Test
Enzymes
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Preguntas del test (15)
1Protein molecules are made of long chains of amino acids, which are folded up to produce specific shapes.The shape of a protein depends on its function. Proteins have many different functions. Tick the box below which is not a function of a protein.
- Astructural components of tissues, such as muscle
- Bhormones
- Cantigens
- Dantiodies
- Ecatalysts
2Enzymes are carbohydrates which act as biological catalysts.
- AVerdadero
- BFalso
3Enzymes are large proteins and the shape of the enzyme is vital for its function. This shape has an area where other molecules can fit - the '__________ site'. Tick the correct box to fill in the gap.
- Ainactive
- Bactive
- Creaction
4The substrate in a reaction can be held in the active site and can be connected to another molecule or be broken down.
- AVerdadero
- BFalso
5Enzymes can:
- Build large molecules from many smaller ones e.g. building [blank_start]starch[blank_end] from glucose molecules
- Change one molecule into another e.g. convert one type of sugar into another one
- [blank_start]Break down[blank_end] large molecules into smaller ones e.g. all the digestive enzymes do this- Aprotein
- Bstarch
- Cfats
- DBreak down
- EBuild up
6If the temperature in a reaction using enzymes gets too high (above [blank_start]45[blank_end] degrees Celsius), the enzymes stop working because the active site changes [blank_start]shape[blank_end]. We say the that the enzyme has [blank_start]denatured[blank_end].
- A45
- B37
- Ccolour
- Dshape
- Edenatured
- Fdied
7Each enzyme works best at a particular pH value.
- AVerdadero
- BFalso
8Some enzymes work outside the body cells. Digestive enzymes are produced by specialised cells in [blank_start]glands[blank_end] and in the lining of the gut. The enzymes work outside of the body cells, so they can come into contact with the food. [blank_start]Digestion[blank_end] involves the breakdown of large, [blank_start]insoluble[blank_end] molecules into smaller soluble molecules.
- Aglands
- BDigestion
- Cinsoluble
9Amylase catalyses the digestion of starch into sugars in the mouth and small intestine. Amylase is produced by which of these options? Tick one box.
- Athe pancreas and small intestine
- Bsalivary glands, the pancreas and the small intestine
- Cthe stomach, the pancreas and the small intestine
10lipase catalyses the breakdown of lipids (fats and oils) into fatty acids and glycogen.
- AVerdadero
- BFalso
11Bile is produced by the liver and can both neutralise stomach acid, when it is squirted into the small intestine, as well as emulsify fats, making them easier to digest.
- AVerdadero
- BFalso
12Biological detergents contain proteases and lipases that digest food stains. They work at higher temperatures than ordinary washing powders.
- AVerdadero
- BFalso
13Proteases are used to pre-digest proteins in baby food
- AVerdadero
- BFalso
14[blank_start]Isomerase[blank_end] is used to convert glucose syrup into [blank_start]fructose[blank_end] syrup. This is much [blank_start]sweeter[blank_end], so less is needed in foods. Therefore it is used in many slimming products.
- AIsomerase
- Bsweeter
- Cfructose
15Which of the following is not an advantage of using enzymes in industry and in the home.
- AThey are very effective at removing stains such as blood, grass and gravy
- BThey can be used at lower temperatures.
- CSome fabrics, such as wool, will be digested by proteases.
Información
- Descripción
- GCSE (B2) Biology Test sobre Enzymes, creado por Elliemd el 15/03/2016.
- Autor
- Elliemd
- Idioma
- English
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- 0
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