AES 2019 Bio Prelim P1 QP

Name: ............................................................. ( ) This Question Paper consists of 17 printed pages including this page. [Turn over ASSUMPTION ENGLISH SCHOOL PRELIMINARY EXAMINATION 2019 BIOLOGY 6093 / 01 ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL LEVEL: Sec 4 Express DATE: 2 September 2019 CLASS: Sec 4/2 DURATION: 1 hour Additional Materials provided: 1 sheet of OAS paper INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your NAME and INDEX NUMBER at the top of this page and on the OAS paper. Shade your index number on the OAS paper. PAPER 1 (40 marks) MULTIPLE CHOICE QUESTIONS There are 40 questions in this paper. Answer all questions. For each question, there are four possible answers A, B, C and D. At the end of the examination, hand in your OAS paper and question booklet separately. www.KiasuExamPaper.com 3

2 6093/01/4E/PRELIMS/19 MULTIPLE-CHOICE QUESTIONS [40 marks] For each question, there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in t he OAS paper provided. 1 Four statements about mitochondria are listed as shown. Which statements are correct? 1 Detoxification of metabolic waste takes place in the mitochondria. 2 The main function of mitochondria is to synthesise proteins. 3 There is a high concentration of mitochondria in root hair cells to assist the roots to take in water. 4 There is a lower concentration of oxygen in the mitochondria as compared to the cytoplasm near the cell membrane. A 1 and 2 only B 1, 3 and 4 only C 3 and 4 only D 4 only 2 Which sequence shows the correct order of increasing size and complexity? A cells Æ organelles Æ organs Æ tissues Æ systems B cells Æ tissues Æ organelles Æ organs Æ systems C organelles Æ cells Æ tissues Æ organs Æ systems D tissues Æ cells Æ organs Æ organelles Æ systems 3 What can be found in a mature red blood cell? A antibodies and mitochondria B carbonic anhydrase and cell membrane C cell membrane and nucleus D haemoglobin and fibrinogen www.KiasuExamPaper.com 4

3 6093/01/4E/PRELIMS/19 [Turn Over 4 Which is an example of diffusion in a plant? A carbon dioxide from the air moving into a photosynthesising leaf B minerals in xylem moving up the stem to leaves C sugars in phloem moving from leaves to roots D water in xylem moving from roots to leaves 5 The figure shows four sections of the mustard green stem before and after immersion in solutions P, Q, R and S of different sugar concentrations. stem before immersion Which sequence shows the correct concentrations of the four solutions? highest concentration lowest concentration AP S R Q BQ P S R CQ R S P DR S P Q waxy cuticle solution Ssolution Qsolution P solution R www.KiasuExamPaper.com 5

4 6093/01/4E/PRELIMS/19 6 Which element in the molecule of urea shows that it is formed f rom amino acids and not from glucose? A carbon B hydrogen C nitrogen D oxygen 7 Potato contains a nutrient which is broken down by amylase when inside the human alimentary canal. Which test would detect this nutrient? A Benedict’s test B biuret test C ethanol emulsion test D iodine test 8 In an experiment, 15 g of boiled egg white was mixed with protea se solution. After 1 hour at 15 °C, 5 g of protein was digested. The experiment was repeated at 25 °C and again at 60 °C. How much protein was broken down in the second and third experiments respectively? experiment 2 (at 25 °C) experiment 3 (at 60 °C) A 5g 0g B 5g 1 0g C 10 g 0 g D 10 g 15 g www.KiasuExamPaper.com 6

5 6093/01/4E/PRELIMS/19 [Turn Over 9 The diagram below shows the effect of pH on the activity of four different enzymes. Which pair of enzymes includes one that is not affected by pH a nd one that is from the stomach? AP and Q BP and S CQ and R DR and S 10 The diagram shows the human alimentary canal with labels for th e functions of some of its parts. Which label is correct? P A Q R S B C D www.KiasuExamPaper.com 7

6 6093/01/4E/PRELIMS/19 11 Which section of the diagram represents the function of the liver? 12 The diagram shows the apparatus used to investigate oxygen prod uction from an aquatic plant. The experiment was repeated several times to calculate the volu me of oxygen produced. Which two factors must be kept constant in each repeat experiment? A the size of aquatic plant and the amount of oxygen in the measuring cylinder B the size of aquatic plant and time exposed to the light C the size of the beaker and the size of the funnel D the volume of water in the beaker and the height of the measuring cylinder A D C B www.KiasuExamPaper.com 8

7 6093/01/4E/PRELIMS/19 [Turn Over 13 The photomicrograph shows a section through the lower half of the leaf. Which region will have the lowest carbon dioxide concentration when t he plant is exposed to light? 14 The diagram shows part of a transverse section of the stem of a plant. Which region is the xylem tissue? 15 A plant is exposed to different temperatures and humidities. Wh ich set of conditions causes the plant to lose the least water? temperature / °C humidity / % A 15 30 B 15 60 C 25 30 D 25 60 A B C D A B C D www.KiasuExamPaper.com 9

8 6093/01/4E/PRELIMS/19 16 The diagram shows a section through the heart. When X and Y are undergoing systole, which valves are opened and which are closed? valves 1 and 2 valves 3 and 4 A closed closed B closed opened C opened closed D opened opened 17 Which is the shortest route that can be taken by blood travelling from a leg to an arm in the body? A leg J heart J lungs J heart J arm B leg J liver J heart J lungs J arm C leg J lungs J heart J liver J arm D leg J lungs J heart J lungs J arm www.KiasuExamPaper.com 10

9 6093/01/4E/PRELIMS/19 [Turn Over 18 The diagram shows a section through an alveolus and a blood capillary. In which region is the concentration of oxygen highest? 19 The diagram shows the short-term effect of smoking on heart rat e. Which substance in cigarette smoke is the main cause of the change in heart rate between 10 and 18 minutes? A carbon dioxide B carbon monoxide C nicotine D tar wall of alveolus blood returns to the heart capillary wall red blood cells blood from heart D A B C www.KiasuExamPaper.com 11

10 6093/01/4E/PRELIMS/19 20 The table shows the flow rate and concentration of protein and urea in the blood vessel leading into a kidney glomerulus in a healthy person. Total flow rate / cm3 min-1 Concentration / g per 100 cm3 Protein Urea 1000 7.40 0.03 What are the correct figures for the fluid in the collecting duct? Total flow rate / cm3 min-1 Concentration / g per 100 cm3 Protein Urea A 10 0.00 1.75 B 10 7.40 0.03 C 1000 0.00 1.75 D 1000 7.40 0.03 21 Which response is not due to homeostasis? A enlargement of iris B increase in glucose production when blood glucose level is low C increase in permeability of collecting duct of kidney tubules D shivering in cold weather 22 Which statement about voluntary actions is not true? A Motor neurones are always involved in transmitting impulses to effectors. B Relay neurones will transmit nerve impulses to the motor neurons. C Sensory neurones will always send nerve impulses to the brain. D Voluntary actions are always coordinated by the brain. www.KiasuExamPaper.com 12