SULIT

4551
Section A
( 50 marks )
Answer all questions

1

Which of the following is the correct sequence of stages for m...
SULIT
6

4551
The DIAGRAM 1 below shows cell M and cell N. In which direction will water
move between cell M and cell N?

...
SULIT
9

4551
DIAGRAM 3 shows one of the four levels in protein structures

DIAGRAM 3
The level and example for such prote...
SULIT
12

4551
The DIAGRAM 5 shows the structure of a nucleotide.

DIAGRAM 5
What are represented by the units labelled as...
SULIT
16

4551
The graph shows the effect of pH on the rate of reaction of enzyme X.

Enzyme X is
A
lactase.
C
trypsin.

B...
SULIT

4551

A

C

19

B

D

The DIAGRAM 6 shows a graph of rate of reaction against substrate
concentration of an enzyme-...
SULIT

4551

C

20

D

Groundnuts contain a nutrient which is broken down by lipase during
germination. Which test would d...
SULIT
21

4551
The DIAGRAM 7 below shows diffusion through a semi-permeable membrane.

DIAGRAM 7
What are P and Q?
P
Disti...
SULIT

4551

C

25

D

If an animal cell is placed into a solution whose concentration of dissolved
substances is higher t...
SULIT

4551

Section B
( 30 marks )
Answer all questions
1

The DIAGRAM 8 below shows the model of a plasma membrane.

(a)...
SULIT

4551

(d) What is the function of structure Q in plasma membrane?
_________________________________________________...
SULIT

4551

_______________________________________________________________
_____________________________________________...
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1: _____________________________________________________________
2: __________________________________________...
SULIT

4551
hydrophilic head and hydrophobic tail.
[1 mark]

