in complete darkness?

To improve the absorption of nutrients from the soil
To remove existing starch in the leaves (correct)
To enhance the green color of the leaves
To prevent the uptake of carbon dioxide

What is the significance of boiling the leaf in water before exposing it to sunlight?

To enhance the color of the leaf
To prevent the loss of water through transpiration
To increase the chlorophyll content
To break down cell walls and denature enzymes (correct)

What is the role of sucrose in a plant's phloem?

To transport carbohydrates (A) Signup and view all the answers

What observation indicates the presence of starch in a leaf exposed to iodine?

The color turns blue-black (B) Signup and view all the answers

What is the primary role of sodium bicarbonate in the setup involving plant A?

It produces carbon dioxide for photosynthesis (B) Signup and view all the answers

In the context of this experiment, what is the function of NaOH (Sodium Hydroxide) placed inside plant B's bell jar?

It absorbs carbon dioxide from the air (D) Signup and view all the answers

What would be the expected outcome if the spongy mesophyll did not contain many chloroplasts?

Reduced gaseous exchange within the leaf (C) Signup and view all the answers

What is the main role of guard cells in relation to the stomata?

Regulate the opening and closing of stomata to control water loss (A) Signup and view all the answers

What is the significance of the vascular bundles, consisting of xylem and phloem, in a plant leaf?

Facilitate the transport of water, nutrients, and sugars within the leaf (C) Signup and view all the answers