Bendemeer Sec Pure Bio 2024 P1, P2, MS

CANDIDATE NAME CLASS INDEX NUMBER ------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------- READ THESE INSTRUCTIONS FIRST Write in 2B pencil. Write your name, class and register number on the work you hand in. Do not use paper clips, glue or correction fluid. There are forty questions on 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 2B pencil on the 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 on the question paper. The use of approved scientific calculator is expected, where appropriate. This document consists of 20 printed pages. BIOLOGY 6093 / 01 Paper 1 27 August 2024 1 hour

2 1 The diagram represents the cell structures of a human liver cell, a leaf palisade and a human red blood cell. What is cell structure X? A cell wall B chloroplast C cytoplasm D nucleus 2 Four students ( A , B , C and D ) were asked to match the function with the appearance of some cell structures in an animal cell. The functions were listed below. I detoxifies harmful substances II mRNA passes through to the ribosome III stores and packages hydrolytic enzymes The appearances were listed by letter. V a double membrane interspersed with pores W a double membrane with highly folded inner layer X membrane-bound sacs, arranged as a flattened stack Y membrane-bound, network of tubular spaces Z non-membrane bound, spherical structures Which student correctly matched the function with the appearance of the cell structure? I II III A V W Y 6093/01 / Sec Four Express / PRELIM / BDMS 2024

3 B V Y Z C Y V X D Y W Z 3 Four freshly cut potato cylinders were soaked for one hour in different salt solutions. The potato cylinders were then pinned to cork blocks. Two of the potato cylinders are shown. Which solution would cause the potato cylinder to be the most flaccid? A 0.1 mol per dm 3 salt solution B 0.3 mol per dm 3 salt solution C 0.7 mol per dm 3 salt solution D 1.0 mol per dm 3 salt solution 4 An experiment was carried out to investigate the effect of surface area to volume ratio on diffusion. A block of agar containing sodium hydroxide solution and Universal Indicator solution was cut into three smaller blocks of different sizes, as shown. All dimensions are in centimetres. The block were placed in a solution of 0.1 mol/dm 3 hydrochloric acid. As the hydrochloric acid diffus