O-LevelBiologyRespiration5090/21 · Oct/Nov 2023 · Q75 Marks
A root hair cell in a plant is respiring aerobically.
- (a)(i)Name the structures within the cell that carry out aerobic respiration.[1]
- (a)(ii)Write the balanced symbol equation for the aerobic respiration of glucose, C6H12O6.[2]
- (b)The plant experiences changing weather conditions including: high temperature heavy rain high winds low humidity State the weather condition that may lead to a root hair cell respiring anaerobically and explain your answer. weather condition explanation[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.
- [1] 7(a)(i) mitochondria / mitochondrion ;
- [2] 7(a)(ii) C6H12O6 + 602; 6H2O + 6CO2 ; A correct word equation for max 1 mark Ig any reference to energy or ATP
- [2] 7(b) heavy rain; soil waterlogged / AW + no air spaces / oxygen available ;
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