The optimal temperature for enzyme is 37°C.

When the catalase concentration increases, the amount of gas produced increases.

Diffusion is the movement of substance from a region of high concentration to a region of low concentration.

Osmosis is the net movement of water from a region of high water potential to a region of low water potential.

Active transport is the transport of substances against concentration gradient.

Our daily energy supply comes from carbohydrate, fat and protein.

If the gall bladder is removed, the patient will have difficulty in digesting fat because no bile is produced.

During inhalation, air rushes into the lungs and inflates the lungs.

During intensive exercise, the blood ph drops because more co2 is produced.

Skeletal muscles carry out anaerobic respiration in the absence of oxygen.

Stomata only present on the upper epidermis of the floating leaf of the water lily but not the lower epidermis.

There is no stomata on the lower epidermis of a floating leaf to prevent the mesophyll cells being suffocated.

A bubble photometer can only measure the rate of water absorption, but not the rate of transpiration.

Reflex actions do not involve the brain.

We are not conscious of reflex actions because the cerebrum is not involved.

Sexual reproduction involves two parents while asexual reproduction involves one parent only.

The edible part of the fruit provides food for seed germination.

Misuse of antibiotics may make a bacterium resistant to the antibiotics.