Midyear Bio Paper 1

8/9/2019 Midyear Bio Paper 1

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Instruction: This paper consists of 50 questions. Answerall questions.

1. Which of the following structures can be found in a mesophyll cell, a root epidermal cell and a

xylem vessel?

A Nucleus

B Vacuole

C Cell wall

D Chloroplast

2. Which statement is true about facilitated diffusion?

A It involves metabolic energy.

B It does not occur through semi- permeable membranes.

C Molecules combine with carrier proteins in the plasma membrane.

D It hastens the movement of molecules from a region of lower concentration to a region of

higher concentration.

3.

Table 1

A suitable enzyme that can be used in the activities in Table 1 is

A zymase

B amylase

C proteaseD cellulase

4. In the human body, active cell division does not occur in the

A brain

B testis

C epidermis

D bone marrow

5. Which of the following is an energy- rich carbohydrate stored in large quantities in muscle and

liver cells?

A starch

B glucose

C sucrose

D glycogen

y Remove skin from wheaty Separate agar from seaweed


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6. The geneti

material ofthe celli located in the

A vacuoles

B cytoplasm

C chloroplast

D chromosome

7. Which ofthe following process causes juice to ooze out when sugaris sprinkled on strawberries?

A Osmosis

B Diffusion

C Condensation

D Active transport

8. Diagram 1 shows two salt solutions separated by a selectively permeable membrane.

Diagram 1

In which ofthe following cases willthere be a net movement of water from P to Q?

Concentration of P Concentration of Q

A 0.1% 0.1%

B 0.1% 0.5%

C 0.5% 0.1%

D 0.5% 0.5%

9. If a raisin is soaked in li

uid A, it will expand. This shows thatli

uid A is

A isotonic

B hypotonic

C hypertonic

D plasmotonic


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10. The following information refers to organelle X.

y It has ribosomes attached to the membrane.y Its functions is to transport protein that are synthesized atthe ribosomes

Whatis organelle X?

A NucleusB Golgi apparatus

C Rough endoplasmic reticulum

D mooth endoplasmic reticulum

11. The rate of diffusion depends on

I temperature

II distance of diffusion

III concentration gradient

IV size of particles to be diffused

A I and II only

B II and III only

C I, II and III only

D I, II, III and IV

12. The graph in Diagram 2 shows the percentage of plasmolysed cells in a piece ofleaf epidermis

placed in as salt solution of different concentrations.

Diagram 2

Why some cells plasmolysed butthe others were not when immersed in 0.4% salt solution?A The cells had different sizes.

B Different cells had different water potentials.

C The cells belonged to differenttypes oftissues.

D Only the cells atthe edges were affected by the salt solution.


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13. Which of following is an example of diffusion in plants?

A Movement of waterin the xylem from the roots to the leaves

B Movement ofions into root hairs againstthe concentration gradient

C Movement of carbon dioxide from the airinto a photosynthesizing leaf

D Movement of sugar molecules in the phloem from the leaves to the roots

14. Proteins are complex organic compounds and consist of

I Carbon

II Oxygen

III Nitrogen

IV Hydrogen

A I and II

B III and IV

CII

,III

andIV

D I, II, III and IV

15. Which ofthe following secretions contains the enzyme amylase?

A bile

B gastric juice

C intestinal juice

D pancreatic juice

16. Diagram 3 below shows an animal cell during anaphase I of meiosis.

Diagram 3

How many chromosomes are there in the parent cell ofthis animal cell?

A 3

B 6

C 12

D 24


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17. Which ofthe following cells contain a large number of mitochondria?

A perms

B Cheek cells

C Red blood cells

D Epidermal cells ofleaves

18. According to the lock and key hypothesis of enzymatic reaction, which ofthe following

molecules, A, B, C orD, represents the enzyme?

19. Which ofthe following events occurs during mitosis?

A Duplication of chromosomes occurs during anaphase.

B The nuclear membrane disappears during metaphase.

C ister chromatids are pulled to opposite poles during anaphase.

