O Level Science Weekly Quiz

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

Dislocation

Photosythensis

Translocation

Transipiration

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

Little pores on the underside of leaves

Little holes found on its stem

Holes that are used to transport water up the tree

None of the above

3. What is the original colour of iodine solution?

Redish brown

Colourless

Blue black

Green

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

It absorbs carbon dioxide

It acts as a base

It acts as a control

It absorbs oxygen

5. Which one is the byproduct of photosythensis

Stomata

Water

Oxygen

Carbon dioxide

6. 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 water in order to soften it

Boiling the leaf in iodine

Adding iodine drops in water towards the end of the experiment

7. Which one the following statements is not true?

Plants require magnesium in order to live

Plants require oxygen in order to live

Plants require water in order to live

8. Select the features that make leaves suited for Photosythnesis

They contain chlorophyll

They are green in colour

They are not thin

They have thick cuticles

They have stomata

They are broad

They have a transparent epidermis

They can respire

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

Methylated Spirit

Iodine crystals

Pure alcohol

Benedict’s solution

10. Where do cerials store the starch?

In their tussels

Within their seeds

In tubers

In their flowers

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

Because the leaf becomes brittle and needs to be softened

In order to kill the leaf

To remove cholorophyll

In order to soften the leaf

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