SL Topic B1.1 Carbohydrates and lipids

1#

第 1 题组 (共 4 题 4 分)

1. Carbon is the basis of biological polymer re/x:u67mwsl s because:
I It can form chains by bonding to other carbon atoms.
II It is found in carbohydrates.
III It can form four covalent bonds.
IV It can form branched and ring structures.

A. I only

B. I and II only

C. I, III and IV only

D. I and III only

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2#

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2. Which of the following is the best description of tj vgpn .qfpv002g 1b0rhe formation of a triglyceri0qp.f vr2 n010vg jgpbde from glycerol
and 3 fatty acids?

A. Hydrolysis

B. Condensation.

C. Lysis.

D. Catabolism.

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3#

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3. Which type of structure apjsfhhb1n: 2 7re the ABO antigens that define human blood groups?

A. Glycoprotein.

B. Phospholipid.

C. Fatty acid.

D. Glycophosphate.

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4#

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4. Which of the following terms would be appropriate in describing th s4m.mx 3q)here molecule x3.sqhmmr e4) illustrated?
I. Hexose.
II. Polysaccharide.
III. Glucose.
IV. Pentose.

A. All of the above.

B. I and III only.

C. III and IV only.

D. I, II and III only.

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5#

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第 2 题组 (共 6 题 6 分) 当前第1/6题

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5. The chart and graph below show the results of an experiment where carbon dioxide evolution of a suspension of Brewer’s yeast (Saccharomyces cerevisiae) was measured. The yeast was grown several times, using different carbohydrate sources.
• 1g of the yeast was placed in a conical flask and
• 50cm3 of a 1% solution of the carbohydrate solution was added.
• The flask was fitted to a gas syringe to collect the carbon dioxide produced.

a. Suggest one variable that should be/ys hk.djs91bk 8w) lno+5 jdu controlled other than those given in the questionj9ynudsh+ w /o1 s 5d.)lkj8bk.

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6#

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第 2 题组 (共 6 题 6 分) 当前第2/6题

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5. The chart and graph below show the results of an experiment where carbon dioxide evolution of a suspension of Brewer’s yeast (Saccharomyces cerevisiae) was measured. The yeast was grown several times, using different carbohydrate sources.
• 1g of the yeast was placed in a conical flask and
• 50cm3 of a 1% solution of the carbohydrate solution was added.
• The flask was fitted to a gas syringe to collect the carbon dioxide produced.

b. What types of carbohydrate we0le ( yq0p47co: p0q9j/holb+ssm c gcre used as the nutrient source?

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7#

问答题 ( 1.0 分) (组内3/6) 切至整卷模式搜藏此题

第 2 题组 (共 6 题 6 分) 当前第3/6题

题组内容描述:
5. The chart and graph below show the results of an experiment where carbon dioxide evolution of a suspension of Brewer’s yeast (Saccharomyces cerevisiae) was measured. The yeast was grown several times, using different carbohydrate sources.
• 1g of the yeast was placed in a conical flask and
• 50cm3 of a 1% solution of the carbohydrate solution was added.
• The flask was fitted to a gas syringe to collect the carbon dioxide produced.

c. Explain the shape of the curvr h5) q1:fdnqr(gef n9e for the use of glucose as a respiratory substraten fnrr5 q d):eh9(1fgq.

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8#

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第 2 题组 (共 6 题 6 分) 当前第4/6题

题组内容描述:
5. The chart and graph below show the results of an experiment where carbon dioxide evolution of a suspension of Brewer’s yeast (Saccharomyces cerevisiae) was measured. The yeast was grown several times, using different carbohydrate sources.
• 1g of the yeast was placed in a conical flask and
• 50cm3 of a 1% solution of the carbohydrate solution was added.
• The flask was fitted to a gas syringe to collect the carbon dioxide produced.

d. Describe the differences between the resukt16 ewnp*cg*mi)i,p lts for glucose and starch.

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9#

问答题 ( 1.0 分) (组内5/6) 切至整卷模式搜藏此题

第 2 题组 (共 6 题 6 分) 当前第5/6题

题组内容描述:
5. The chart and graph below show the results of an experiment where carbon dioxide evolution of a suspension of Brewer’s yeast (Saccharomyces cerevisiae) was measured. The yeast was grown several times, using different carbohydrate sources.
• 1g of the yeast was placed in a conical flask and
• 50cm3 of a 1% solution of the carbohydrate solution was added.
• The flask was fitted to a gas syringe to collect the carbon dioxide produced.

e. After 60 minutes yeast produced 44 cm3 of CO2. Wha/3r t w7dpy atl/2hf:dt percentage of this volume did the yey 7: td3lw2/ap/rdhftast produce after 60 minutes using sucrose? (Show your working)

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10#

问答题 ( 1.0 分) (组内6/6) 切至整卷模式搜藏此题

第 2 题组 (共 6 题 6 分) 当前第6/6题

题组内容描述:
5. The chart and graph below show the results of an experiment where carbon dioxide evolution of a suspension of Brewer’s yeast (Saccharomyces cerevisiae) was measured. The yeast was grown several times, using different carbohydrate sources.
• 1g of the yeast was placed in a conical flask and
• 50cm3 of a 1% solution of the carbohydrate solution was added.
• The flask was fitted to a gas syringe to collect the carbon dioxide produced.

f. Which trial was a con5+/dc 0mz yk/3holydq 3nl- amw7h0zi qvm i*:trol experiment and why was it necessary?

该题自我估分: (必填) (满分:1.0分)

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11#

问答题 ( 1.0 分) (组内1/2) 切至整卷模式搜藏此题

第 3 题组 (共 2 题 2 分)

6. Compare and contrast the use of lipids and carbohydradg 3al,c;/ zjftes as energy storing materials in plants and animaldjf,3/;g lc azs.

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12#

问答题 ( 1.0 分) (组内2/2) 切至整卷模式搜藏此题

7. Outline the differences between the structure of dwy9 kw4e:m 4rqf)w-o saturated, monounsaturated akqdeo9w ym4w w:-4fr)ndpolyunsaturated fatty acids?

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