SL Topic B1.1 Carbohydrates and lipids

1#

第 1 题组 (共 4 题 4 分)

1. Carbon is the basis of bioikxyc(/qb (z: logical polymers 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 t g9 ,dgmj2dfs-he best description of the formation of a triglyceride from glycerd9gjs m,2f-gdol
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 are the ABO antvu9tvtg5 5ov9 igens 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 the mol4t(cnb 6aidk 9yoyl/+eflx29ecule ilko xyldiy l(b9c6 f/nt2a+94elustrated?
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 controlled other than those given in the hw9 m7m 1sisbt6 q u4m6r**ymaquestiomm9s*t s irm*71m 6 qhb64wayun.

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6#

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第 2 题组 (共 6 题 6 分) 当前第2/6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.

b. What types of carbohydrate were used as the nutrientv/ ir7vq8tmmy6:g i t; source?

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7#

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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 curve for the use of4;0y ntn elaw* glucose as a respiratory substra4;0*l ety nwnate.

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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 betwue e3x6 j epxs)-npegi-z1) y(een the results 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 cm, qe- ruahp, hqu: .fno7t*x(ft-e 4lz3 of CO2. What percentage of this volume did the yeastunqah: -lpo he u-,r7 q4ztf *tef(,x. 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 control experiment and why was it necessary? u7q6v7lh hog)

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11#

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第 3 题组 (共 2 题 2 分)

6. Compare and contrast the use of lipids and carbohydrates as energy storin nggrk;yd03r 1g materials1r;gygn k r30d in plants and animals.

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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 saturate/);g5m sfekvnx*m) v 9g)hjq(pyau 8xd, monounsaturated andpolh g5vna)usqx9y/v;gmfm8xe) ( p )*k jyunsaturated fatty acids?

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