Active transport

Question 1

What are transport proteins?

Answer 1

They catch hold of a molecule on one side of the membrane. Turn around using energy and release it on the other side. Only carry specific molecules and not others.

Question 1

What is Active Transport?

Answer 1

The movement of substances across a partially permeable cell membrane against their concentration gradient which requires the use of energy from respiration.

Question 2

Cells that carry out Active transport usually have ?

Answer 2

Lots and plenty of Mitochondria

Question 3

As the rate of respiration increases

Answer 3

So does the rate of active transport

Question 4

E.g. 1

Answer 4

Moving mineral ions from the soil into plant roots. Moving nitrate ions from lower concentration in the soil into higher concentration inside the root hair cell.

Question 5

E.g. 2

Answer 5

Glucose is always moved out of the small intestine and kidney tubules against a large concentration gradient.

Question 6

Some organisms cant afford to lose these materials

Answer 6

Some organisms cant afford to lose these materials