CIE iGCSE Co-Ordinated Science B6.1 Photosynthesis Exam Style Questions Paper 3
Question
(a) Fig. 4.1 is a photomicrograph of a cross-section through a root.
The boxes on the left show the letters of the parts labelled X and Y in Fig. 4.1.
The boxes on the right show some functions.
Draw lines to link each part with its main function(s).
Draw three lines.
(b) State the function of phloem.
(c) Mineral ions are necessary for plant health.
(i) Explain why nitrate ions are required for growth.
(ii) Magnesium ions are used to make a substance required for photosynthesis.
State the name of this substance.
(d) Table 4.1 shows some of the requirements for the processes of germination and photosynthesis.
Place ticks (✓) in the boxes to show the requirements for each process.
▶️Answer/Explanation
Ans : 4(a)
one mark for each correct line
;;;
4(b) transport of, dissolved sugars / sucrose / amino acids ;
4(c)(i) (nitrate ions) are needed to, synthesise / make, amino acids ;
amino acids make up proteins (which are required for growth) ;
one mark for each correct line
;;;
4(c)(ii) chlorophyll ;
4(d)
1 mark for each correct row ;;