PLMGS 2016 Bio Prelim P1 QP

BIOLOGY (SPA) 5158 Paper 1 Multiple Choice 19 August 2016 Additional Materials: Multiple Choice Answer Sheet Redox Reactions 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name and index number on all the work you hand in. There are forty multiple-choice questions on this paper. Answer all questi ons. 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. 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. ___________________________________________________________________ This paper consists of 20 pages including this cover page CANDIDATE NAME CLASS CLASS INDEX NUMBER CENTRE NUMBER INDEX NUMBER Paya Lebar Methodist Girls’ School (Secondary) Preliminary Examination 2016 Secondary 4 Express 488 trendyline___________________________________________________________________________________________ This paper consists of This paper consists of 202 pages including this cover pagpages including this cover pag d

2 1 The diagram shows part of a leaf in cross-section. Structures X and Y are both part of the same A cell.・ B organ.・ C tissue. D vessel. 2 The diagram shows a male gamete. Which term describes the level of organisation of this gamete? A cell B organ・ C organism D tissue 489 trendyline

[Turn over 3 3 The diagram shows part of a plant root in the soil. The root is absorbing water. At which labelled point is the water potential highest? 4 Which statement describes active transport? A t h e m o v e m e n t o f i o n s t h r o u g h a c e l l m e m b r a n e , r e l e a s i n g e n e r g y B t h e m o v e m e n t o f i o n s t h r o u g h a c e l l m e m b r a n e , u s i n g e n e r g y C t h e m o v e m e n t o f w a t e r t h r o u g h a c e l l m e m b r a n e , r e l e a s i n g e n e r g y D t h e m o v e m e n t o f w a t e r t h r o u g h a c e l l m e m b r a n e , u s i n g e n e r g y 5 A student cuts out four pieces of carrot root of equal size. The pieces are treated as shown in the diagram, and then left for two hours. After two hours, which piece of carrot will be the smallest? boiled carrot A sugar solution boiled carrot B water fresh carrot C sugar solution fresh carrot D water 490 trendyline

4 6 Some organisms live at the bottom of the seas where it is very dark. To synthesise glucose, they use energy from chemicals in very hot water that comes out of volcanoes. What is a distinguishing feature of these organisms? A Their enzymes are easily denatured by heat. B They do not need carbon dioxide. C They do not need to be green. D They obtain energy only as carnivores. 7 Which group of compounds ensures that metabolic reactions take place effectively? A carbohydrates B enzymes・ C fatty acids・ D hormones 8 Which graph shows the effect of temperature between 20 °C and 35 °C on the activity of a human digestive enzyme? 491 trendylinereeeeeeennnnnnnneeeeeeee

[Turn over 5 9 What is an example of assimilation? A a b s o r p t i o n o f g l y c e r o l i n t o l a c t e a l s B breakdown of alcohol in the liver C building of proteins from amino acids D release of a hormone from a gland 10 The diagram shows the effect of an enzyme working in the human digestive system. What would reduce the rate of production of amino acids? A removing the amino acids as they are formed B increasing the amount of protein C raising the temperature to 40 °C D raising the pH to 7.5 11 The small intestines of cows are similar in general structure and function to the small intestines of humans. A disease in cows reduces the number of villi in their small intestines. The cows lose weight and become weak. What explains this? A less amylase produced B less peristalsis C less absorption of nutrients D slower digestion of proteins 492 trendyline

6 12 The diagram shows a piece of small intestine during peristalsis. What is happening at X? 13 The graph shows how the rate of photosynthesis varies with light intensity and temperatures. Other variables are kept the same. In which sections of the graph is light intensity limiting the rate of photosynthesis? A P and R B Q and S C R and Q D S and P 493 trendylineand Q nd nd P nd P

[Turn over 7 14 The diagram shows part of the trunk of a small tree with a ring of bark removed. Removing the ring of bark takes away phloem but leaves the xylem intact. What effect will removing the bark have on the two branches? 15 Which method could increase the rate of water uptake by a shoot? A c o v e r i n g t h e s h o o t w i t h a b l a c k p l a s t i c b a g B covering the shoot with a clear plastic bag C removing the leaves from the shoot D shining a bright light onto the shoot 494 trendyline

8 16 The list shows four metabolic processes. 1 carbon dioxide + water  glucose + oxygen 2 glucose  alcohol + carbon dioxide 3 glucose  lactic acid 4 glucose + oxygen  carbon dioxide + water Which of these processes occur in muscles? A 1 and 2 B 2 and 3 C 3 and 4 D 4 and 1 17 The table refers to blood vessels in the human body. W h a t a r e P, Q, R and S? 495 trendyline

[Turn over 9 18 The diagram shows a defect in the walls between the atria. W h a t e f f e c t w o u l d t h i s d e f e c t h a v e o n t h e b l o o d c i r c u l a t o r y s y s t e m ? A increased pressure in the pulmonary artery B irregular heart beat C reduced oxygen saturation of haemoglobin D ventricular systole is delayed 19 In the human breathing system, which features maintain the carbon dioxide gradient between the alveoli and the outside air? 1 b l o o d c o n t i n u a l l y p u m p e d t o t h e a l v e o l i 2 b r e a t h i n g i n a n d o u t・ 3 m o i s t a l v e o l a r s u r f a c e s・ 4 t h i n a l v e o l a r w a l l s A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 496 trendyline

10 20 The diagram represents the heart and some major blood vessels. What are possible blood pressures (in kPa) for the vessels shown on the diagram? 497