B1- Chapter 1 Test

Question 0

What temperate would we grow microorganism at in industrial laboratories?

Answer 0

35*C

Question 1

What temperate would we grow microorganism at in a school?

Answer 1

25*C

Question 2

What temperate would we use to kill microorganisms

Answer 2

100*C

Question 3

We need a balanced diet to keep us healthy. Explain the ways in which an unbalanced diet can affect the body.

Answer 3

• balanced diet contains all the correct nutrients in the correct amounts
• balanced diet has the correct amount of energy
• too much energy leads to mass/weight increase e.g. Too much fat
• if activity increased use of energy increases
• too little energy leads to mass decrease- can lead to anorexia
• lack of vitamins leads to deficiency
• too much carbohydrate/ sugar/ overweight can lead to type 2 diabetes and other diseases

Question 4

What is metabolic rate?

Answer 4

Metabolic rate is the rate of chemical reactions in cells

Question 5

What factors can change a persons metabolic rate?

Answer 5

The proportion of fat to muscle and inherited factors

Question 6

Polio

Answer 6

It is difficult to kill the polio virus inside the body because the virus lives inside cells. The vaccine contains a inactive form of the polio virus. Te vaccine simulates the white blood cells to produce antibodies which destroy the virus.

Question 7

How many years did it take for the number of cases of polio to fall to zero?

Answer 7

8 years

Question 8

There have been no cases of polio in the UK for many years. But children are still vaccinated against the disease. Suggest one reason for this.

Answer 8

• disease could be reintroduced from abroad
• disease would spread back if insufficient
• disease would spread of it came back
• protection on holiday abroad
• high proportion of immune people needed to prevent epidemic

Question 9

Suggest two reasons why MRSA is causing problems in many hospitals.

Answer 9

• rosiest acne to most antibiotics
• contagious or easily passed on
• patients ill therefore less able to combat disease

Question 10

Explain why the death rate fell- Semmelweiss’ theory of washing hands

Answer 10

Chloride of lime/ hand washing killed bacteria picked up from corpses allow disease/ germs/ infection/ disinfectants

Question 11

Explain how Semmelweiss’s results could be used to reduce the spread of MRSA in a modern hospital.

Answer 11

People to wash their hands after contact with patient so bacteria/ pathogen/ MRSA not transferred to other patients