Cambridge O Level Combined Science Quiz

Which cell structure is present in a red blood cell?

• cell membrane

• cell wall

• nucleus

• vacuole

Which statement is correct for most enzymes within organisms?

• produced inside a cell and controls metabolic activity of a target organ

• produced inside a cell and controls metabolic activity within that cell

• produced outside cells and controls metabolic activity of a target organ

• produced outside cells and controls metabolic activity within a cell

After starch is ingested, in which order do these processes occur?

• absorption → assimilation → digestion

• absorption → digestion → egestion

• digestion → absorption → assimilation

• digestion → assimilation → absorption

Which describes an electron?

• relative charge is 0, relative mass is negligible

• relative charge is -1, relative mass is 1

• relative mass is negligible, relative charge is +1

• relative mass is negligible, relative charge is -1

Which statement about the formation of sodium chloride from metallic sodium and non-metallic chlorine is correct?

• Sodium atoms gain electrons and chlorine atoms lose electrons to form covalent bonds.

• Sodium atoms gain electrons and chlorine atoms lose electrons to form ionic bonds.

• Sodium atoms lose electrons and chlorine atoms gain electrons to form covalent bonds.

• Sodium atoms lose electrons and chlorine atoms gain electrons to form ionic bonds.

Which statement about the role of catalysts in a chemical reaction is correct?

• Catalysts increase the concentration of reactants.

• Catalysts increase the total amount of energy released by a reaction.

• Catalysts decrease the number of collisions in a reaction.

• Catalysts remain unchanged at the end of a reaction.

Which test and result identifies oxygen?

• limewater turns milky

• glowing splint relights

• lighted splint pop sound

• bromine water bromine decolourises

Cabbages grow best in alkaline soil.

In which soil samples does cabbage grow best?

• P and Q

• Q and T

• R and P

• S and T

Which graph shows constant non-zero acceleration?

• A

• B

• C

• D

A mother is told ‘Your baby weighs 3.0 kg’.

The gravitational field strength is 10 N / kg.

What are the mass and the weight of the baby?

• A

• B

• C

• D