ACJC H2 Bio Prelim P1_compiled_Ans

This paper consists of 19 printed pages. [Turn over Anglo-Chinese Junior College JC2 Biology Preliminary Examination Higher 2 BIOLOGY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 9744/01 15 September 2023 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and index number in the answer sheet provided. There are thirty 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 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 Question Paper. The use of an approved calculator is expected, where appropriate.

2 Anglo-Chinese Junior College 2023 J2 H2 9744 Paper 1 Preliminary Examination 1 How many statements about the nucleus are correct? 1 The nucleolus comprises entirely of heterochromatic DNA. 2 The nuclear pores facilitate the separate movement of rRNA and ribosomal proteins out of the nucleus. 3 The nucleoplasm can only contain pre-mRNA and not mature mRNA. 4 The nuclear envelope will only disintegrate during apoptosis. 5 There will always be only one nucleolus per nucleus. A None B 1 C 2 D More than 2 AOA 2 Protozoans are single-celled eukaryotic organisms that can either be free-living or parasitic. Plasmodium falciparum, which causes the disease malaria, is an example of a parasitic protozoa. The diagram shows the basic cellular structure s of P. falciparum at a particular stage of its life cycle. Which features are shared between P. falciparum and typical bacterial cells? 1 presence of cell wall 2 able to carry out protein synthesis 3 energy production within cell 4 chromosome(s) found within nucleus 5 unicellularity A 1, 2, 3 and 5 B 1, 2 and 5 only C 1, 3 and 4 only D 2, 3 and 5 only Low AOB

3 [Turn over Anglo-Chinese Junior College 2023 J2 H2 9744 Paper 1 Preliminary Examination 3 Archaea are single-celled organisms. The phospholipids within the cell surface membrane of Archaea differ significantly from bacteria and eukaryotes. For instance, Archaeal phospholipids are composed of highly-methylated and saturated hydrocarbon chains that are connected to glycerol via ether bonds instead of ester bonds, and are therefore not prone to hydrolysis. Ethers are characterised by C -O-C linkages. The diagram shows the basic structure of phospholipids in Archaea, bacteria and eukaryotes. Many species of Archaea can survive in water and in environments with very harsh conditions s