SMK AMINUDDIN BAKI, CHEMOR , PERAKMID-YEAR EXAMINATION

BIOLOGY-PAPER 2(2 HOURS)

Name:Form : 4 Date : ___/ ___/ ___

Instruction: Answer ALL questions.

SECTION A ( 50 Marks)- STRUCTURE

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[ Rajah 1]

An experiment on reaction of enzyme X on substrate at different temperature was conducted and the result is shown in Figure 1. Study the graph carefully and answer the following questions.

[Satu eksperimen mengenai tindakbalas enzim X ke atas substrat pada suhu yang berlainan telah dikaji dan keputusannya ditunjukkan dalam Rajah1. Kaji graf dengan teliti dan kemudian jawab soalan-soalan berikut]

(a) Based on the graph, state the time taken for each of the curve to become constant at these temperatures: [3 M]

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[ Berdasarkan graf, nyatakan masa yang diambil untuk setiap garis lenkung menjadi malar pada suhu berikut :(i) 25 C : _____________ (ii) 37 C: ______________ (iii) 60 C: _______________

(b)(i) State the best temperature for the reaction of enzyme X with the substrate. [1 M] [Nytakan suhu yang paling sesuai untuk tindakan enzim X dengan substrat.]____________________________________________________________________________

(ii) Give a reason for your answer in (b)(i) [1 M] [Berikan sebab bagi jawapan anda di (b)(i).]_____________________________________________________________________________

(c) Give a reason why the curves labeled 25 C and 37 C become constant at the same level. [1 M] [Berikan satu sebab mengapa garis lengkung berlabel 25 C dan 37 C

menjadi malar pada paras yang sama].______________________________________________________________________________

(d) Give a reason why the curve labeled 60 C is constant at a lower level compared to the curves labeled 25 C and 37 C. [2 M]

[ Berikan satu sebab mengapa lengkung yang berlabel 60 C menjadi

malar pada paras yang lebih rendah berbanding lengkung berlabel 25 C dan 37 C.]

_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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(e) Name an enzyme that is involved in the digestion of the following substrates: [3 M] [Namakan satu enzim yang terlibat dalam pencernaan substrat berikut :]

(i) Starch / Kanji : ___________________ (ii) Fat / Lemak : ___________________

(iii) Protein : _______________________

(f) Name the products formed after the digestion of the following substrates. [3 M] [ Namakan produk yang terhasil selepas pencernaan substrat berikut:]

(i) Starch / Kanji : ___________________ (ii) Fat / Lemak : ___________________

(iii) Protein : _______________________2.

K L

M N

Diagram 2 [Rajah 2]

Diagram 2 shows an Amoeba sp .[ Rajah 2 menunjukkan seekor Amoeba sp] .

(a)(i) Name structure labeled K. [1 M] [[Namakan struktur berlabel K.]______________________________________________________________________________

(ii) Explain how K is involved in the Amoeba’s “eating” process. [3 M] [Huraikan bagaimana K terlibat dalam proses pemakanan Amoeba]______________________________________________________________________________________________________________________________________________________________________________

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__________________________________________________________________________________________________________________________________________

(b)(i) What is the main problem faced by Amoeba that lives in fresh water? [2 M] [ Apakah masalah utama yang dihadapi oleh Amoeba yang hidup di air tawar?]________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(ii) Which labeled part that helps the Amoeba to overcome the problem stated in (b)(i)? [1 M] [Bahagian berlabel manakah yang menolong Amoeba mengatasi masalah yang dinyatakan dalam (b)(i)?]_____________________________________________________________________________

(iii) Explain how the part that you named in (b)(ii) helps to overcome the problem. [2 M] [ Terangkan bagaimana bahagian yang anda namakan di (b)(ii) menolong mengatasi masalah tersebut.]__________________________________________________________________________________________________________________________________________________________

(c) Name the type of reproduction done by Amoeba in these conditions : [2 M] [Namakan jenis pembiakan yang dijalankan oleh Amoeba dalam keadaan berikut:] (i) Suitable / sesuai : _____________________________ (ii) Unsuitable / tidak sesuai : ________________________

(d) Amoeba and Paramecium are unicellular organism. Give two reasons, why Paramecium is

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more advanced then Amoeba. [2 M] [Amoeba dan Paramecium adalah organism unisel. Berikan dua sebab kenapa Paramecium lebih maju daripada Amoeba](i) __________________________________________________________________________ ___________________________________________________________________________

(ii) __________________________________________________________________________ ___________________________________________________________________________

3.

