No questions found
The diagrams show a test-tube containing pond water. The green colour is caused by microorganisms that have chloroplasts. Which characteristics of living organisms are shown?
514
561
538
Which shows an organism that has been named using the binomial system?
533
574
531
The diagram shows an arthropod. To which group does it belong?
535
560
514
Which features do animal cells share with plant cells? [Table_1]
551
592
541
The diagram shows a drawing of a human cheek cell.
The distance between points X and Y on the diagram is 30 mm.
The actual length of the cell between X and Y was 60 µm.
What is the magnification of the cell?
563
596
540
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?
583
564
592
Which process depends on active transport?
510
598
587
Which identifies the chemical elements found in proteins?
[Table_1: Elements in Proteins Table with key]
508
532
563
A student carries out a test to see whether the solution in a test-tube contains protein.
Which row shows the correct food test and a positive result?
[Table_1]
516
550
557
The diagram shows an experiment investigating the effect of light intensity on an aquatic plant.
Photosynthesis occurred in both test-tube P and test-tube Q. Both test-tubes were kept at the same temperature. The number of bubbles produced in test-tube P was 12 bubbles per minute.
What is the most likely number of bubbles produced in one minute in test-tube Q?
516
528
550
The diagram shows a leaf as seen in cross-section under the microscope. What are tissues 1, 2 and 3?
510
540
521
The pie charts show the composition of 100 g of four different foods.
Which food provides the most energy?
582
532
521
The cholera bacterium produces a toxin that results in water entering the alimentary canal and causing diarrhoea.
The diagram shows the human alimentary canal.
Into which region are chloride ions secreted as a result of the toxin?
500
507
556
The diagram shows an experiment kept at room temperature.
What is present in the water surrounding the membrane after 45 minutes?
582
584
514
The diagram shows an experiment to investigate transpiration.
Plant 1 is not covered. Plant 2 and its pot are covered by a transparent plastic bag.
The mass of each plant and its pot is measured. The masses are measured again after two hours.
What is the result?
580
517
561
Which description of translocation is correct?
582
571
524
Which factor increases the risk of developing coronary heart disease?
538
541
505
Which row describes the features of passive immunity?
[Table_1]
525
597
549
The diagram shows part of the human gas exchange system.
Which row identifies P, Q and R?
[Table_1]
522
579
505
What is the effect on germinating seeds of increasing the temperature from 10\(^{\circ}\)C to 20\(^{\circ}\)C?
568
550
591
Lactic acid builds up in the muscles during vigorous exercise. During recovery, how is this lactic acid removed?
598
531
569
Which process transmits an impulse across a synapse?
598
520
588
The diagram shows the muscles that control the size of the pupil in an eye.
How do the muscles make the pupil smaller?
503
538
577
The diagram shows the shoot and root of a seedling responding to gravity.
Which row shows where the auxin accumulates and the effect of this in the shoot?
[Table_1]
570
525
556
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?
592
586
591
Bacteria such as MRSA are resistant to antibiotics.
These processes can occur in bacteria.
1. artificial selection
2. genetic variation
3. mutation
4. natural selection
What would contribute to the development of antibiotic resistance?
528
515
501
In humans, why are sperm cells produced in much greater numbers than egg cells?
542
529
598
There are many reasons why a woman does not become pregnant.
What can be treated by a drug that increases the secretion of FSH?
522
538
546
The diagram shows the cells of a mammalian embryo shortly after fertilisation. Which is the correct description of these cells?
503
567
554
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?
[Table_1]
539
586
526
The diagram shows a genetic cross between a male bird with black feathers and a female bird with white feathers. All of the offspring have blue feathers.
parents \[F^BF^B\] black \(\times\) \[F^WF^W\] white
offspring \[F^BF^W\] 100\% blue
Two of the blue offspring are crossed.
Which row shows the correct phenotype percentages for the cross?
[Table_1]
532
513
576
What is a feature of some xerophytes?
542
507
556
The diagram shows a pyramid of biomass.
Which organisms are found in position X?
507
539
518
The diagram shows part of the nitrogen cycle. At which stage is denitrification occurring?
526
554
541
Which structures found in bacteria make bacteria useful in genetic engineering?
563
570
548
Which chemical reaction is catalysed by maltase?
560
542
557
What are the possible effects of deforestation? [Table_1]
558
589
583
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?
506
556
578
