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The Venus flytrap is a plant that feeds on insects. When a fly lands on the leaf, the leaf folds very quickly and traps the fly. The leaves produce enzymes which digest the fly.
Which characteristics of living organisms are involved?
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The diagrams show four organisms not drawn to the same scale. Which organism is a prokaryote?
506
538
591
Sunflowers have yellow flowers.
Which cell structure is found in sunflower leaves but not in the petals of the flowers?
574
555
536
The diagram shows part of a leaf in cross-section.
Structures X and Y are both part of the same
511
549
572
How do carbon dioxide and oxygen move into and out of a mesophyll cell?
513
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598
Which process is involved in the uptake of glucose by the epithelial cells of kidney tubules?
591
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540
The data show the concentrations of sugar and starch in an onion.
[Table_1]
The onion is tested with Benedict's solution and iodine solution.
Which set of results is correct?
551
600
556
Which processes depend on the fact that water is a solvent? [Table_1]
516
511
589
The apparatus shown is used for an experiment on starch digestion. Which test-tube contains the most sugar after 20 minutes?
551
521
514
The graph shows how an enzyme-controlled reaction is affected by temperature.
Which statement explains the change in activity between X and Y?
529
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535
An experiment was carried out using the apparatus shown.
The carbon dioxide content of the water in each test-tube was measured at the start and again three hours later.
In which test-tube would there be a decrease in carbon dioxide content?
597
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536
Which region in the leaf of a green plant contains phloem?
531
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500
The diagram shows the activity of salivary amylase, pancreatic lipase and stomach protease at different pH levels.
From the graph, what is the optimum pH for the protease enzyme?
585
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593
The diagram shows a section through the stem of a dicotyledonous plant. Which part transports water and mineral ions?
563
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568
Roots and leaves both act as a source and sink for sucrose and amino acids at different times during the year. At which point in the year are the roots most active as a source?
564
557
521
The diagram shows a circulatory system.
Which vessels carry oxygenated blood?
533
531
592
What happens to the heart valves when the ventricles contract? [Table_1]
588
570
595
The diagram with the structure labelled X shows a bacterium with proteins on its surface. The diagram labelled Y shows proteins made by the human body.
Which row shows the correct combination for destroying the bacterium?
[Table_1]
509
596
537
The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30 seconds.
Which graph shows changes in the volume of air in the lungs of the same person immediately after they have done five minutes of vigorous exercise?
523
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502
Glucose is required for respiration.
Which other molecule is required for aerobic respiration?
546
511
586
Which row correctly shows the organ where each substance is excreted?
[Table_1]
504
599
543
The diagram shows the appearance of the iris and pupil in three different light conditions.
Which row shows the size of the pupil of the eye in each light condition?
[Table_1]
543
512
539
A student used two seedlings X and Y to investigate phototropism.
The diagram shows their investigation.
Which statement explains the difference in results between X and Y?
550
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580
In a mammal, body temperature is regulated by negative feedback.
As a result of negative feedback, what happens in the mammal’s body as the temperature of the external environment decreases?
511
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569
The graph shows the number of cases of MRSA in one country between 2001 and 2006.
Between which years was the greatest change in the number of cases of MRSA seen?
520
542
559
Pollen grains are transferred from the anthers to the stigma. The pollen grains adhere to the sticky stigma. The statements describe what happens next.
1. The pollen grain grows a pollen tube.
2. The pollen tube enters the ovule.
3. The pollen tube grows down the style.
4. The male nucleus fuses with an egg cell nucleus.
In which order do these stages occur?
588
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600
The diagram shows a woman's menstrual cycle.
On which day does ovulation occur, and on which day could fertilisation occur?
589
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511
Which method of contraception could also help prevent the spread of HIV?
583
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Which name is given to different versions of a gene?
571
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574
Which feature of meiosis ensures that the zygote is diploid?
554
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595
Which genotypes result in a person having blood group A?
517
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595
The diagram shows a plant reproducing asexually by growing a plantlet from a runner. The leaves of the plantlet appear different to the leaves of the parent plant.
Which statement explains the difference in the leaf shape of the plantlet?
519
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505
What results from the process of natural selection and adaptation?
582
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565
The diagram shows a food web in the ocean.
Which two animals are secondary and tertiary consumers?
517
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561
A student was given data on the change in the number of insects in a population over a period of twelve weeks. The student was asked to name and label each phase. What is the correct label for phase three?
508
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536
Insulin is now produced using genetically modified bacteria. Previously, diabetics were given insulin extracted from the pancreas of animals. Why is the insulin from bacteria regarded as a better ethical choice?
529
569
501
Plasmids are often used in genetic engineering. What is a plasmid?
578
510
597
The diagram shows a food web in a woodland.
What is most likely to happen if all of tree type X is removed by humans?
521
581
599
The increased availability of nitrates in rivers and lakes can result in the death of fish.
Which statement explains why fish die in rivers and lakes containing a high concentration of nitrates?
586
535
591
