Science MCQ (1 Marks)

In the absence of which of the following, will photosynthesis not occur in leaves?

The process by which plants break down glucose and release energy is called

Water and minerals are transported from roots to other parts of the plant by ______ .

When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings?

During photosynthesis, food is produced in the form of _____.

Which gas is released during photosynthesis?

Which of the following is the primary site for photosynthesis?

Which of the following raw materials is available in the air for photosynthesis?

Why do non-green parts of a leaf not produce starch?

What colour change indicates the presence of starch when iodine is added to a leaf?

Which of the following is used to test the presence of starch in a leaf?

Which of the following is known as the ‘Food factories’ of plants?

During respiration, glucose is broken down in the presence of ______.

Which gas is essential for photosynthesis in plants?

A leaf shows no colour change when iodine is added. What does this mean?

Which scientist worked extensively on plant respiration?

Which of the following proves that plants respire?

Which organelle helps in photosynthesis?

The part of the plant responsible for exchanging gases is:

Which experiment proves that sunlight is necessary for photosynthesis?

The oxygen released in photosynthesis comes from:

The word equation for respiration is:

Which component is not required for photosynthesis?

The food in plants is stored mainly in the form of:

Which pigment is responsible for the green colour of leaves?

A tree has its leaves on the topmost branches only. How does food reach the roots?

In an experiment, caustic soda is kept inside a bottle along with a leaf. The leaf does not turn blue-black after the starch test. What does this prove?

Which of the following is not a function of stomata?

In a science fair, a student places a plant inside a sealed bottle and keeps it in sunlight. After a few days, the plant is still green and healthy. What explains this phenomenon best?

A variegated leaf (green and white patches) was tested for starch after being placed in sunlight. The green parts turned blue-black, the white parts did not. What conclusion is valid?

A student observes that red ink travels up a plant stem. What should they infer?

Choose the correct order of processes that lead to food formation and storage in plants:

A plant was kept in sunlight but its roots were removed and the stem was placed in dry cotton. After three days, the plant wilted. Which conclusion is most valid?

After conducting the starch test, a leaf shows no blue-black colour even though it was green and placed in sunlight. What is the most likely reason?

A potted plant is kept in sunlight but inside a sealed glass chamber. After some time, moisture is seen on the inner walls of the chamber.
What could be the reason for this?