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Perak Trial 2025 Biology Kertas 1

1
A student is conducting an experiment involving the use of a thermometer. Accidentally, he had dropped the thermometer on the floor and the thermometer broke. Which of the following is the first step that the student should take in managing the spilled mercury waste?
2
Which of the following substances is absent in the vacuole of plant cells?
3
Diagram 1 shows a bar chart of the density of cell component X in two types of cells. Which of the following statements is correct about X?
4
Diagram 2 shows a part of the structure of plasma membrane. What is the characteristic of P?
5
Diagram 3 shows a graph for the relationship between the percentage of haemolysed red blood cells and the concentration of sodium chloride solution. Which of the following is correct about the condition of the red blood cells in solution P and S?
6
The following equation shows a biochemical reaction. Apakah R and S?
7
Diagram 4 shows a graph of rate of enzyme reaction for enzyme J, K and L which is influenced by surrounding pH. Which of the followings represents enzyme J, K and L?
8
Diagram 5 shows a technique used by a farmer. What is the advantage of the technique?
9
Diagram 6 shows the karyotype of a child with a genetic disorder. What is the cause of the genetic disorder?
10
The following equation shows a process in an aerobic respiration. Which of the followings is correct about the equation?
11
Diagram 7 shows a respiratory system of an insect. What is the advantage of having structure X to the respiratory system of the insect?
12
Diagram 8.1 shows the alveoli of a healthy individual whereas Diagram 8.2 shows the alveoli of an individual with disease W. What is disease W?
13
Diagram 9 shows a part of the human digestive system. What will happen if P is blocked?
14
The following equation shows a process in an aerobic respiration. | Larutan / Jus Solution / Juice | Isipadu larutan / jus yang diperlukan untuk melunturkan warna larutan DCPIP (ml) Volume of solution / juice needed to decolourise DCPIP solution (ml) | Peratus Vitamin C (%) Percentage of Vitamin C (%) | |---|---|---| | Larutan asid askorbik 0.1% 0.1% ascorbic acid solution | 1.1 | 0.10 | | Jus lobak merah Carrot juice | 5.6 | Q | Jadual 1 Table 1 What is the value of Q?
15
Diagram 10 shows the blood circulatory system of organism T. What is organism T?
16
Diagram 11 shows disease X that is caused by a vector. Which of the following is the way to control the population of the vector that causes disease X?
17
Inflammatory response is the second line of defence. What is the role of histamine in this response?
18
Diagram 12 shows longitudinal section of human brain. What is the part labelled X?
19
A patient with diabetes mellitus is at risk of developing complications such as blindness, stroke and kidney failure. What is the best action that should be taken to reduce the complication of the disease in a short period of time?
20
Baroreceptors in the aortic arch and carotid artery are stimulated when blood pressure increase above the normal level. Which of the following is correct to regulate blood pressure back to normal level?
21
Diagram 13 shows an organism. What is the type of skeleton for the organism?
22
Diagram 14 shows a graph for the development of follicle in the ovary in a menstrual cycle. Which of the following statements is correct?
23
Diagram 15 shows the implantation of Z in the endometrium on day 21 in a menstrual cycle of a woman. What might happen if the level of progesterone of the woman drops after two months?
24
Diagram 16 shows the growth curve of a plant. Which of the following statements is correct about the growth curve?
25
A farmer removes the leaves from the young plants before transferring them to an orchard from the nursery. What is the main purpose of the step?
26
Diagram 17 shows an experiment to study the effect of light intensity on the photosynthesis rate of Hydrilla sp. The number of air bubbles released in 5 minutes is recorded. What is the rate of photosynthesis of the plant?
27
Which of the following is a correct example of macronutrient and micronutrient?
28
The following information explains the movement of water and mineral salts in plant. | P | Tindakan kapilari menggerakkan air ke atas melawan tarikan graviti. Capillary action moves water upward against the pull of gravity. | |---|-----------------------------------------------------------------------------------------------------------------------------------| | Q | Tekanan akar menolak air ke dalam salur xilem akar dan seterusnya ke salur xilem batang. Root pressure pushes water into the root xylem vessels and then into the stem xylem vessels. | | R | Tarikan transpirasi menarik molekul air dari dalam salur xilem daun bergerak ke luar daun. The pull of transpiration pulls water molecules from inside the xylem vessels of the leaf to move to the outside of the leaf. | Which sequence of the movement of water and mineral salts is correct?
29
Diagram 18 shows a graph effect of auxin concentration on the root and shoot elongation. What is the effect on cell growth in roots and shoots if the auxin concentration is in the range of 10^-2^ to 1 mg dm^-3^?
30
Diagram 19 shows the carpels in a flower. Which parts labelled A, B, C or D will develop into a fruit after fertilisation?
31
The statement below refers to one of plant classification based on habitat. > Tumbuhan yang boleh menyesuaikan diri untuk hidup di kawasan yang kering dan kekurangan air. What is the classification of the plant?
32
Which of the following is correct about the proper way to write the scientific name of an organism? - I Nama genus bermula dengan huruf besar manakala nama spesies bermula dengan huruf kecil Name of genus starts with a capital letter while name of species starts with a lowercase letter - II Setiap nama saintifik terdiri daripada nama famili dan nama spesies Each scientific name consists of the name of family and the name of species - III Nama saintifik yang ditulis mesti digaris berasingan Scientific names which are handwritten must be underlined separately - IV Nama saintifik dicetak dalam teks yang ditebalkan Scientific names are printed in bolded text
33
Species R is a type of mangrove plant that grows in the zone that is situated further into the land. Which of the following is the characteristic of species R?
34
Table 2 shows the results of a study carried out to estimate the population size of grasshoppers. | Tangkapan Capture | Bilangan belalang yang ditangkap Number of grasshoppers captured | |---|---| | | Bertanda Marked | Tidak bertanda Unmarked | | Pertama First | 41 | - | | Kedua Second | 9 | 35 | Jadual 2 Table 2 What is the estimated population size of the grasshoppers?
35
Diagram 20 shows an activity near a river. What is the effect of the activity?
36
Green technology helps the society to practice ways to sustain the environment. Which of the following practices that turns the old substances into new, beautiful and creative things?
37
Which of the following traits was used in Mendel's experiment?
38
Diagram 21 shows the family tree of Mr. Johnson for color blindness disease. If P marries a normal male, what is the probability that their son is colour blind?
39
Which of the following characteristics is influenced by genetic factor and environmental factor?
40
Diagram 22 shows two organisms that are from the same species. Both organisms are three months old. Organism Q has been produced through genetic engineering. Which of the following is the purpose of producing organism Q?
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