Life Sciences Grade 10 KwaZulu Natal June 2018 Paper & Memo

Downloaded from hlayiso.com education | Department: Education PROVINCE OF KWAZULU-NATAL | NATIONAL | SENIOR CERTIFICATE GRADE 10 LIFE SCIENCES ' COMMON TEST JUNE 2018 | MARKS: 150 TIME: 2% hours This question paper consists of 15 pages. |

Life Sciences Downloaded from hlayiso.com June 2018 Common Test Grade 10 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 4, 2. 10. 11. Answer ALL the questions. Write ALL the answers in the ANSWER BOOK. Start the answers to each question at the top of a NEW page. Number the answers correctly according to the numbering system used in this question paper. Present your answers according to the instructions of each question. Do ALL drawings in pencil and label them in blue or black ink. Draw diagrams, tables or flow charts only when asked to do so The diagrams in this question paper are NOT necessarily drawn to scale. Do NOT use graph paper. You may use a non-programmable calculator, protractor and a compass. Write neatly and legibly.

Downloaded from hlayiso.com Life Sciences 3 June 2018 Common Test Grade 10 SECTIONA QUESTION 1 144 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A to D) next to the question number (1.1.1 to 1.1.8) in the ANSWER BOOK, for example 1.1.9 D. 1.44 1.1.4 Which ONE of the following is a meristematic tissue? A Epidermis B Cambium C Parenchyma D ~— Sclerenchyma In which phase does DNA replication take place? A Metaphase B Prophase C Telophase D Interphase Striated muscle tissue is found .. in the walls of the heart. in voluntary muscles. lining the blood vessels. lining the intestine walls. UNOWLY The foramen magnum is found at the base of the ... A upper limb. B lower limb. C vertebral column D skull Which ONE of the following compounds is normally found in the cell wall of a plant cell? A Fat B Cellulose C Glucose D Amino acid

Life Sciences Downloaded from hlayiso.com June 2018 Common Test Grade 10 1.1.6 Below is a list of tissues. (i) Squamous (ii) Ciliated columnar (iii) Muscle Which ONE of the following most likely represents the order of tissues containing the highest to the lowest number of mitochondria? VOU> > 3 2. QUESTIONS 1.1.7. AND 1.1.8 REFER TO THE FOLLOWING INVESTIGATION ON PULSE RATE. An investigation was conducted to determine the effect of exercise on pulse rate. The procedure was as follows: One person was used The investigation was done on 3 days On each of these 3 days: - The person followed the same diet - The person exercised for 10 minutes - The pulse was recorded 5 minutes before exercise and 5 minutes after exercise - Averages were calculated for the three days 1.1.7. Which ONE of the following increased the reliability of the investigation? Exercising for 10 minutes Using one person in the investigation Using an average of 3 readings Keeping the diet the same for all 3 days UQWPY 1.1.8 Which ONE of the following will be a suitable hypothesis for the above investigation? To determine the effect of exercise on pulse rate Exercise will increase the pulse rate Exercise caused an increase in the pulse rate To determine the effect of diet on pulse rate 0aOwPY (8x2) (16)

Downloaded from hlayiso.com Life Sciences 6 June 2018 Common Test Grade 10 1.2 Give the correct biological term for each of the following descriptions. Write only the term next to the question number (1.2.1 to 1.2.10) in the ANSWER BOOK. 1.24 Part of the skeleton made up of the skull, vertebral column, ribs and sternum 1.2.2 The triangular bone that forms the shoulder blade 1.2.3 An organelle within the cell where proteins are synthesised 1.2.4 The part of the skull that contains and protects the brain 1.2.5 A type of involuntary muscle found only in the heart 1.2.6 The muscles found between the ribs of a mammal 12,0 The first vertebra that connects the neck to the skull 1.2.8 A group of cells that have more or less the same structure and perform the same function 129 A structure that joins chromatids together 1.2.10 Aprocess during which identical copies of DNA is formed (10 x 1) (10) ded Indicate whether each of the descriptions in COLUMN | applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II. Write A only, B only, both A and B, or none next to the question number (1.3.1 to 1.3.3) in the ANSWER BOOK. COLUMN | COLUMN II 1.3.1 A bone of the pectoral girdle A Pubis B Scapula 1.3.2 A moveable joint A Hinge B__ Gliding 1.33 Joins bone to bone A Ligaments B Tendons (8x2) (6)

