SPM Biology 2013

Question

1 . Diagram 1.1 shows the formation of triglyceride.
Rajah 1.1 menunjukkan pembentukan trigliserida.

(a)(i) Name P and Q.

Namakan P dan Q.

(ii) In Table 1, state the number of molecules for P and Q.

Dalam Jadual 1, nyatakan bilangan molekul bagi P dan Q.

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(b)(i) Name process X.

Namakan proses X.

(ii) Explain process X.

Terangkan proses X.

 

(c) Triglyceride is a type of lipid. State one function of triglyceride in human.

Trigliserida adalah sejenis lipid. Nyatakan satu fungsi trigliserida dalam manusia.

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(d) Diagram 1.2 shows a cross-section of an artery in an individual who practices an unhealthy eating habit. Explain the effect of the unhealthy eating habit to his health.

Rajah 1.2 menunjukkan satu keratan rentas arteri seorang individu yang mengamalkan tabiat pemakanan yang tidak sihat. Terangkan kesan tabiat pemakanan yang tidak sihat terhadap kesihatannya.

 

(e) Suggest one practice to avoid the formation of S deposit in the artery.

Cadangkan satu amalan untuk mengelakkan pembentukan enapan S dalam arteri.Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

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Answer ( 1 )

    1
    2021-02-24T20:26:22+08:00
    This answer is edited.

    1.a)i) P: glycerol

    Q: fatty acid

    ii)P: 1

    Q: 3

     

    b)i)X is condensation.

    ii)-1 molecule of glycerol combines with 3 molecules of fatty acids to form 1 molecule of triglyceride via a condensation process.

    3 molecules of water are removed during this process.

     

    c)Triglycerides are an important energy source. 

     

    d)Effect: The lumen of the artery is narrowed and this may cause high blood pressure.

    Explanation: -A high cholesterol diet causes the formation of plaques to occur.

    -Plaque deposits around the lumen and impedes blood flow causing high blood pressure.

     

    e)Reduce the intake of fatty and high cholesterol food.

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