Biology · 1996 · May · Paper 1 · SL · Question paper

INTE RNATIONAL BACCALAUREATE BIOLOGY Subsídiary Level Monday 13 May 1996 (afternoon) M96/4¡0/S(t) 45 minutesPaper 1 This examination paper consists of 30 questions. Each question otfers four suggested answers. The maximum mark for this paper is 30. This examination paper consists of ten pages. INSTRUCTIONS TO CANDIDATES DO NOT open this examinat¡on paper unt¡l ¡nstructed to do so. Answer ALL questions. For each quest¡on, choose the answer you cons¡der to be the best and indicate your cho¡ce on the answer sheet provided. EXAMINATION MATERIALS Required/Essential: Optically Mark Read (OMR) answer sheet Electronic calculator (neither programmable nor graphic display calculators are allowed) Allowed/Optional: A simple translating dictionary for candidates not working in their own language ll-ó l 70 4 -¿- l' In which of the foilowing ceil structures is ceilurose found? A. Nucleolus B. Chloroplast C. Cell wall D. Cell membrane An element present in proteins but not in carbohydrates is A. carbon. B. hydrogen. C. oxygen. D. nitrogen. 3. A substrate binds to its enzyme at the enzyme,s A. pepride bonds. B. active site. C. last amino acid. D. inner molecular loops. M96/4tols(t) 4' During an experiment, a cell is placed into a solution containing a dye. After a few hours theconcentration of ^the dye insidL tr,. ..il^ir;[ffi ihun th.-.it.i*i sotution. The sameexperiment is o¡rfo.rmed in the -presence or a su6sánce that inhibits ATp utilisation. In thiscase the dye did not enter the cefi. The most probable mechanism by.which the dye entered the cell in the first experiment is A. active transport. B. diffusion. C. osmosis. D. pinocytosis. ) 22-6t10