B1 Topic 3

Question 1

What is a drug?

Answer 1

Drugs are substances that change chemical reactions in the body.

Question 2

What type of drug is caffeine?

Answer 2

Stimulant.

Question 3

What is a long term affect of alcohol use?

Answer 3

Liver damage.

Question 4

How does carbon monoxide damage the body?

Answer 4

Reduces the body’s ability to carry oxygen.

Question 5

What is a carcinogen?

Answer 5

A chemical that can cause cancer.

Question 6

What is a pathogen?

Answer 6

A disease-causing micro-organism.

Question 7

Which type of micro-organisms are most pathogens?

Answer 7

Pathogens are mostly bacteria. Only a few fungi are pathogens.

Question 8

One of the main problems with viruses is that:

Answer 8

They damage the host cell when they reproduce.

Question 9

Which of these is one of the main problems with bacteria?

Answer 9

They produce toxins or ‘pathogens’.

Question 10

Is polio a virus?

Answer 10

Yes, they are.

Question 11

What is a lysozome?

Answer 11

An enzyme that kills bacteria.

Question 12

What is one way that antibiotics work?

Answer 12

Some types of antibiotic work by stopping bacteria reproducing.

Question 13

What is an example of vertical transmission?

Answer 13

A disease passing from a mother to her unborn child is vertical transmission.

Question 14

How is TB transmitted?

Answer 14

Droplets in the air.

Question 15

Which of the following is not an indicator of air pollution:

1. Blackspot fungus on roses
2. The presence of lichens
3. The presence of bloodworm

Answer 15

The presence of bloodworm is not an indicator of air pollution. It’s an indicator of water pollution.

Question 16

Which of the following is a positive impact of humans on the environment?

1. Raw materials being used up
2. Recycling increasing
3. More waste being produced

Answer 16

Recycling increasing.

Question 17

What effect does sulfur dioxide have on the environment?

Answer 17

Sulfur dioxide contributes to acid rain.

Question 18

Which type of lichens can survive in quite polluted air?

Answer 18

Crusty.

Question 19

What causes eutrophication?

Answer 19

Acid Rain.

Question 20

Why do we need to recycle metals?

Answer 20

As yet, we have not run out of any metals and recycling metals uses less energy and so it is cheaper.

Question 21

Why are alloys difficult to recycle?

Answer 21

Alloys are mixtures of metals which can make them difficult to recycle.

Question 22

Which process adds carbon dioxide to the atmosphere?

Answer 22

Respiration adds carbon dioxide to the atmosphere.

Question 23

Which of the following is not a method of converting nitrogen to nitrates?

Answer 23

Lightning causes nitrogen to be converted to nitrates.