Biology 9700 · AS & A Level · Infectious diseases

Infectious diseases — practice question

Diseases may be infectious or non-infectious.
(a)[2]

Explain how an infectious disease differs from a non-infectious disease.

(b)[2]

Blood meals are a good source of protein for Anopheles for egg production. Explain why blood is a good source of protein.

(c(i))[3]

Describe and explain the difference between the worldwide distribution of Anopheles shown in Fig. 5.2 and the worldwide distribution of malaria.

(c(ii))[3]

Suggest why $A.\ gambiae$ is responsible for most of the transmission of Plasmodium.

(ii)[3]

Suggest why A. gambiae is responsible for most of the transmission of Plasmodium.

(d(i))[1]

Name one organism in Fig. 5.3 that is a tertiary consumer.

(d(ii))[3]

Explain, in terms of energy transfer, why it is likely that the eastern green mamba feeds on other organisms in addition to yellow winged bats.

(d(iii))[2]

Suggest how the information in Fig. 5.3 can be used in the control of malaria in other areas of Kenya.

(e)[2]

Suggest which parts of the sweet potato plants are the main food source for adult A. gambiae and explain your answer.

Worked solution & mark scheme

This 21-mark question has a full step-by-step worked solution and mark scheme. One marking point: An infectious disease is caused by a pathogen and is transmissible

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI