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Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level BIOLOGY 9700/12 Paper 1 Multiple Choice February/March 2016
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    This document consists of 15  printed pages and 1  blank page. IB16 03_9700_12/3RP © UCLES 2016 [Turn over          *                 4                 3                 4                 0                 5                 2                 9                 9                 5                 8                *              Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level BIOLOGY 9700/12  Paper 1 Multiple Choice  February/March 2016   1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT  WRITE IN ANY BARCODES. 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 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 booklet. Electronic calculators may be used.  2   © UCLES 2016 9700/12/F/M/16 1  A student has drawn a cell structure as seen using a light microscope. The magnification of the drawing is × 600. The length of the structure on the drawing is 6   mm. What is the actual length of the cell structure? A 1 ×  10 –1   µ m B 1 ×  10 0   µ m C 1 ×  10 1   µ m D 1 ×  10 2   µ m 2  The electron micrograph shows part of a eukaryotic cell. Which of the labelled organelles is a site of protein synthesis? ABCD   3  Inside a cell, a damaged mitochondrion can be surrounded and enclosed by a membrane to form a vesicle. What happens after the fusion of a lysosome with the vesicle? A  ATP production by the mitochondrion increases. B Enzymes from the lysosome repair the mitochondrion. C Hydrolytic enzymes catalyse the breakdown of the mitochondrion. D The mitochondrion is released from the cell by exocytosis.  3   © UCLES 2016 9700/12/F/M/16 [Turn over    4  Which units are the most appropriate to record the diameter of a lymphocyte and a red blood cell? lymphocyte red blood cell A mm mm B mm µ m C µ m mm D µ m µ m 5  Which structures will be present in a cell that causes cholera? 1 circular DNA 2 naked DNA 3 70S ribosomes A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only 6  What may take place during a hydrolysis reaction? 1 a molecule of water is produced 2 a glycosidic bond is broken 3 a sucrose molecule is split into fructose and glucose A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only 7  The table shows some information about four carbohydrate polymers. polymer α -1,4 glycosidic bonds α -1,6 glycosidic bonds shape of molecule 1      helical key 2      branched  = present 3      helical  = absent 4      branched Which two polymers form starch? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4  4   © UCLES 2016 9700/12/F/M/16 8  Which molecule in the key is sucrose? contains pentose sugarcontains hexose sugar is a reducing sugar  A B C D yesnoyesnoyesno   9  Which statements about triglycerides and phospholipids are correct? 1 Triglycerides and phospholipids both have a hydrophobic region. 2 Triglycerides are non-polar molecules and phospholipids are polar. 3 Fatty acids in a triglyceride may be saturated or unsaturated but in a phospholipid they are always saturated. A 1 and 2 B 1 and 3 C 2 only D 3 only 10  When proteins are mixed with some organic solvents, hydrophobic interactions and hydrogen bonding are changed in the protein molecules. Which levels of protein structure would be affected? level of protein structure secondary tertiary quaternary A         key B           = affected C           = not affected D          11  The rate of enzyme-catalysed reactions in human cells is regulated. What may be involved in such regulation? 1 a change in enzyme concentration 2 a change in substrate concentration 3 inhibition by the final product of the reaction A  1, 2 and 3 B  1 and 2 only C  1 and 3 only D  2 and 3 only
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