TMJC 2023 H2 P1 Ans

CANDIDATE NAME ( ) CIVICS GROUP H2 BIOLOGY 9744/01 Paper 1 Multiple Choice Questions 22 September 2023 1 hour Additional material: Multiple Choice Answer Sheet ANSWERS WITH EXPLANATION QUESTION ANSWER QUESTION ANSWER 1 C 16 B 2 C 17 C 3 A 18 D 4 A 19 C 5 D 20 D 6 B 21 C 7 D 22 A 8 A 23 B 9 A 24 A 10 A 25 B 11 A 26 D 12 D 27 B 13 A 28 D 14 D 29 C 15 C 30 B ________________________________________________________________________________ This document consists of 19 printed pages. TAMPINES MERIDIAN JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION

2 Tampines Meridian Junior College 2023 JC2 Preliminary Examination H2 Biology QUESTION 1 [Cell, HI-1] The photomicrograph is of a plant cell. The cell is 25 µm in width from X to Y. What is the magnification of the photomicrograph? A 2 x 101 B 2 x 102 C 2 x 103 D 2 x 104 Explanation Length of drawing of cell = 5cm = 50mm = 50 000 µm Magnification= Length of drawing/actual length = 50 000 / 25 = 2000 = 2 x 103

3 Tampines Meridian Junior College 2023 JC2 Preliminary Examination H2 Biology QUESTION 2 [Cell, HI-2] The diagrams below show the electron micrographs of two organelles P and Q. Which of the following shows the correct identities and functions of P and Q? Identity of P Function of P Identity of Q Function of Q A Nucleosome Transcription of rRNA gene Smooth ER Transport of proteins B Nucleosome Assembly of ribosomal subunits Secretory vesicles Synthesis of lipids C Nucleolus Assembly of ribosomal subunits Smooth ER Synthesis of lipids D Nucleolus Transcription of rRNA gene Secretory vesicles Transport of proteins

4 Tampines Meridian Junior College 2023 JC2 Preliminary Examination H2 Biology QUESTION 3 [Cell, KU-2] Which letter identifies the cell structures where semi-conservative replication of DNA occurs? (A) Explanation: All 3 organelles (chloroplast, mitochondria and nuclei) contain DNA and DNA polymerase which allow DNA replication to occur. QUESTION 4 [Transport, HI-2] The chart shows the concentration of some substances outside the cell, in the cytoplasm, in the chloroplast and in the Golgi body of a plant cell. Which statement about the direction of movement of these substances and the process by which they are moving is correct? A ATP is leaving the chloroplast by facilitated diffusion, water is leaving the plant cell by osmosis. B Phosphate and ATP are entering the chloroplast and Golgi body by active transport. C Phosphate and ATP are leaving the Golgi body by facilitated diffus