CHIJ 2025 Sec 4E Biology Prelim Paper 1

1 [Turn over CONVENT OF THE HOLY INFANT JESUS SECONDARY Preliminary Examination in preparation for the General Certificate of Education Ordinary Level 2025 CANDIDATE NAME CLASS REGISTER NUMBER BIOLOGY Paper 1 Multiple Choice 6093/01 3 September 2025 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and register number on the answer sheet (OMR) in the spaces provided. There are forty questions in this paper. Answer all questions. For each question, there are four possible answers A, B, C, and D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. This document consists of 21 printed pages and 3 blank pages. O

2 CHIJSec/2025/OlevelPrelim/6093/01 1 The diagram shows a cell taken from the leaf of a plant. Which structures cannot be found in an animal cell? A P and R only B P and S only C P and Q only D S and T only 2 Hormones are chemical substances which help to regulate processes that occur within the human body. They are essentially made of proteins which are modified before being released by cells into the bloodstream. Which structure in the cell is responsible for the modification before the hormone is released into the bloodstream? A Golgi apparatus B nucleus C rough endoplasmic reticulum D ribosome 3 Root hair cells absorb various substances from soil solution for plants to survive and carry out chemical processes throughout the day. This is done by using different methods for movement of substances into the cell. Which method of movement of substances would be affected if the root hair cell lacked oxygen? A active transport only B diffusion only C diffusion and active transport only D osmosis only P Q R S T

3 [Turn over CHIJSec/2025/OlevelPrelim/6093/01 4 A patient had undergone extensive surgery to repair damage to his leg due to a bad fall. The surgery involved removing damaged muscle tissue which would take time for the body to regrow and develop through his own cell division. As his doctor, which type(s) of nutrient(s) would you advice the patient to eat more of to aid the body’s recovery? A carbohydrate only B protein only C carbohydrate and protein D protein and fat 5 You are provided with two test-tubes of which one contains an enzyme, while the other contains distilled water. Which food test would you carry out to prove which of the two test-tubes contains an enzyme? A Benedict’s test B biuret test C ethanol emulsion test D iodine test 6 An enzyme was taken from a part of the alimentary canal and tested for its activity when pH changes. The result is shown below. From which part of the alimentary canal is this enzyme taken from? A large intestine B mouth C stomach D small intestine

4 CHIJSec/2025/OlevelPrelim/6093/01 7 Which is an effect in the body if bile is no longer secreted into the small intestine? A protein digestion is incomplete B starch digestion is incomplete C fat digestion slows down D fat digestion stops 8 Which chamber of the heart would be the first to receive nicotine absorbed into the blood in the lungs of a cigarette smoker? A left atrium B left ventricle C right atrium D right ventricle 9 The diagram shows the blood pressure of a person at rest as the blood leaves the heart and passes through arteries and then capillaries. Which line shows the pressure of blood as it flows through veins before returning to the heart?

5 [Turn over CHIJSec/2025/OlevelPrelim/6093/01 10 Which option would result in agglutination of blood? donor blood group recipient’s blood group A A A B A AB C AB B D O A 11 The diagram shows the human gas exchange system. What are the labelled parts? 1 2 3 4 A alveolus trachea bronchus bronchiole B bronchiole alveolus trachea bronchus C bronchus bronchiole alveolus trachea D trachea bronchus bronchiole alveolus

6 CHIJSec/2025/OlevelPrelim/6093/01 12 The graph shows changes in the volume of a person’s lungs over a period of two minutes. What could cause the change in the pattern of the graph between X and Y? A changing from running to walking B changing from walking to running C decreased frequency of contractions of the diaphragm muscles D decreased strength of contractions of the internal intercostal muscles 13 Two people of equal body mass do the same amount of exercise. One person is in good health. The other person has emphysema. The rate of oxygen entering each person’s blood in the lungs is measured. The results are shown in the table. healthy person person with emphysema oxygen entering blood in cm3 per minute 22 12 Which statement explains these results? A The healthy person has a faster breathing rate. B The healthy person has a smaller lung volume. C The person with emphysema has damaged muscles in the diaphragm. D The person with emphysema has larger alveoli.

7 [Turn over CHIJSec/2025/OlevelPrelim/6093/01 14 The diagram shows the human urinary system. Which structure is the urethra? 15 The diagram below shows the structure of a kidney tubule and its associated blood vessels. Which row correctly identifies the region where reabsorption of each nutrient into the blood capillary is possible? glucose mineral salt water A 1 2 5 B 2 6 4 C 2 4 3 D 3 6 3

8 CHIJSec/2025/OlevelPrelim/6093/01 16 The diagram shows how a kidney dialysis machine works. Each shape represents a molecule found in blood or dialysis fluid. Which shape represents urea? 17 After running on a hot day, a student becomes dehydrated and the water potential of the blood decreases. Which response helps to regulate the water potential of the blood in the student? A The pituitary gland releases more ADH, stimulate the kidneys to reabsorb more water. B The pituitary gland releases less ADH, stimulate the kidneys to reabsorb more water. C The pancreas releases more insulin to stimulate the liver to absorb more glucose. D The muscles in the body contract more frequently to increase the body temperature.

9 [Turn over CHIJSec/2025/OlevelPrelim/6093/01 18 Which parts of the skin are involved in the control of body temperature? sweat glands temperature receptors blood vessels A ✓ ✓ ✓ key B ✓ ✓  ✓ = yes C ✓  ✓  = no D  ✓ ✓ 19 The diagram shows a reflex arc in a human nervous system. The person’s finger has just made contact with a sharp object. Which part is the motor neurone? 20 Which is an example of a reflex action? A increasing the blood glucose level by eating rice B lifting a carton of bottled water off the floor by contracting your arm and leg muscles C preventing an insect from flying into your eye by blinking D using your brain to work out the answer to a problem

10 CHIJSec/2025/OlevelPrelim/6093/01 21 The diagrams show the eye viewed from the front and its lens in cross-section. Which diagrams show the appearance of the pupil and the shape of the lens when looking up at the sky at night? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4 22 Which table shows the features of bacteria and viruses? A feature bacteria virus cell membrane ✓ ✓ key cell wall ✓  ✓ = yes nucleus ✓   = no B feature bacteria virus cell membrane ✓  cell wall ✓  nucleus  