D Homologous chromosomes are arranged atthe metaphase plate during prophase.

20. Triglyceride is formed through the condensation of

A one molecule of glucose and three molecules of fatty acids

B one molecule of glycerol and three molecules of fatty acids

C one molecule of glucose and three molecules of amino acids

D one molecule of glycerol and three molecules of amino acids

21. Benedicts solution is used to indicate the presence of ____________in a food sample.

A lipid

B protein

C reducing sugar

D non-reducing sugar

22. Which ofthe following organelles carries out detoxification of drugs in the body?

A Lysosome

B Golgi apparatus

C Rough endoplasmic reticulum

D mooth endoplasmic reticulum


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23. A student soaked an egg in a saturated salt solution. A few days later, he found thatthe egg

tasted salty. Which ofthe following statements explain this observation?

I The egg shellis permeable to salt solution.

II alt particles enterthe egg by active transport.

III The saturated salt solution is hypertonic to the content of egg.

IV alt particles can diffuse through the egg shell and plasma membrane.

A I and III

B I and IV

C I, III and IV

D II, III and IV

24. Diagram 5 shows a major system in humans.

Diagram 5

Whatis the major system shown?

A keletal system

B Nervous system

C Excretory system

D Circulatory system

25. During meiosis, the sister chromatids separate during

A anaphase I

B anaphase II

C the phase

D telophase II


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26. Which ofthe following is true about a diploid plant cell before and after a complete meiosis?

DNA replication before

meiosis

Number of daughter cells after

meiosis

A 1 2

B 1 4

C 2 2

D 2 4

27. Diagram 6 shows how an enzyme works.

Diagram 6

Which ofthe following best describes the diagram?

A The rate of enzymatic reaction increases when the temperature increases.

B The optimum temperature forthe maximum rate of enzymatic reaction is 37 C.

C The rate of enzymatic reaction is tripled for every 10 Cincrease oftemperature.

D The rate of enzymatic reaction decreases at high temperature due to the denaturation ofthe

enzyme.

28. Enzymes are inactive at high temperatures because

A they are proteins

B they are biological catalysts

C they are specific in their action

D the optimum temperatures fortheir action is 37 C


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29. An experiment was carried outto investigate the effect of glucose concentration on the mass

of a particular plant cell. Diagram 7 (a) shows the results ofthe experiment.

Diagram 7 (a)

Which point, A, B, C or D, shows the concentration of glucose solution that corresponds to the

condition ofthe plant cell shown in Diagram 7(b)?

Diagram 7 (b)

30. Which ofthe following are uses of waterin plants?

I To hydrolyse food reserve

II To maintain turgidity of cells

III To act as a transportation medium

IV To act as the raw material of photosynthesis

A I and IV

B II and III

C II, III and IV

D I, II, III and IV


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31. Which ofthe following statements are true about mutation?

I It occurs naturally atlow rate.

II Itis the ultimate source of genetic variation.

III Downs syndrome is an example of mutation which affects the DNA ofthe chromosomes.

IV omatic mutations which affectthe non- reproductive cells may be transmitted to the

organisms descendants.

A I and II

B III and IV

C I, III and IV

D I, II, III and IV

32. Diagram 8 shows an event occurring during the cell cycle.

Diagram 8

Which stage of cell cycle does the above eventtake place?

A G1 phase

B phase

C G2phase

D M phase

33. The following equation in Table 2 shows a chemical reaction.

Tabl

2

Which ofthe following cellular structures carries outthe chemical reaction above?A Ribosome

B Chloroplast

C Mitochondrion

D Golgi apparatus

Glucose + Oxygen Carbon dioxide + Water + Energy


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34. Diagram 9 shows fourtypes of protein structures.

Diagram 9

Whatis the correct sequence from primary to quaternary structures of proteins?

A P Q R

B P Q R

C R P Q

D R Q P

35. The continuous and controlled flow of substances across the plasma membrane is importantto

A store toxic substances in the cell.

B prevent water molecules from entering the cell.C maintain a suitable pH and ionic concentration inside the cell.

