DUNMAN_2025_Prelims Paper 1

This document consists of 21 printed pages. DUNMAN SECONDARY SCHOOL CANDIDATE NAME CLASS INDEX NUMBER PRELIMINARY EXAMINATION 2025 SECONDARY 4 EXPRESS BIOLOGY 6093/01 Paper 1 2 September 2025 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty questions on this paper. Answer all questions. For each questions 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. The use of an approved scientific calculator is expected, where appropriate.

2 6093/01/Prelim/4Exp/2025 1 Which organelle is not correctly paired with its cellular function? organelle function A endoplasmic reticulum transports proteins to the Golgi body B Golgi body stores proteins and carbohydrates C mitochondrion releases energy D ribosome joins amino acids together 2 The diagram shows a bacterial cell. Which cell structure makes bacteria useful in genetic modification? 3 The diagram shows the movement of water through part of a leaf. What processes are involved in the movement of water at these stages? 1−2 3−4 4−5 A diffusion evaporation osmosis B evaporation diffusion osmosis C osmosis diffusion evaporation D osmosis evaporation diffusion

3 6093/01/Prelim/4Exp/2025 4 The diagram represents the phloem pathway, with adjacent cells, from leaf to root in a plant. Which process is occurring between 1 to 2 and what is the effect on the water potential at 2? process from 1 to 2 water potential at 2 A active transport of sucrose becomes more negative B active transport of sucrose becomes less negative C diffusion of sucrose becomes more negative D diffusion of sucrose becomes less negative 5 Which row correctly identifies the chemical elements found in insulin? carbon hydrogen oxygen nitrogen A ✓ ✓ ✓ ✓ key B ✓ ✓ ✓ ✘ ✓ = present C ✓ ✘ ✓ ✘ ✘ = not present D ✘ ✓ ✘ ✓

4 6093/01/Prelim/4Exp/2025 6 Various substances are identified using the following procedures. What could the four substances be? P Q R S A glucose starch protein lipid B glucose sucrose starch protein C sucrose protein lipid starch D sucrose starch lipid protein

5 6093/01/Prelim/4Exp/2025 7 Which graph correctly shows possible changes in energy levels as a chemical reaction progresses with and without an enzyme? 8 The chart gives information about a car being driven a