Quelpr
2 marksGenetic Concepts

CSEC Biology · January 2013 · Paper 2 · Question 1(b)(i)

Katz is suffering from sickle-cell anaemia.

How do the red blood cells of Katz differ from normal red blood cells?

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 1(a)(i)On the grid provided below, draw a graph to represent the data in Table 1.[5 marks]
  2. 1(a)(ii)Describe the shape of the graph between Months 1 and 3 and between Months 4 and 6.[2 marks]
  3. 1(a)(iii)Taking into account the concentration of oxygen at higher altitudes, give an explanation for the change in the red blood cell count at higher altitudes.[2 marks]
  4. 1(a)(iv)Suggest a suitable hypothesis for the results shown in Table 1.[2 marks]
  5. 1(a)(v)What would be a suitable control in an experiment being conducted to test the hypothesis suggested in (iv) above?[2 marks]
  6. 1(b)(ii)Explain why sickle-cell anaemia makes Katz feel tired easily.[2 marks]
  7. 1(c)(i)Suggest ONE condition under which the number of white blood cells in the human body will be increased.[1 mark]
  8. 1(c)(ii)State the function of TWO different types of white blood cells.[2 marks]
  9. 1(c)(iii)Suggest why red blood cells have a shorter life span than that of white blood cells.[1 mark]
  10. 1(d)(i)Describe TWO ways by which plants protect themselves from excess water loss.[2 marks]
  11. 1(d)(ii)State the name used to describe the mode of nutrition in plants.[1 mark]
  12. 1(d)(iii)Name the organelle found in the cells of green plants that is responsible for the type of nutrition stated in (ii) above.[1 mark]

More practice: the rest of this paper · more Genetic Concepts questions · all CSEC Biology past papers