1.やさしい
Which protein gives strength to skin, tendons and bone?
- AMyosin
- BAmylase
- CCollagen
- DHaemoglobin
2.やさしい
Which molecules, made by immune cells, bind to specific antigens?
- APhospholipids
- BHormones
- CAntibodies
- DEnzymes
3.やさしい
What are round (spherical) bacteria called?
- ASpirilla
- BVibrios
- CBacilli
- DCocci
4.ふつう
In a food chain, which organisms are the producers?
- APredators at the top of the chain
- BFungi that break down dead material
- CPlants and algae that make food by photosynthesis
- DAnimals that eat only plants, such as rabbits and deer
5.ふつう
What is an inversion mutation?
- AA segment of a chromosome is lost completely
- BA chromosome segment breaks off and is reattached the wrong way round
- CA whole extra chromosome is added to the cell
- DA segment of a chromosome moves to a different, non-matching chromosome
6.ふつう
A woman with blood type O has a child with a man of type AB. Which blood types can their children have?
- AA, B, AB or O
- BO or AB
- CA or B
- DO only
7.むずかしい
A patient breathes very slowly, so carbon dioxide builds up in the blood. What happens to the blood pH, and why?
- AIt falls, because CO₂ forms carbonic acid in the blood
- BIt stays the same, because CO₂ does not dissolve in blood
- CIt rises, because CO₂ is a base
- DIt rises, because CO₂ removes hydrogen ions
8.むずかしい
A patient with type A blood is given type B red blood cells by mistake. What is the cause of the reaction that follows?
- AThe patient's A antigens dissolve the donor's haemoglobin
- BAnti-B antibodies in the patient's plasma attack the donor cells
- CThe donor's B antigens destroy the patient's white blood cells
- DAnti-A antibodies on the donor cells attack the patient's plasma
解答
- 1. C · Collagen
- 2. C · Antibodies
- 3. D · Cocci
- 4. C · Plants and algae that make food by photosynthesis
- 5. B · A chromosome segment breaks off and is reattached the wrong way round
- 6. C · A or B
- 7. A · It falls, because CO₂ forms carbonic acid in the blood
- 8. B · Anti-B antibodies in the patient's plasma attack the donor cells
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