GCE Biology 2022
Past Questions

During the preparation of a temporary slide of an onion epidermal cell, a Form Five student added a drop of iodine solution. The most likely observation is that the

The vitamin that is produced in the human skin upon exposure to sunlight and is essential for calcium absorption in the intestine is

In the human circulatory system, which chamber of the heart generates the highest blood pressure?

In an experiment, a radioactive tracer introduced into the leaves of a well-watered plant was detected moving downward through the stem toward the roots. This movement is best explained by

The site of aerobic respiration in a eukaryotic cell is the

A patient's urine sample was found to contain glucose and proteins. This condition most likely indicates

Which of the following structures in the human female reproductive system is the site of fertilization?

In flowering plants, the part of the pistil that receives pollen grains during pollination is the

Which of the following best describes natural selection as proposed by Charles Darwin?

In a population of 500 beetles, 320 are green (dominant) and 180 are brown (recessive). Assuming Hardy-Weinberg equilibrium, what is the approximate frequency of the dominant allele G?

Which of the following observations provides the most direct evidence that evolution is still occurring in present-day populations?

In an experiment, a student measures the resting potential of a neurone as −70 mV and the peak action potential as +40 mV. What is the total change in membrane potential during depolarisation?

a) Explain the term 'cell organisation' as used in biology. (2 marks) b) Arrange the following levels of organisation in the correct order from the simplest to the most complex, and give ONE example o…

a) Draw a labelled diagram of a nephron and its associated blood supply. (8 marks) b) Describe how urine is formed in the mammalian kidney, naming the processes involved and where each occurs. (8 mark…

In humans, ABO blood grouping is controlled by multiple alleles: IA (for blood group A), IB (for blood group B), and i (for blood group O). IA and IB are both dominant over i, but codominant with each…

(a) Define the following terms as used in genetics: (i) Genotype (ii) Phenotype (iii) Codominance (iv) Test cross (b) In cattle, the gene for red coat (R) is incompletely dominant over the gene for wh…

a) What is meant by each of the following terms? i) Adaptive radiation ii) Convergent evolution iii) Vestigial structures (6 marks) b) Using Darwin's finches as an example, explain how adapti…