Question 1
Which component of blood has a role in preventing pathogens from entering the body?
Red blood cells
Blood plasma
Platelets
White blood cells
0%
DP IB Biology: SL
Topic Questions
6.3 Defence Against Infectious Disease
Question 2
What is the principle purpose of sebum secretions onto the surface of the skin?
To prevent microorganisms from sticking to the skin.
To lower skin pH, which slows down the growth rate of microorganisms.
To provide a surface texture to the skin that aids the evaporation of sweat.
To assist in the formation of blood clots as a way of sealing wounds after a cut or graze.
Question 3
This question is about the proteins involved in blood clotting.
Which shows the 3 boxes on the left joined to the appropriate one on the right?
Question 4
Which phrase best fits into the gap in the following sentence?
| The shape of antibody molecules gives each one a particular 3-D configuration. This allows each antibody to be ______________ each individual pathogen. |
...well suited to...
...specific to...
...functional against...
...the same shape as...
Question 5
Which pair of scientists carried out research work that built upon the discovery of antibiotics by Alexander Fleming in 1929?
Darwin and Wallace
Crick and Watson
Meselson and Stahl
Florey and Chain