Downloaded from hlayiso.com Life Sciences 6 June 2018 Common Test 1.4 Grade 10 Study the diagram below. Give the LETTER and the NAME of the: 1.4.1. Specialised cell in which photosynthesis takes place 1.4.2 Part through which transpiration takes place 1.4.3. Organelle that contains chlorophyll

Downloaded from hlayiso.com Life Sciences 7 June 2018 Common Test Grade 10 1.5 Diagrams W, X, Y and Z below represent different cell organelles. Give the LETTER and the NAME of the organelle that: 1.5.1. Contains cristae 1.5.2 Controls cell activities 1.5.3. Actas acommunication system 1.5.4 Isaplastid 1.6 Write down the correct name of the phase of mitosis during which: 1.6.1 Cytokinesis is completed 1.6.2 The chromatin network unwinds 1.6.3 The chromatids are pulled towards opposite poles 1.6.4 The chromosomes are arranged at the equator TOTAL SECTION A:

Downloaded from hlayiso.com Life Sciences 8 June 2018 Common Test Grade 10 SECTION B QUESTION 2 2.4 The diagram below represents the pectoral girdle 2.1.1 Identify: (a) The type of joint at A (1) (b) Bone B (1) 2.1.2 Different types of muscles are found on either side of bone B. Explain how these muscles work together to allow for movement of the arm. (3) 2.1.3 Ligaments join bone B to bone D. Explain why you would expect ligaments to be made of yellow elastic tissue rather than white fibrous tissue. (3) 2.1.4 Name the disease that affects the joint at C when the cartilage breaks down. (1) 2.1.8 Describe the disease that you mentioned in Question 2.1.4. (2) 2.1.6 Name the mineral that may cause osteoporosis if it is in short (1) supply. (12)

Downloaded from hlayiso.com Life Sciences 9 June 2018 Common Test Grade 10 22 Diagrams A, B and C below represent three types of blood vessels. Smooth muscle layer a, Diagram A Diagram B Diagram C 25 22:4 Identify the type of blood vessel in: (a) Diagram B (b) Diagram C 22:2 Explain why the blood vessel in Diagram A has a thicker smooth muscle layer. 2.2.3 Explain ONE structural adaptation of the blood vessel in Diagram C. 2.2.4 Tabulate TWO differences between the composition of blood in the pulmonary artery and in the pulmonary vein. Explain TWO structural adaptations of ciliated columnar epithelial cells for its function. (5) (11) (4)

Life Sciences 10 2.4 2.5 Downloaded from hlayiso.com June 2018 Common Test Grade 10 An onion cell was placed in a beaker containing a strong salt solution. It was noticed that after a few hours, the size of the vacuole was reduced. 2.4.1 Describe the process that is responsible for the decrease in the size of the vacuole. 2.4.2 Explain how active transport/absorption differs from the process described in Question 2.4.1. 2.4.3 Give ONE reason why the cell wall of the onion cell will not be affected by the strong salt solution. The diagram below represents a cell formed during telophase of mitosis in an animal. 2.5] Draw a labelled diagram to show the cell above during metaphase of mitosis. 2iOvd How many chromosomes were present in the original cell which gave rise to the cell represented in the diagram above? (1) (7) (1) (6) [40]

