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The diagram shows a plant.
Which characteristic of living organisms is shown by the plant in the diagram?
539
542
581
Using the binomial system of naming organisms, the name of the lion is Panthera leo.
Which statement is correct?
582
533
524
The table shows the number of animals collected in a sample from a woodland and the groups to which they belong.
[Table_1]
How many arthropods in total, in this sample, have six or eight legs?
574
593
520
Which features do animal cells share with plant cells?
[Table containing chloroplast, cytoplasm and nucleus features is shown]
574
502
538
The diagram shows a cell with an actual size of 30 μm. What is the magnification of the diagram?
563
585
578
Red blood cells were placed in pure water.
Movement of water across the cell membrane caused a change in their appearance.
What caused this change in appearance?
[Table_1]
532
598
531
Some examples of substances moving across membranes are listed.
1. glucose molecules into the epithelium that lines the small intestine
2. nitrate ions from a dilute solution in soil into a more concentrated solution in root hair cells
3. water molecules from mesophyll cells into the air spaces of a leaf
For which must oxygen be present?
507
538
579
Which identifies the chemical elements found in proteins?
[Table_1: Key - ✓ = present, ✗ = absent]
515
589
553
What is the correct definition of the term enzyme?
504
508
546
Two sealed test-tubes containing aquatic plants and hydrogencarbonate indicator were set up.
The indicator in the sealed test-tubes shows the concentration of dissolved carbon dioxide present.
One of the sealed test-tubes was kept in the light for 24 hours and one of the sealed test-tubes was kept in the dark for 24 hours. The results are shown in the table.
What is the correct explanation of what has taken place?
543
555
572
The diagram shows a leaf as seen in cross-section under the microscope. What are tissues 1, 2 and 3? [Table_1]
595
579
597
The pie charts show the composition of 100 g of four different foods.
Which food provides the most energy?
513
583
598
One of the symptoms of the disease cholera is diarrhoea. This is due to water loss by osmosis caused by the cholera toxin.
Cholera toxins result in
536
522
600
The diagram shows an experiment kept at room temperature.
What is present in the water surrounding the membrane after 45 minutes?
524
544
551
In plants, what is transported by translocation?
594
596
570
The diagram shows human blood cells, as seen under a microscope.
What is the function of cell X?
553
547
519
Which row describes the features of passive immunity?
[Table_1]
570
509
523
Which row shows the approximate percentage of gases in expired air?
[Table_1]
571
534
561
What is the correct equation for aerobic respiration?
588
569
506
Lactic acid builds up in the muscles during vigorous exercise. During recovery, how is this lactic acid removed?
531
505
591
The neurones at synapses contain vesicles.
Which type of substance is found inside the vesicles?
576
585
557
The diagram shows the muscles that control the size of the pupil in an eye.
How do the muscles make the pupil smaller?
554
572
580
More adrenaline is produced by the adrenal glands when a person is frightened. This increase affects several parts of the body.
[Table_1]
Which rows are correct?
519
580
569
A patient has dye injected into the blood supply to his kidneys. The dye appears in his excretory system as shown. Which part is blocked?
579
598
539
Which statement is a reason why viruses are unharmed by antibiotics such as penicillin?
596
528
584
Several athletes have been banned from their sport for using the drug nandrolone. This drug helps the body to build up muscle tissue.
What sort of drug is nandrolone?
504
584
517
Which statement about the hormone FSH is correct?
541
541
520
HIV is transmitted by body fluids during sexual contact. HIV affects the immune system. Which statement best describes the effect of HIV?
585
560
560
How many chromosomes are there in each of the human cells shown in the table?
529
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563
The diagram shows a diploid cell and alleles R and r on one pair of chromosomes.
When this cell divides by mitosis, which daughter cells will be produced?
500
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506
The diagram shows breeding rats where the allele for grey fur is dominant to white fur.
Which two individuals are definitely heterozygous for fur colour?
598
518
594
The diagram shows a hydrophyte in a lake.
Which statement about the leaves is correct?
592
556
529
Some disease-causing bacteria survive treatment with an antibiotic.
Which statement about the surviving bacteria is correct?
534
507
591
Which row describes the energy flow into and through a food chain that starts with a plant?
[Table_1]
583
577
574
The diagram shows part of the nitrogen cycle.
What is one of the mineral ions?
597
557
598
Which part of a bacterial cell makes it useful in genetic engineering?
583
505
563
Which enzyme would be used in a biological washing powder?
543
568
565
What are the possible effects of deforestation?
[Table_1]
531
579
569
The bloodworm is an organism that is found in heavily polluted water.
The diagram shows where raw sewage flows into a river.
Where would there be fewest bloodworms?
571
507
598
