Amazing Race Day 1

Which statements about genetic modification are correct?

1 Bacteria are genetically modified because there are no ethical concerns about their use.

2 Crop plants can be genetically modified so that they produce additional vitamins.

3 Genetically modified bacteria can be used to produce insulin.

• 1, 2 and 3

• 1 and 2 only

• 1 only

• 2 and 3 only

What is a role of fat in the human body?

• to form glycogen

• to form urea

• to provide amino acids

• to provide a source of energy

Which statements about enzymes are correct?

1 All enzymes are made of protein.

2 Each enzyme works best at a certain pH.

3 Each enzyme works best at a certain temperature.

• 1, 2 and 3

• 1 and 2

• 1 and 3

• 2 and 3 only

In which reaction is hydrogen produced from long chain hydrocarbons?

• addition

• combustion

• cracking

• reduction

Which gas is identified by relighting a glowing splint?

• carbon dioxide

• hydrogen

• nitrogen

• oxygen

An element X has an atomic (proton) number of 3.

Which statement about X is correct?

• It forms ions by gaining electrons.

• It is a gas at room temperature and pressure.

• It is in Group III of the Periodic Table.

• It reacts with cold water.

Which statements about atmospheric pollutants are correct?

1 Carbon dioxide is a toxic gas produced by the incomplete combustion of fossil fuels.

2 Particulates can cause cancer and are produced by the incomplete combustion of

fossil fuels.

3 Methane can cause increased global warming and is produced by the

decomposition of vegetation.

4 Carbon monoxide is a toxic gas produced by digestion in animals.

• 1 and 3

• 1 and 4

• 2 and 3

• 2 and 4

An amateur scientist keeps some samples of radioactive rocks in a paper envelope.

Which emissions cannot get through the paper of the envelope?

• alpha-particles and beta-particles

• alpha-particles only

• beta-particles and gamma-rays

• gamma-rays only

In the circuit shown, component Y can be used to gradually change the brightness of the lamp.

What is component Y?

• a battery

• a resistor

• a switch

• a variable resistor

When electrical power is generated, energy is transferred between stores.

Which method of generating electrical power transfers gravitational potential energy to kinetic

energy?

• burning fuel in a power station

• generating hydroelectric power

• generating nuclear power

• generating geothermal power