Life Sciences 11 June 2018 Common Test Grade 10 QUESTION 3 3.1 Study the extract and the table below. Downloaded from hlayiso.com VEGETABLES THAT CONTAIN PROTEINS AND CARBOHYDRATES Beans and other legumes are such good sources of proteins that you can count them toward either your recommended protein servings or your recommended vegetable servings. Different types of beans and legumes such as a cup of canned navy beans, a cup of canned great northern beans and other legumes with at least 15 grams of proteins per cup include chickpeas, kidney beans and black beans. The table below shows the protein and the carbohydrate content in different vegetables. VEGETABLE TYPE PROTEINS (g) CARBOHYDRATES (g) ee CKD) 17 55,4 Chickpeas a 15 0,0 Kidney beans 15 0,0 3.4.1 Which TWO bean types in the extract other than northern beans, consist of proteins? 3.1.2 Which vegetable type will be highly recommended for a patient lacking energy? outs Give a reason for your answer in Question 3.1.2. 3.1.4 Determine the ratio of protein : carbohydrate in navy beans. Round of your answer to two decimal places. 3.1.5 Draw a bar graph to represent the protein content in the different vegetables.

Downloaded from hlayiso.com Life Sciences 3.2 12 Grade 10 June 2018 Common Test A group of Grade 10 learners set up the apparatus shown below to investigate the effect of temperature on the rate of transpiration. This investigation was done three times. Leafy shoot Reservoir Air bubble Capillary tube ; “ Beaker with water ——~ (2) 3.2.1 Identify the apparatus shown above. 3.2.2 For this investigation identify the: (a) Independent variable (b) Dependent variable 3.2.8 Explain why the leafy shoot should be cut underwater. 3.2.4 Explain the purpose of the air bubble. 3.2.5 What is the purpose of the water in the reservoir? 3.2.6 State ONE way in which the Grade 10 learners ensured the reliability of this investigation. 3.2.7 State TWO factors that should be kept investigation. constant in this

Life Sciences 3.3 Downloaded from hlayiso.com 13 Grade 10 The diagrams below represent plant tissues. June 2018 Common Test Diagram | Diagram Il Diagram Ill ce 3.3:2 3:3:3 3.3.4 Identify the tissue in: (a) Diagram | (b) Diagram Ill Explain ONE consequence if the holes of the sieve plates in the tissue in Diagram II become blocked. Explain TWO structural adaptations of the cells in the tissue in Diagram | Explain ONE structural adaptation of the cells in the tissue in Diagram Ill. (4) (2) (10)

Downloaded from hlayiso.com Life Sciences 14 June 2018 Common Test Grade 10 3.4 Diagrams A, B and C below represent a property of enzymes. Ce 7 , Diagram A Diagram B Diagram C 3.4.4 Which property of enzyme is illustrated in the diagram above? 3.4.2 Identify: (a) Diagram B (b) PartX 3.4.3 State TWO properties of enzymes other than the one represented by the diagram above. 3.4.4 Give TWO ways in which enzymes are biologically important in industry. TOTAL SECTION B: (2) (7) [40] 80

Downloaded from hlayiso.com Life Sciences 15 June 2018 Common Test Grade 10 SECTION C QUESTION 4 Essential substances must be transported to all parts of a plant or animal. Describe the absorption of water by a root hair of a plant and how this water moves laterally across the root to the xylem. Also describe the events of the cardiac cycle that moves blood containing oxygen and glucose through the human body. Content: (17) Synthesis: (3) (20) NOTE: NO marks will be awarded for answers in the form of tables, flow charts or diagrams. TOTAL SECTION C: 20 GRAND TOTAL: 150

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Downloaded from hlayiso.com basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 10 ADARSASSASAS ERAS ARASS AS AS SAO R BABAR ARRAS, LIFE SCIENCES JUNE 2018 COMMON TEST MEMORANDUM This memorandum consists of 7 pages. { | MARKS: 150 |

