Others Trial 2024 Science Kertas 1 · SMKA

Science

Others Trial 2024 Science Kertas 1 · SMKA

• Trial SMKA
• 40 questions
• With explanations

1

Diagram 1 shows a fume chamber in the science laboratory. Which of the following is a function of the fume chamber?

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A To carry out experiments that use volatile, flammable, poisonous, corrosive and odorous substances B To avoid contamination when microbiological activities are carried out C Closed space to protect users and the surrounding area from harmful pathogens D To clean the apparatus used in activities involving the use of dangerous chemicals

T4 Chapter 1.1 Personal Protective Equipment

2

Which of the following is the correct way to manage biological waste substances?

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A Sharp equipment such as syringes and needles should be autoclaved before being stored in a safe place before disposal B Specimens such as blood and serum do not need to be autoclaved to decontaminate before being disposed of directly into the sewage system C Non-sharp solids such as tissue and culture medium can be placed in biohazard bins without having to be wrapped in biohazard plastic bags D Specimens such as laboratory animals and experimental animals should be wrapped in absorbent material, tightly packed in biohazard plastic bags and frozen before disposal

T4 Chapter 1.2 Disposal of Waste

3

The following information shows the steps involved in Cardiopulmonary Resuscitation (CPR). S : Open the airways P : Chest compressions are made Q : Give breathing aid M : Check the reaction of the victim Which of the following shows the correct sequence of the steps involved?

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A S, P, M, Q B M, Q, S, P C P, Q, S, M D M, S, P, Q

T4 Chapter 2.1 Cardiopulmonary Resuscitation (CPR)

4

Diagram 2 shows a person using a sphygmomanometer to measure blood pressure. The screen shows the readings 118 (top), 65 (middle) and 76 (bottom). Which of the following shows the correct reading? | | Systolic pressure | Diastolic pressure | Pulse rate | |---|---|---|---| | A | 76 | 65 | 118 | | B | 118 | 65 | 76 | | C | 65 | 118 | 76 | | D | 118 | 76 | 65 |

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A A B B C C D D

T4 Chapter 3.3 Blood Pressure

5

Table 1 shows the Body Mass Index (BMI) of four students. | Students | Body Mass Index, BMI (kg/m^2^) | |---|---| | Nabila | 27.0 | | Athirah | 33.4 | | Fasha | 16.5 | | Mashitah | 20.1 | Which students belong to the group of desirable weight and obese? | | Desirable weight | Obese | |---|---|---| | A | Nabila | Fasha | | B | Fasha | Mashitah | | C | Mashitah | Athirah | | D | Athirah | Nabila |

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A A B B C C D D

T4 Chapter 3.4 Body Mass Index (BMI)

6

Which of the following is a socio-scientific issue in the transportation sector?

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A The price of vehicles is too high B The burning of fuel by the engines of vehicles releases greenhouse gases C The usage of green energy resources by vehicles affects our health D The number of heavy vehicles on the road is increasing

T4 Chapter 4.5 Transportation Sector

7

What can you do to help reduce greenhouse gas emissions and decrease the carbon footprint?

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A Switch off electrical appliances when not in use B Use plastic bags C Use a cloth dryer D Cut down trees

T4 Chapter 4.6 Green Technology and Life

8

Diagram 3 shows process Q that occurs in meiosis. What is the importance of process Q?

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A To control cell division B To determine the gender of a baby C To produce variation in humans D As a method of asexual reproduction

T4 Chapter 5.1 Cell Division

9

Diagram 4 shows a cross between a white flower plant and a red flower plant. | | | | | |---|---|---|---| | Parents | White flower plant | × | Red flower plant | | First generation | White flower plant | | Red flower plant | | Ratio | 1 | : | 1 | If G represents the dominant gene for red flower and g represents the recessive gene for white flower, what is the genotype of the parents? | | White flower plant | Red flower plant | |---|---|---| | A | GG | gg | | B | gg | GG | | C | Gg | gg | | D | gg | Gg |

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A A B B C C D D

T4 Chapter 5.2 Inheritance

10

Which of the following is **not** a good effect of Genetic Engineering Technology in life?

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A Genetic research creates new species and causes the extinction of some original species B Production of insulin and enzymes from bacteria is important for human health C Quality crops and livestock are produced D Genetic diseases are detected and can be treated at an early stage

T4 Chapter 5.4 Genetic Engineering Technology

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