D preventthe digestive enzymes, hormones and antibodies from secreted outside the cell.

36. The monomer unit for cellulose is...

A glucose

B galactose

C acid amino

D glucose and fructose

37. When vegetables are cutinto small pieces, the juice thatis released comes from

A chloroplast

B lysosomes

C cell vacuoles

D secretory vesicles


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38. Which ofthe following pairs oftissues and functions are correct?

A I and III

B II and IV

C I, II and IV

D I, II, III and IV

39. The structure labelled X in Diagram 10 is known as

Diagram 10

A cholesterol

B pore protein

C phospholipid

D carrier protein

40.

Diagram 11

Diagram 11 shows the structure of enzyme N change to structure R when being heated above

60 Cthrough the process P. Name P.

A Hydrolysis

B Deamination

C Denaturation

D Condensation

Tissue Function

I Meristem tissue Celltissue

II Epidermaltissue Controlthe loss of mineral salts

III Vasculartissue Transport water and nutrient

IV Mechanicaltissue Transport gases


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41. Which of the followings are the functions of lipids?

I Heat insulator

II Build cell walls in plant cells

III Synthesise steroid hormones

IV Solvent for vitamins A, D, E and K

A I, II and III

B I, III and IV

C II, III and IV

D I, II, III and IV

42. Which of the following is the main storage form of carbohydrate in yeast?

A Starch

B Glucose

C Cellulose

D Glycogen

43. Which of the following differentiates metaphase I from metaphase II?

A Metaphase I involves the pairing of homologous chromosomes.

B Metaphase II involves the separation of homologous chromosomes.

C Metaphase II involves the arrangement of homologous chromosomes at the metaphase

plate.

D Metaphase I involves the arrangement of homologous chromosomes at themetaphase

plate.

44. The following information shows an element.

What is the above description referring to?

A Sodium

B Potassium

C Magnesium

D Phosphorus

45. Which of the following statements about the importance of homeostasis is incorrect?

A It allows enzymes to function at an optimal rate.

B It inhibits all the metabolic reactions in the cells.

C It regulates the internal environment to keep it in constant condition.

D Organisms can control the metabolic rate according to its needs through homeostasis.

It can regulate the osmotic pressure and help in the

transmission of nerve impulses in animal cell. It is not

required in plant cell.


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46. Chemical compound Y is important for controlling and regulating allthe activities in the cell.

Whatis Y?

A Lipid

B Enzyme

C Nucleic acid

D Carbohydrate

47. Diagram 12 shows two chromosomes.

Diagram 12

What are P, Q and R?

48. How many chromatids are there presentin a human cell at prophase I of meiosis?

A 184

B 92

C 46D 23

P Q R

A Centromere Chromatid Non - sister

chromatidsB Chromosome Chromatid ister

chromatids

C Chromatid Chromatid Non - sister

chromatids

D Centromere Non - sister

chromatids

Chromatin


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49. Which of the following descriptions about amino acids are true?

I There are 20 types of amino acids occurring in living cells.

II Animal proteins contain all essential amino acids which are required by our body.

III There are 9 types of essential amino acids which are derived from other amino acids.

IV There are 12 types of non- essential amino acids which can be obtained from a healthy diet.

A I and II

B III and IV

C I, III and III

D I, II, III and IV

50. A strip of mustard green stem is coated with petroleumjelly and placed in a concentrated

glucose solution. What will happen to this strip?

A The mass of the strip decreases.

B The length of this strip becomes shorter.

C The texture and the appearance of the strip become soft.

D The strip remains unchanged in its texture, appearance, mass and length.

Prepared by,

.................................(Puan Siti Salwani bt Masrof)Biology teacher

Checked by,

.................................(Puan Umi Kalsum Jan bt Abd Hamid)Biology Head Panel

Approved by,

...................................(Puan Suria bt Hamzah)

Head ofScience and Maths Department

Verified by,

...................................(Puan Nor Aiza bt Alias)

SeniorAssistant ofSMK Kepong

Midyear Bio Paper 1

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