Life Sciences SECTION A QUESTION 1 1.1 111 1.1.2 1.1.3 1.1.4 1.1.5 1.1.6 1.1.7 1.1.8 1.2 1.2.1 1.2.2 1.2.3 1.2.4 1.2.5 1.2.6 1.2.7 1.2.8 4.2.9 4.2.10 1.3 1.3.4 4.3.2 13.38 1.4 14d 1.4.2 1.4.3 1.5 144 1.5.2 1.5.3 1.5.4 1.6 Copyright reserved DHOD ROD = Downloaded from hlayiso.com 2 June 2018 Grade 10 - Memorandum BY Y Dvv py v (Ae Div BYY oy Cvv BYY (8x2) Axial skeleton ScapulaY Ribosome” Craniumv Cardiac’ muscle + aa . intercostal” muscles />4-Let <2 onl Atlas” Tissue” Centromere” Replication” (10 x 1) B only” Both A and BYY j A onlyy ¥ (3 x 2) AY Guard cell, CY Stomay /S7* natcn EY Chloroplast” ZY Mitochondrion” Xv NucleusY Yv Endoplasmic reticulum” Wv Chloroplast’ Telophasev Prophasew Anaphase¥ MetaphasevY TOTAL SECTION A: (16) (10) SSHS SSESS [NENA ee: 50 Please turn over

Life Sciences SECTION B QUESTION 2 2.1 2.1.4 2.1.3 2.2) 224 2.2.2 2.2.3 Copyright reserved L dioxidew dioxidev Downloaded from hlayiso.com 3 June 2018 Grade 10 - Memorandum (b) Humerus¥ (1) - They work antagonisticallyY - When one contractsY - the other relaxes” (3) - Yellow elastic tissue enables ligaments to stretchy’ prone ot Jost” - allowing bones to move in different directionsy / flexes p ek jew - White fibrous tissue has non-elastic fibresv - which make it unable to stretchy Any (3) Arthritisw (1) i Jootkr | 2 - Bones rub together’ / fret / - causing pain/and inflammation’ /- «~¢ oA” (2) { Calcium’ (1) (12) (a) VeinY (1) (b) CapillaryY (1) - To withstand the high pressure” - created by the pumping of the heart’ (2) aot , f ee Whew i Abies ee - Single layer of cellsv ov 3 / ~ to allow oxygen and nutrients to diffuse’ into the tissues“ /CO2 and excretory waste to diffuse from the tissues (2) Pulmonary artery Pulmonary vein ? Low concentration of oxygen” _| High concentration of oxygen” lednye ies High concentration of carbon Low concentration of carbon = High concentration of glucosev_| Low concentration of glucose” Low concentration of metabolic | High concentration of metabolic wastew” wastev’ Table (1) and (Any 2 x 2) (5) (11) Please turn over

2.3 Downloaded from hlayiso.com Life Sciences 4 June 2018 Grade 10 - Memorandum - They have goblet cells” - secreting mucus to trap dust” - Have cilia” . : - which beat to remove dust /mver/ #12feee~ (2x2) (4) joremut f\ lio f vas podinke? “ 2.4 2.5 Copyright reserved her & DPA iw oS Ati Of A hy 2.4.1 - Water molecules moved from th Jonlon cellv - where there was a higher concentration of water” - to the strong salt solution in the beaker” - across a differentially permeable membranev (4) 2.4.2 - Substances move against a concentration gradient¥ - using energy” / heel £ bape Cane. * (2) 2.4.3 Cell wall is rigidv’ (1) (7) 25/4 nnn Centriole SL : ie * Centromere-~ <a Chromosome” ae ; |__ Chromatid Spindle fibre Cytoplasm Cell membrane Metaphase MARK ALLOCATION FOR DIAGRAM 2 chromosomes represented each 4 with 2 chromatids) (N) Chromosomes in middle (C) 1 Any THREE correct labels 3 Total 5 (5) 2.5.2 av (1) (6) [40] Please turn over

