Please find your mark scheme and model answer below:
Bacterial diseases: tuberculosis
(OCR topic: TB)
OCR, January 2001
    1. Question:

    1. Name the organism that causes tuberculosis (TB).

      [1]
      Answer:

      Mycobacterium / mycobacteria; (A) micobacteria

      NOT micro / mycro / myo etc.


      Question:

    2. Describe how tuberculosis is spread from infected to uninfected people.

      [3]
      Answer:

      (infected people) breathe out / sneeze / cough / spit;

      airborne / droplets / mucus / saliva;

      (uninfected people) breathe in / enters nose or mouth;

      (transmitted in) sputum / phlegm;


  2. The figure shows the number of cases of tuberculosis recorded by health authorities in England and Wales between 1913 and 1998.




    Question:

  3. With reference to the figure, describe the changes in the number of recorded cases of tuberculosis between 1913 and 1998 in England and Wales.

    [4]
    Answer:

    decrease over, whole time period / stated time period;

    increase over stated time period;

    only slight decrease since approx 1970 / fairly constant at end of century/ slight rise at end of century;

    rates of decrease vary / AW;

    ref to numbers of cases to snow a cnange;;


    Question:

  4. Explain how social and economic factors have been important in reducing the number of cases of tuberculosis in developed countries such as Enaland and Wales.

    [4]
    Answer:

    improved housing;

    better ventilation in, housing / workplaces;

    less overcrowding / ref to fewer people sleeping in same room;

    less homelessness;

    improved standard of living / less poverty;

    education, qualified;

    better diet;

    better, medical services / hospitals; (e.g. supply of vaccines / antibodies / drugs)

    NOT vaccination / drugs unqualified or in medical context alone


[Total: 12]