O Level Science Weekly Quiz

1. Which one is the byproduct of photosythensis

Oxygen

Stomata

Carbon dioxide

Water

2. What part of the plant are known as stoma?

Holes that are used to transport water up the tree

Little holes found on its stem

None of the above

Little pores on the underside of leaves

3. Which one the following statements is not true?

Plants require water in order to live

Plants require oxygen in order to live

Plants require magnesium in order to live

Plants require oxygen in order to live

4. Select the features that make leaves suited for Photosythnesis

They are not thin

They are green in colour

They have a transparent epidermis

They are broad

They can respire

They have thick cuticles

They have stomata

They contain chlorophyll

5. What the purpose of soda lime during the photosynthesis experiments?

It absorbs carbon dioxide

It acts as a control

It acts as a base

It absorbs oxygen

6. Where do cerials store the starch?

In their tussels

In their flowers

In tubers

Within their seeds

7. What is the original colour of iodine solution?

Green

Colourless

Redish brown

Blue black

8. Why are leaves boiled in alchohol during the test for starch?

Because the leaf becomes brittle and needs to be softened

To remove cholorophyll

In order to kill the leaf

In order to soften the leaf

9. Which of the following materials are used in the test for starch in leaves?

Methylated Spirit

Benedict’s solution

Iodine crystals

Pure alcohol

10. Which of the following is not a step in the test for starch in leaves

Observing colour changes after iodine is put on the leaf

Boiling the leaf in iodine

Boiling the leaf in water in order to soften it

Adding iodine drops in water towards the end of the experiment

11. The process by which sugars are transported from the leaves through microscopic tubes to the other parts of the plant is known as

Translocation

Dislocation

Transipiration

Photosythensis

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