Woodgrove T3W2 4E Pure Biology Prelim 2023_paper2_updated

1 Name Index Number Class O LEVEL PRELIMINARY EXAMINATION 2023 LEVEL & STREAM : Four (Express) SUBJECT (CODE) : Biology ( 6093 ) PAPER NO : 2 DATE (DAY) : 12 September 2023 ( Tuesday ) DURATION : 1 h 45 mins READ THESE INSTRUCTIONS FIRST Write your class, index number and name on the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions in the spaces provided. Section B Answer all the questions, the last question is in the form either/or. Write your answers in the spaces provided on the Question Paper. The use of an approved scientific calculator is expected, where appropriate. You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Section Marks A /50 B /30 Student’s Signature Parent’s Signature Total /80 Date Date This document consists of 20 printed pages including this cover page Setter : Miss Ng Shuwen

2 Section A Answer all questions. Write your answers in the spaces provided on the question paper. 1 Fig. 1.1 shows a section through part of a dicotyledonous a leaf when viewed using a light microscope. Fig. 1.1 (a) (i) State the term used to describe a group of cells, such as those in part A or part B of the leaf cross-section. __________________________________________________________ [1] A B

3 (ii) Fig. 1.2 shows an enlargement of one cell from part A of the leaf section. Fig. 1.2 Complete Fig.1.2 by drawing and labelling to show the position of • one chloroplast • three other types of named cell component that will be visible. [4] (iii) On Fig.1. 1, label and name one cell in the lower epidermis that would also contain chloroplasts. [1] (b) Explain how Part B is adapted to facilitate transpiration in this leaf. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ __________________________