biology GCSE

Question 1

What is the name given to the process by which bacteria multiply?

Answer 1

binary fission

Question 2

what are the three ways an infectious disease can spread?

Answer 2

direct contact, water, air

Question 3

ways of preventing disease:

Answer 3

being hygienic, decrease vectors, isolation of infected individuals and vaccination

Question 4

What is a virus?

Answer 4

• tiny, non living particles that can rapidly reproduce inside the body
  -invade host cells to make new virus particles
  -once new virus is made, the cells burst which makes us feel ill

Question 5

what is Bacteria?

Answer 5

• small living cells that either damage cells directly or produce toxins
  -can reproduce the best in warm, moist conditions with lots of oxygen

Question 6

what is fungi?

Answer 6

• single celled organisms
• can penetrate tissues
• produce spores which can spread to other plants or animals

Question 7

what are protists?

Answer 7

• single celled organisms with a nucleus
• parasites, live in or inside other organisms
• transferred to a host organism by a vector
• damage our tissue making us feel ill

Question 8

TMV
(tobacco mosaic virus)

Answer 8

pathogen that affects plants
discolouration, less photosynthesis takes place

Question 9

HIV
(human immunodeficiency virus)

Answer 9

• spread by sexual contact or exchange of bodily fluids
• flu like virus and attacks lymph nodes and attacks immune system unless ANTI RETROVIRAL drugs are taken.
• AIDS is the final stage of HIV when your immune system is very badly damaged

Question 10

Measles

Answer 10

• fever and red skin rash
• can be fatal
• spread by air droplets

Question 11

gonorrhoea

Answer 11

• STI
• pain when urinating and and yellow/green discharge
• can have no symptoms