(d) Maintain the fluidity of plasma membrane
2

[1 mark]
[1 m...
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Biologi f4

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Biologi f4

  1. 1. SULIT 4551 Section A ( 50 marks ) Answer all questions 1 Which of the following is the correct sequence of stages for mitosis? A Metaphase → telophase → anaphase → prophase B Anaphase → prophase → metaphase → telophase C Prophase → anaphase → metaphase → telophase D Prophase → metaphase → anaphase → telophase 2 Enzymes are highly specific in the reactions they catalyse. Which of the following statements explains this characteristic of enzymes? A Protein molecules consist of helical structures. B Protein molecules consist of many amino acids. C Each enzyme molecule has a distinctive configuration. D Protein molecules are not destroyed by heat. 3 Which of the following is not the characteristic of mitosis? A Daughter cells are genetically different from parent cell and from each other. B Damaged cells can be replaced by production of identical new cells. C New cells produced are used for growth of multicellular organisms. D The offsprings produced are identical to the parent. 4 Which of the following statements about lipids is false? A A wax is lipid. B Unsaturated fats are liquid at room temperature. C The body doesn’t need any cholesterol. D Both male and female sex hormones are steroids. 5 Which of the elements are present in carbohydrate ? I Carbon II Hydrogen III Nitrogen IV Oxygen A B C D 4551 @ 2009 I and III only I, II and IV only II, III and IV only I, II, III and IV 2 SULIT
  2. 2. SULIT 6 4551 The DIAGRAM 1 below shows cell M and cell N. In which direction will water move between cell M and cell N? A C 7 DIAGRAM 1 N to M by simple diffusion B N to M by active transport D M to N by active transport N to M by osmosis The DIAGRAM 2 below shows a cell cycle. DIAGRAM 2 What is the process occur during V? A Replication of DNA. B Replication of centrioles. C Chromosomes condense and become shorter and thicker. D High metabolic rate and synthesis of proteins and cellular organelles. 8 Which elements are found in nucleic acids? A B C D 4551 @ 2009 Carbon and hydrogen. Carbon, hydrogen and oxygen. Carbon, hydrogen, oxygen and nitrogen. Carbon, hydrogen, oxygen, nitrogen and phosphorus. 3 SULIT
  3. 3. SULIT 9 4551 DIAGRAM 3 shows one of the four levels in protein structures DIAGRAM 3 The level and example for such protein are A B C D 10 The DIAGRAM 4 below shows the condition of a plant cell after immersed in a particular solution for 15 minutes. A B C D 11 tertiary structure, enzymes. tertiary structure, haemoglobin quaternary structure, enzymes. quaternary structure, haemoglobin. DIAGRAM 4 Cell sap loses its mineral salts through osmosis. It is flaccid. The pressure of the cell increases. It has a very high osmotic pressure. Which of the following is not true about the differences between saturated fat and unsaturated fat? A B C D 4551 @ 2009 Saturated fat Solid at room temperature. High cholesterol content. No double bond present between two carbon atoms. Able to react with additional hydrogen atom. Unsaturated fat Liquid at room temperature. Low cholesterol content. Double bond present between two carbon atoms. Unable to react with additional hydrogen atom. 4 SULIT
  4. 4. SULIT 12 4551 The DIAGRAM 5 shows the structure of a nucleotide. DIAGRAM 5 What are represented by the units labelled as X, Y and Z? A B C D X Phosphate group Phosphate group Sugar Nitrogenous base Y Sugar Nitrogenous base Nitrogenous base Phosphate group Z Nitrogenous base Sugar Phosphate group Sugar 13 A bivalent is the name for A synapsis of a pair of homologous chromosomes. B a pair of sister chromatids. C a pair of non-homologous chromosomes. D one homologous chromosome. 14 Which one of the following nutrients, needed for the purpose of tissue growth and repair, cannot be made by the human body? A Amino acids B Protein C Non-essential amino acids D Essential amino acids 15 The statement below show the use of a specific enzyme in industries and daily lives. • Tenderising meat • Separating fish skin • Extracting fur from animal skin Based on the above information, which of the following enzymes is used? A Trypsin B Erepsin C Rennin D Protease 4551 @ 2009 5 SULIT
  5. 5. SULIT 16 4551 The graph shows the effect of pH on the rate of reaction of enzyme X. Enzyme X is A lactase. C trypsin. B D salivary amylase. rennin. 17 Glucose Process X + → Y + Water Galactose What are represented by X and Y? A B C D 18 X Condensation Condensation Hydrolysis Hydrolysis Y Maltose Lactose Lactose Maltose Which of the following diagrams is not true about a stage in mitosis? 4551 @ 2009 6 SULIT
  6. 6. SULIT 4551 A C 19 B D The DIAGRAM 6 shows a graph of rate of reaction against substrate concentration of an enzyme-controlled reaction by using 0.2% enzyme concentration. DIAGRAM 6 A 4551 @ 2009 B 7 SULIT
  7. 7. SULIT 4551 C 20 D Groundnuts contain a nutrient which is broken down by lipase during germination. Which test would detect this nutrient? A Benedict’s test B Translucent paper test C Iodine test D Burette Test 4551 @ 2009 8 SULIT