Diagram 3 shows how a triglyceride is formed. [Rajah 3 menunjukkan bagaimana trigliserida terbentuk]

(a)How many molecules of glycerol and fatty acids are needed to form one

molecule of triglyceride? [2 M][Berapakah bilangan molekul gliserol dan asid lemak yang diperlukan untuk membentuk satu molekul trigliserida?]

(i) Glycerol/ [Gliserol] : _____________________

(ii) Faty acid / [asid lemak] : _______________________

(b)(i) What is process M which takes place to form the bond between glycerol and fatty acids? [1 M]

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[Apakah proses M yang berlaku untuk membentuk ikatan antara gliserol dan asid lemak?] _______________________________________________________________________

(iii) What is P that is also formed from this reaction? [1 M][Apakah P yang juga terbentuk daripada tindak balas ini?]______________________________________________________________________

(c) A triglyceride molecule can be converted to glycerol and fatty acids through hydrolysis. Explain what is meant by ‘hydrolysis”. [2 M]

[Molekul trigliserida boleh ditukarkan kepada gliserol dan asid lemak melalui hidrolisis. Terangkan apakah maksud “hidrolisis’.]__________________________________________________________________________________________________________________________________________________

(d) Wax is a type of lipid. Name types of waxes found in plants and animals. [ 2 M] [Lilin merupakan sejenis lipid. Namakan jenis lilin yang dijumpai pada tumbuhan dan haiwan]

(i) _____________________________ (ii) _____________________________

(e) Steroid is a type of lipid. Tick ( √ ) three types of steroids in the space provided below. [3 M] [Steroid ialah sejenis lipid. Tandakan ( √ ) tiga jenis steroid dalam ruangan yang disediakan di bawah]

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4.

Diagram 4 shows an experiment to study osmosis.[Rajah 4 menunjukkan eksperimen untuk mengkaji osmosis.]

(a) Name the apparatus shown above. [1 M] [Namakan radas yang ditunjukkan di atas.]_____________________________________________________________________________

(b) What is the observation expected on the level of sucrose solution in the capillary tube? [1 M] [Apakah pemerhatian yang dijangka pada aras larutan sukrosa dalam tiub kapilari?]

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Types of steroids / [Jenis steroid]

( √ )

Cholesterol [kolesterol]Progesterone [Progesteron]Phospholipid [Fosfolipid]Oil [Minyak]Fat [Lemak]Testosterone [Testosteron]

_____________________________________________________________________________

(c)(i) Name the molecules that continuously colliding on both sides of Visking tubing. [1 M] [Namakan molekul yang sentiasa melanggar kedua-dua belah tiub Visking.]____________________________________________________________________________

(d) Visking tubing is a semi permeable membrane. What is the characteristic of a semi permeable membrane? [ 1 M] [Tiub Visking bersifat separa telap. Apakah sifat membrane separa telap?]____________________________________________________________________________

(e) Explain the result of this experiment. [3 M] [Terangkan keputusan eksperimen ini.]___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

(f)(i) Will the level of the solution in the capillary tube increase continuously? [1 M] [Adakah paras larutan dalam tiub kapilari akan terus meningkat?]_____________________________________________________________________________

(ii) Explain your answer in (f)(i). [4 M] [Terangkan jawapan anda di (f)(i)]_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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SECTION B ( 20 Marks)- ESSAY

A plant cell is observed under an electron microscope.[ Satu sel tumbuhan telah dikaji di bawah mikroskop electron.]

(a)Draw a plant cell and label all its part clearly. [5 M][Lukiskan satu sel tumbuhan dan labelkan kesemua bahagian-bahagiannya dengan jelas.]

(b)Explain the structure and functions of any five organelles found in a plant cell. [10 M][Terangkan struktur dan fungsi mana-mana lima organel yang terdapat dalam satu sel tumbuhan.]

(c) Discuss the differences between a plant and an animal cell. [5 M][Bincangkan perbezaan antara satu sel tumbuhan dan satu sel haiwan.]___________________________________________________________________

Fun Facts About Animals……..

1. Owls are the only bird that can see the color blue.2. Crocodiles are color-blind.3. . An ant can lift fifty times of its own weight.4. A tarantula can survive for more than two years without food.5. The tongues of chameleons are as long as it’s body or even longer.6. Giraffes have no vocal chords.7. Flies have five eyes. They have two large eyes and three smaller eyes

between them.8. Dolphins sleep with one eye open.

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Prepared by : _________________ Checked by : __________________ Mr. Suresh Kumar Joseph Pn. Latipah Omar Biology Teacher Head of Science and Maths Department

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