TYS Sec 3 Revision (Movement, Nutrients, Digestion)

The table below shows the results of an analysis of the cell sap from a marine unicellular organism, organism X, and its surrounding seawater.

The student deduced that the cell
I: accumulates chloride ions by diffusion

II: removes sodium ions by active transport

III: accumulates sodium ions by active transport

IV: accumulates potassium ions by active transport.

Which of his deductions are correct?

• I, II and III only

• I, II and IV only

• I, III and IV only

• II, III and IV only

The data below shows the concentration of a substance inside and outside four different cells.

Which cell would need the most energy to absorb the substance by active transport?

• A

• B

• C

• D

A student was asked to identify the two types of food substances in each of three test tubes W, X and Y. The table shows the results of the student's tests.

Which of the following can be concluded from the results above?

• Protein and sucrose are present in tube W.

• Maltose and starch are present in tube Y.

• Protein and glucose are present in tube X.

• Starch and sucrose are present in tube Y.

The flow chart illustrates how smaller units of molecules join to form bigger and more complex molecules by condensation.

1 -> 2 -> 3

Which option correctly represents 1, 2 and 3?

• A

• B

• C

• D

What is the answer?

• A

• B

• C

• D

What is the answer?

• A

• B

• C

• D

What is the answer?

• A

• B

• C

• D

In patients with cystic fibrosis, thick mucus blocks the pancreatic duct. This results in the decrease in the digestion of

• Proteins

• Glycerol

• Maltose

• Sucrose

What is the answer?

• A

• B

• C

• D

Aspartate aminotransferase (AST) is an enzyme found in the liver. Cell organelles that are essential for the production of AST include

• Ribosomes

• Golgi apparatus

• Mitochondria

• Smooth endoplasmic reticulum