  8. 8. SULIT 21 4551 The DIAGRAM 7 below shows diffusion through a semi-permeable membrane. DIAGRAM 7 What are P and Q? P Distilled water 20% sucrose solution 20% sucrose solution Distilled water A B C D Q Distilled water 20% sucrose solution Distilled water 20% sucrose solution 22 Which enzyme, substrate and conditions are needed for the digestion of food in the stomach? Enzyme Substrate Conditions A amylase starch acid B amylase starch alkaline C protease protein acid D protease protein alkaline 23 The following information refers to organelle P. • • Produces lipid Transport of proteins to be used in the cell membrane Identify organelle P. A Mitochondrion C Smooth endoplasmic reticulum 24 D B Nucleus Golgi apparatus Which of the following graphs represents the effect of pH on the rate of reaction of enzyme secreted by the pancreas? A 4551 @ 2009 B 9 SULIT
  9. 9. SULIT 4551 C 25 D If an animal cell is placed into a solution whose concentration of dissolved substances is higher than that inside the cell, A the cell will swell. B the cell will shrivel. C the cell is described as plasmolysis. D the cell is described as deplasmolysis. 4551 @ 2009 10 SULIT
  10. 10. SULIT 4551 Section B ( 30 marks ) Answer all questions 1 The DIAGRAM 8 below shows the model of a plasma membrane. (a) (i) (ii) DIAGRAM 8 What name is given to the above plasma membrane model? ___________________________________________________________ [1 mark] Give two characteristics of the model you mentioned in (a)(i). 1:__________________________________________________________ 2:__________________________________________________________ [2 marks] (b) Name the structures labelled P, Q, R and S. P: _____________________________________________________________ Q: _____________________________________________________________ R: _____________________________________________________________ S: _____________________________________________________________ [4 marks] (c) What is the main characteristic of structure labelled P? _______________________________________________________________ _______________________________________________________________ [2 marks] 4551 @ 2009 11 SULIT
  11. 11. SULIT 4551 (d) What is the function of structure Q in plasma membrane? _______________________________________________________________ [1 mark] 2 The DIAGRAM 9 below shows a reaction catalysed by enzyme. DIAGRAM 9 (a) Name the parts labelled S, T and U. S: _____________________________________________________________ T: _____________________________________________________________ U: _____________________________________________________________ [3 marks] (b) State two characteristics of T. 1: _____________________________________________________________ 2: _____________________________________________________________ [2 marks] (c) If T represents lipase, what is U? _______________________________________________________________ _______________________________________________________________ [2 marks] (d) State and explain the use of lipase in industry processes. _______________________________________________________________ 4551 @ 2009 12 SULIT
  12. 12. SULIT 4551 _______________________________________________________________ _______________________________________________________________ [3 marks] 3 The DIAGRAM 10 shows a phase in cell division. P Q R DIAGRAM 10 (a) Name the parts labelled P, Q and R. P: ___________________________________________________________ Q: ___________________________________________________________ R: (b) (i) ___________________________________________________________ [3 marks] Name the type of cell division. (ii) ___________________________________________________________ [1 mark] Name the phase shown above. _____________________________________________________ [1 mark] (c) Describe the process happen in P. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ [3 marks] (d) Name two phases that happens after the phase shown above. 4551 @ 2009 13 SULIT
  13. 13. SULIT 4551 1: _____________________________________________________________ 2: _____________________________________________________________ [2 marks] END OF QUESTION SCHEME MARKS BIO F4 ASSESSMENT 2 SECTION A QUESTION 1 2 3 4 5 6 7 8 9 10 11 12 13 TOPIC 5 4 5 4 4 3 5 3 3 3 4 4 5 TOPIC 3 4 5 ANWER D C A C B D D D D A D A C QUESTION 14 15 16 17 18 19 20 21 22 23 24 25 TOPIC 5 4 4 5 4 4 5 4 3 4 4 3 ANSWER D D B B C C B C C C C B QUESTION 7 11 7 SECTION B NO 1 ANSWER (a) (i) Fluid mosaic model MARK [1 mark] (ii) 1: Plasma membrane is comprised of the phospholipid bilayer 2: Various types of protein molecules are embedded in the plasma membrane [1 mark] [1 mark] (b) P - Phospholipid bilayer Q - Cholesterol R - Carrier protein S - Pore protein [1 mark] [1 mark] [1 mark] [1 mark] (c) Contain phospholipid molecules that contain [2 marks] 4551 @ 2009 14 SULIT
  14. 14. SULIT 4551 hydrophilic head and hydrophobic tail. [1 mark] (d) Maintain the fluidity of plasma membrane 2 [1 mark] [1 mark] [1 mark] (b) 1: Chemical reaction catalysed by T is a reversible reaction. 2: It act specifically [1 mark] (c) U is glycerol and fatty acid [2 marks] (d) Manufacturing detergent - detergent with added lipase can clean cloth with oil stain effectively. Or any suitable answer P - Chiasmata Q - Homologous chromosomes R – Centriole [3 marks] (b) (i) Meiosis (ii) Prophase I [1 mark] [1 mark] (c) 3 (a) S: Substrate T: Enzyme U: Product (The process of crossing over occur in P). (During crossing over), (exchange of genetic [1 mark] materials between two chromatid sisters [1 mark] takes place). [1 mark] (a) (d) 1: Metaphase I 2: Anaphase I 4551 @ 2009 [1 mark] [1 mark] [1 mark] [1 mark] [1 mark] [1 mark] 15 SULIT

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