(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Name the following:

The membrane which allows water molecules to pass through, but not sugar molecules.

Fill in the Blank
______  serves as a medium for the transport of inorganic salts and food molecules in the plant.

Fill in the Blank
Water and mineral salts absorbed by root is known as ______.

Name the hormone produced by the following gland giving one function: Adrenal medulla

Write about some functions of adrenal glands.

Is the following gland an exocrine or an endocrine gland?

Adrenal

A leaf is a food factory. Explain.

Adrenaline is also known as emergency hormone.

Our hair stands on their ends during fear.

Some adult women may develop facial hairs. What may be the cause for it?

Sketch and label the structure of adrenal gland.

On a bright sunny day, water weeds growing in an aquarium were actively giving off bubbles of gas. Use this information to answer questions that follow:

1. Name the process occurring in the water weed that has resulted in the evolution of these bubbles.
2. Of what gas do these bubbles consist?
3. Briefly describe the reactions occurring in the leaves of the water weeds leading to the evolution of these bubbles.
4. Give an overall balanced chemical equation to represent the process named in (i) above.

What is meant by a destarched plant? How can it be destarched?

Using the destarched plant describe step by step how would you proceed to prove that in the absence of light the leaf cannot manufacture starch?

A healthy croton plant bearing variegated leaves was kept in a dark cupboard to destarch it after which it was placed in sunlight for a few hours. One of the leaves was then plucked and an outline of the leaf marking the green and the non-green regions was drawn. The leaf was then tested for starch. Using the above information, answer the following questions:

1. State the aim of the above experiment.
2. Name the chemical used for testing the presence of starch.
3. Why is the leaf boiled in water and alcohol before testing for the presence of starch?
4. What change is seen on the leaf after the starch test?
5. Give the chemical equation to represent the process of starch formation in plants.

A candidate in order to study the importance of certain factors in photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning, she covered one of the leaves with black paper in the center only. She placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.

1. What aspect of photosynthesis was being investigated?
2. Is there any control in this experiment? If so, state the same.
3. Why was the plant kept in the dark before the experiment?
4. Describe step by step how the candidate proceeded to test the leaf for the presence of starch.

Name the following:

In-plant cells, carbohydrates are stored in which form.

Name the following:

The chemical substance used to test the presence of starch in the cell of a leaf.

Give the Technical Term: Name the gland in the body that secretes the so-called ‘Emergency hormone’.

Give the Technical Term: When your mouth dries up and the heart begins to beat faster, which hormone brings about the feeling?