Quiz 1
1. Enzyme 2. Cell transport 3. Cell structure 4. Food 5. Respiration
Enzyme You have to answer 15 questions. If your answer is correct, you will have one mark. If your answer is incorrect, you will lose one mark.
You have to answer 15 questions. If your answer is correct, you will have one mark. If your answer is incorrect, you will lose one mark.
Note! You can only choose one answer! Do not click the second button after you have clicked the first one, or you will get inaccurate marks.
Wish you good luck!!!!!
Question1 All enzymes are proteins. True False Question 2 Enzymes work by speeding up chemical reactions. True False Question 3 The surface of the enzyme molecule where the substrate can combine is called an active site. True False Question 4 Enzymes can only work in the living body. True False Question 5 When an enzyme reacts with a substrate, a enzyme-substrate complex is formed. True False Question 6 Enzyme-substrate complex is an unstable structure. It can be broken down easily. True False Question 7 Enzymes work best at optimal pH and optimal temperature. True False Question 8 Enzyme activity can be affected by both substrate concentration and enzyme concentration. True False Question 9 Enzyme activity increases with temperature. When temperature increases, enzyme works faster. True False Question 10 Rate of enzyme action can be calculated by the reciprocal of the time of disappearance of the substrate. True False Question 11 The name of most enzymes ends with the suffix -ose. True False Question 12 Enzymes may die when they are denatured by extreme acidity such as pH=1. True False Question 13 Enzyme is so specific that it can act on only one type of substrate. True False Question 14 Amylase is an enzyme which digest starch into glucose. True False Question 15 Denatured protein is easier to be digested than non-denatured one so it is more difficult to digest raw eggs than boiled eggs. True False Click here to play again
Click here to play again
Note! You can only choose one answer! DO NOT choose two, or you will get inaccurate marks.
Cell structure You have to answer 15 questions. If your answer is correct, you will have one mark. If your answer is incorrect, you will lose one mark.
Question 1 Protoplasm is cytoplasm. True False Question 2 All plant cells have cell wall. True False Question 3 Cell wall is hard and it can prevent the plant cell from changing shape. True False Question 4 Cell membrane is mainly composed of proteins and lipids. True False Question 5 Vacuole is a living part in a cell whereas the cell sap is non-lving. True False Question 6 Nucelus can control cellular activities because it has chromosomes. True False Question 7 All respiratory reactions take place in mitochondria. True False Question 8 Chloroplasts contains chlorophyll and they can carry out photosynthesis . True False Question 9 Cell membrane is selectively permeable but cell wall is fully permeable. True False Question 10 Chromosomes cannot be seen in a normal non-dividing cell. True False Question 11 Plant cells store starch in form of carbohydrates but animal cells store glycogen instead. True False Question 12 Cell wall is very rigid because of the presence of cellulose fibres. True False Question 13 The structural and functional units of sub-cellular structures in a cell are called organelles. True False Question 14 All living cells have nucleus. True False Question 15 All plant cells have chloroplasts. True False Click here to play again
Food You have to answer 15 questions. If your answer is correct, you will have one mark. If your answer is incorrect, you will lose one mark. Note! You can only choose one answer! Do not click the second button after you have clicked the first one, or you will get inaccurate marks. Wish you good luck!!!!!
Question 1 Benedict's solution is a reagent to test for all sugars. True False Question 2 The positive result of Benedict's test is that there is a colour change from blue to brown or red or orange or yellow or green. True False Question 3 Cellulose is a non-digestible food. It cannot provide enegy. True False Question 4 Food provides energy life. Without energy, enzyme production will stop. True False Question 5 Examples of polysaccharides are starch, glycogen and cellulose. True False Question 6 In our body, excess glucose can be changed to glycogen or starch or fat for storage. True False Question 7 Non-essential amino acids are less essential than essential amino acids because they can be made in our body. True False Question 8 To test protein, sodium hydroxide solution is added to the solution first. And then, copper sulphate solution is added drop by drop. True False Question 9 To test vitamin C, we add DCPIP solution and mix it by shaking it from time to time. True False Question 10 Cholesterol is a kind of fats. True False Question 11 Excess saturated fat do more harm to our body then excess unsaturated fat. True False Question 12 The energy value of a food is only determined by the heat energy released from it. True False Question 13 Vitamin A,D,E,K are fat-soluble. True False Question 14 The only requirement of a balanced diet is a diet that contains all kinds of food . True False Question 15 A normal girl of age 18 requires more iron minerals than a girl of age of 10. True False Click here to play again
Respiration You have to answer 15 questions. If your answer is correct, you will have one mark. If your answer is incorrect, you will lose one mark. Note! You can only choose one answer! Do not click the second button after you have clicked the first one, or you will get inaccurate marks. Wish you good luck!!!!!
Question 1 Respiration must take place inside a living cell. True False Question 2 All kinds of respiration involve oxidation of food. True False Question 3 ATP is a kind of chemical energy usable by cells. True False Question 4 The amount of ATP produced in aerobic respiration must always be more than that produced in anaerobic respiration. True False Question 5 All respiratory reactions take place in mitochondria. True False Question 6 Different types of organisms may have different types of ATP. True False Question 7 When temperature of the cell increases from 10 degree Celsius to 30 degree Celsius, respiratory rate increases. True False Question 8 By means of respiration, a living cell can produce energy for its use. True False Question 9 Fermentation means anaerobic metabolic reactions in cells. True False Question 10 Some muscle cells in human body can carry out anaerobic respiration when oxygen supply is reduced. True False Question 11 When yeasts are added to dilute sucrose solution, the cells can secrete enzymes to digest the sucrose into glucose and fructose. The simple sugars are absorbed and used in aerobic respiration. True False Question 12 Soya bean sauce, yogurt, wine are products of fermentation by micro-organisms. True False Question 13 The extra amount of oxygen taken in after exercise is called the oxygen debt. True False Question 14 Chemical energy stored in food cannot be used directly in cells. Respiration must be needed to release the chemical energy in it. True False Question 15 When an animal cell carry out anaerobic respiration, usually lactic acid and carbon dioxide can be produced. True False Click here to play again
