Biology 5090/21 — May/June 2021
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
9
questions
80
marks
105
minutes
Topics Organisms and Their Environment · Plant Nutrition · Coordination and Control · Transport in Humans · Human Nutrition · Cell Structure and Organisation · +9 more
Q17MCell Structure and OrganisationMovement Into and Out of CellsPlant NutritionFree sample
The diagram shows a root hair cell from a lemon tree and some soil particles.
(a)
(i)1M
State one feature, visible in the diagram, which shows that a root hair cell is a plant cell.
______
(ii)4M
Describe how mineral ions pass from the soil into the root hair cell.
(b)2M
The lemon tree has grown in the same soil for many years so the soil now lacks magnesium.
Describe and explain the effect on the lemon tree of a lack of magnesium.
The rest of this paper
8 more questions- Q2Coordination and Control · Transport in Humans · Inheritance18M
- Q3Organisms and Their Environment · Sexual Reproduction in Plants · Cell Division and Reproduction9M
- Q4Human Nutrition · Coordination and Control8M
- Q5[Legacy] Support, Movement and Locomotion · Organisms and Their Environment8M
- Q6Biotechnology and Genetic Modification · Human Nutrition10M
- Q7Excretion · Transport in Humans · Organisms and Their Environment10M
- Q8Plant Nutrition · Organisms and Their Environment10M
- Q9Human Gas Exchange · Disease and Immunity10M
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