Year 2017 P1 Pure Bio

The diagram shows the structure of a plant cell as seen using an electron microscope.

Which structures are involved in the process of enzyme synthesis within this cell?

• 1, 2, 4, 5 and 6

• 1, 3 and 6

• 2, 3, 5 and 6

• 3, 4 and 5

Some processes occurring in organisms are listed.

Which processes may involve respiration?

• 1, 2, 3 and 5

• 1, 3, 4 and 5

• 2, 3, 4 and 6

• 2, 4, 5 and 6

A plant cell containing sap with a concentration equivalent to a 10% sugar solution is placed in a solution containing 5% sugar. Which statement describes the movement of water?

• into the cell through the cell membrane by osmosis

• into the cell through the cell wall by osmosis

• out of the cell through the cell membrane by osmosis

• out of the cell through the cell wall by osmosis

Four test-tubes containing identical quantities of lipase and fat were set up in a water-bath at 37°C. The table gives further information about the contents of the test-tubes.

In which test-tube would digestion be most rapid?

• A

• B

• C

• D

Which row shows features of carbohydrates, fats and proteins?

• A

• B

• C

• D

Four statements about the active site of a human enzyme are given.

Which statements are correct?

• 1, 2 and 3

• 1 and 4 only

• 2 and 3 only

• 3 and 4 only

The list shows processes that occur when food is eaten.

• 1 → 2 → 4 → 3

• 3 → 2 → 4 → 1

• 4 → 3 → 1 → 2

• 4 → 3 → 2 → 1

Some processes that take place in the body are listed.

Which processes take place in the liver?

• 1, 2 and 4

• 1 and 4 only

• 2, 3 and 5

• 3, 4 and 5

The diagram shows the tissues in a cross-section of a leaf. The four tissue layers are labelled W, X, Y and Z. Starting with the layer containing the highest number of chloroplasts first and ending with the layer containing no chloroplasts, which sequence of letters shows the distribution of chloroplasts in a leaf?

• X → Y → W → Z

• X → Y → Z → W

• Y → X → W → Z

• Z → Y → X → W

Green plants use carbon dioxide.

How do plant cells in a leaf obtain carbon dioxide?

• 1 and 3

• 1 and 4

• 2 and 3

• 2 and 4