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Which processes are characteristics of all living organisms?
1. digestion
2. respiration
3. excretion
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Using the binomial system, the Arctic fox is called \textit{Vulpes lagopus}.
Which row is correct?
[Table_1]
555
525
502
Which feature is found in viruses?
591
575
597
Which features are possessed by all plant cells? [Table_1]
521
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527
The length of a bacterium in a diagram is 50 mm. The magnification of the diagram is \times 5000. What is the actual length of the bacterium?
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502
The diagram shows an experiment to investigate osmosis in living cells. What happens to the volumes of water and sugar solution after 12 hours?
517
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585
Which statements about active transport are correct?\n1. It transports particles from a low concentration to a high concentration.\n2. It always transports particles into cells.\n3. It involves protein molecules in the cell membrane.\n4. It uses energy from respiration.
526
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Which row identifies the chemical elements in proteins? [Table_1]
579
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561
The table shows some large biological molecules and some small biological molecules. [Table_1] Which rows correctly pair large molecules with the smaller molecules used to make them?
542
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597
The graph shows the results of an experiment to investigate the rate of respiration in an organism in different environmental temperatures. What explains the increase in the rate of respiration between 10°C and 30°C?
534
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The diagram shows how the rate of photosynthesis varies with light intensity.
The four curves show different conditions of temperature and carbon dioxide concentration.
What limits the rate of photosynthesis at point P?
562
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566
The diagram shows a cell with groups of bacteria around its edge. The bacteria have moved to areas of high oxygen concentration. Which process in the cell causes the bacteria to form these groups?
503
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The diagram shows the teeth in the lower jaw of a human. Which tooth is a premolar?
534
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534
Some medicines are made into tablets which are coated in a starch-like substance. The coating protects the medicine from the effects of gastric juice. Which enzyme digests the coating and what is produced by this action? [Table_1]
534
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528
The diagram shows a villus. The arrows show the direction of flow within vessels associated with the villus.
Which vessel carries blood to the liver?
578
536
507
From which part of a leaf does most water evaporate during transpiration?
589
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The photograph shows a cross-section through a sunflower stem.
What is the name and function of the tissue labelled Z?
554
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The photomicrograph shows some blood cells.
What is the function of cell P?
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The diagram shows the blood vessels associated with the liver.
What are the blood vessels labelled X, Y and Z?
555
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592
When a pathogen enters the blood, the immune system uses different mechanisms to destroy the pathogen. The diagram shows one of these mechanisms. Which row describes the structures involved? [Table_1]
581
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595
What is the composition of expired air compared with inspired air?
[Table_1]
567
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534
During exercise, receptors detect a change in the blood and cause the breathing rate to increase.
Which change do the receptors detect and where are they found in the body?
[Table_1]
586
513
514
Yeast cells can convert glucose into alcohol and carbon dioxide. Which statement about this process is correct?
516
504
535
What is the correct balanced equation for one type of respiration?
533
567
545
Which row shows an organ and the substance it excretes? [Table_1]
528
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588
The diagram shows a reflex arc in a human nervous system. The person’s finger has just made contact with a sharp object.
Which part is the motor neurone?
545
563
597
Which hormones can increase blood glucose concentration?
535
559
524
What is defined as a substance that is taken into the body and modifies or affects chemical reactions in the body?
563
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500
What is a disadvantage of sexual reproduction for a population in the wild?
512
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582
Pollen grains from a plant were placed onto the stigma of a flower of the same plant. The lengths of the pollen tubes were measured for four hours. (The mean length of the style in this species of plant is 2 mm.) This was repeated using pollen from a different plant. The results are shown. Which statements are correct? 1. Self-pollination does \textit{not} lead to fertilisation. 2. The difference in growth of the two types of pollen is an adaptation to increase variation. 3. The pollen tubes from a different plant grew fastest between 2.0 hours and 4.0 hours.
599
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Which hormones are released by the placenta during pregnancy?
503
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559
Why are cells in the pancreas the only body cells that produce insulin?
505
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Which statement is correct?
578
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508
What are sources of genetic variation in populations?
1. meiosis
2. random mating
3. random fertilisation
582
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563
Which row shows features of xerophytes that reduce water loss? [Table_1] key ✓ = reduces water loss ✗ = does not reduce water loss
574
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The diagram shows a food chain. tree \rightarrow insect \rightarrow blue tit \rightarrow hawk Which statement about a pyramid based on this food chain is correct?
552
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511
During the nitrogen cycle, which process releases nitrogen gas into the air?
593
570
538
Red-green colour blindness is a sex-linked characteristic caused by a recessive allele. Which prediction can be made about the children of a woman who is colour-blind and a man with normal vision?
547
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547
One method of conserving fish stocks is to have a minimum mesh size for fishing nets.
How is the mesh size chosen to conserve a particular fish species?
558
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The diagram shows how a human gene can be inserted into a bacterium. Which row shows the correct processes at 1, 2, 3 and 4?
556
521
515
