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All living organisms release energy from nutrient molecules within their cells.
What is the name of this characteristic?
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Which diagram shows a flower from a monocotyledon?
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The diagram shows a cross-section through two guard cells of a leaf. Which labelled structures would also be found in an animal cell?
505
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The diagram shows a cross-section through a leaf. Which label shows a tissue?
526
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510
Which statement describes the net movement of particles during diffusion?
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516
The diagram shows a section through a mesophyll cell of a leaf.
Which part is partially permeable?
532
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522
What are the smaller basic units of starch and glycogen molecules?
[Table_1]
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In a length of DNA, 20% of the bases were T. What is the percentage of base G in this length of DNA?
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600
Some terms used to describe enzyme-controlled reactions are listed.
1. catalyst
2. product
3. protein
4. substrate
Which terms describe an enzyme?
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Which statement describes the effect of temperature on enzymes?
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Tomato fruit production was measured in five different environmental conditions.
What is a correct conclusion for the data shown in the graph?
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584
How do the air spaces in the spongy mesophyll of a leaf help to adapt it for photosynthesis?
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568
What is the dietary importance of fibre in humans?
588
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In which part of the alimentary canal does ingestion take place?
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A non-woody plant stem is placed in water containing a red dye. It is left for one day and then a section of the stem is examined using a microscope.
Which tissue is stained red?
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The diagram shows a cross-section through a leaf. From which cell will most water evaporate during transpiration?
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The diagram shows the circulatory system of a fish.
Where in the circulatory system is the oxygen concentration lowest?
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What is a function of the lymphatic system?
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The graph shows the response of the body to vaccination.
Which word should be used to replace the letter X, to complete the label on the y-axis?
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562
Which row shows a change that occurs during ventilation?
566
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What is the balanced chemical equation for anaerobic respiration in yeast?
531
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Which statement correctly explains the difference in glucose concentration in the kidney tubule between X and Y?
585
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520
Where in the eye is the greatest concentration of cells that allow humans to see colour?
536
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A scientist investigated the effect of drinking iced water on skin temperature. They drank a large volume of iced water and monitored the temperature of their skin.
The results are shown on the graph.
Which explanation of the change in skin temperature during the first 10 minutes is correct?
587
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551
An experiment was set up to investigate the growth of shoots in different conditions, as shown:
Which diagram shows the results that would be seen a few days later?
535
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An advisor was presented with a list of statements for a discussion group with potential parents who were considering using in vitro fertilisation (IVF) to start a family.
Which statements about IVF are correct?
1. IVF is available to everyone.
2. IVF is 100% successful and therefore always leads to pregnancy.
3. IVF provides an opportunity for single parents to have a family.
4. IVF is not expensive and everyone can afford it.
5. Sperm or egg donation may be involved which means the couple are not always the biological parents.
509
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Which sequence of structures does a pollen tube grow through in a flower?
537
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The diagram shows some of the events of the menstrual cycle.
In which shaded zone of the cycle would progesterone levels be the highest?
520
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What is needed in the cytoplasm to make proteins at a ribosome?
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569
Pangolins are mammals. One species of pangolin has 40 chromosomes per body cell. How many chromosomes will a sperm cell from this species of pangolin have?
546
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537
Which adaptation is shown in the leaves of hydrophytes?
525
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597
Sickle cell anaemia is a genetic disorder which results in severe illness in homozygous individuals. In some human populations, being heterozygous can be beneficial.
What could be the reason for this?
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570
Which statement about selective breeding is correct?
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The diagram shows the water cycle. Four different processes are numbered.
Which row identifies the processes correctly?
516
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A herd of red deer live in a forest that contains snakes and a large variety of birds. Which group of organisms is an example of a population?
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546
With which kingdoms do bacteria share the same genetic code?
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525
Which process makes use of a genetically engineered organism?
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What is a reason for conserving plant species?
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588
The food web shows the feeding relationships in a woodland.
If all the chaffinches in the food web die, which effect would this have?
570
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538
