2014 HCI H1 Biology Prelims P1 Questions

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2 © Hwa Chong Institution 2014 8875 H1 Biology / JC2 Preliminary Examinations / Paper 1 2 Which statements about plant vacuoles are correct? 1 Vacuoles are surrounded by a single selectively permeable membrane. 2 Vacuoles are the main store of amino acids, especially in actively growing cells. 3 Water passes into vacuoles down a water potential gradient and this helps plant cells remain turgid. 4 The size of the vacuole(s) remains constant in proportion to the size of the cell, regardless of the water content of the cell. A 1 and 2 B 1 and 3 C 1, 3 and 4 D 2, 3 and 4 1 The distribution of membranes in the organelles of three cell types, a prokaryotic cell, a liver cell and an enzyme-secreting cell from the st omach, is determined. For each organelle, the amount of membrane is expressed as a percentage of the total amount of membrane in the cell. Which row of values best represents the membrane distribution in the three cell types? CM : cell membrane rERM : rough endoplasmic reticulum membrane IMM : inner mitochondrial membrane OMM : outer mitochondrial membrane prokaryotic cell liver cell stomach cell CM rERM IMM rERM OMM IMM rERM OMM IMM A 99 0 0 35 7 28 60 16 4 B 99 0 0 35 7 28 60 4 16 C 52 12 36 60 7 28 35 4 16 D 52 12 36 60 28 7 35 4 16

3 © Hwa Chong Institution 2014 8875 H1 Biology / JC2 Preliminary Examinations / Paper 1