Life Sciences QUESTION 3 3.1 3.1.1 Copyright reserved Downloaded from hlayiso.com 5 June 2018 Grade 10 - Memorandum - Navy beans” - Kidney beans” - Black beans¥ Northern beans¥ a Has most carbohydrates” mu: 1:1,77V¥v Any 199 Protein content in different vegetables ¥ co 179 TY Pyv Protein content (g) S a 15g 159 Navy beans Northern beans — T Chickpeas Kidney beans Vegetables LY Mark aliocation of the graph | Criteria Marks | Bar graph drawn (T)_ 1 Title of graph (including both variables) 1 Correct scale for X-axis (equal width and spacing of the bars) and Y-axis (S) 1 Correct label and unit for X- axis and Y-axis (L) 1 Plotting of the bars (P) 0: No bars plotted correctly 1: 1 to 3 bars plotted correctly 2: All 4 bars plotted correctly (8) (12) Please turn over

Life Sciences 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.3 3.3.4 ies} we ~ 3.4 3.4.4 3.4.2 3.4.3 3.4.4 Copyright reserved Downloaded from hlayiso.com 6 June 2018 Grade 10 - Memorandum PotometerY (1) (a) TemperatureY (1) (b) Rate of transpiration” ‘| - To prevent air from entering” - and blocking the xylem vessels” (2) es ed ar cd wath - To measure the rate of absorptiony “4b <7 “ wad of yo’ -which indicates the rate of transpiration” /e Shes Maesetees ( (2) To move the air bubble back¥ (1) They did the investigation three times” /repeated the investigation (1) - Same apparatus” /potometer - Same light intensity” /wind/humidity Hewp - Same person” to conduct investigation Any (2) (Mark first TWO only) (11) {a} Parenchyma” ) (b) Collenchymav ) -No movement of maaan one cell to the other” - amd 0 food front leaves to other plant parts” (2) fF - Has thin cell wall” ‘al GO), gitne allowing movement of water and mineral salts” - Has large vacuole” to store water” un? - Has(argé)intercellular air space” [nme A fale ta allow gaseous exchangeY © Any (4) (Riark first TWO oniy) - Has thick cell wall” tht f eo™ - for strength and supportY (2) (10) Enzymes work on a specific substrate only”/ enzymes are specific (1) (a) Enzyme-substrate complex¥ (1) (b) ProductsY 1 - Enzymes are sensitive to temperature vetmye - Enzymes are sensitive to pHY «here (2) Tenderising meaty floducany Cotta fe Bas - Removing hair” anodes bely food’ - Making beer” /wine/ vinegar/ chocolates/ syrups | Yegint . - Washing powders” Any (2) (Mark first TWO only) (7) [40] TOTAL SECTION B: 80 Please turn over

Downloaded from hlayiso.com Life Sciences SECTION C QUESTION 4 7 Grade 10 - Memorandum Absorption and lateral movement of water to the xylem - The water potential of the soil solution is higher” — than that of the cell sapvof the root hair. - Water moves from the soil solution by the process of osmosis¥ - through'the cell wall” - and the differentially permeable cell membranev - and the cytoplasm” - into the vacuolev of root ha - The water poteniial of root hair increases¥ - andis higher than that of the adjacent cortical cellsv *+- Water diffuses‘afong a water potential gradientis via intercellular air spaces¥ o> — orinternaily along the cell wails thee hl for" 2 ¥ - of the cortical cellsw ir bee a ceiler - through the endodermis”/ info the xylem f Cardiac cycle that moves bicod containing oxygen - Atrial systoie”/both atria contract at the same time - The tricuspid and bicuspid valves open” - Blood flows from the atria into the ventricles” Ventricutar systole”/both ventricles contract at the same time - Both semi-lunar valves open” - Blood is forced trem the right ventricle into the pulmonary artery” - and from the left ventricle into the aortaw - General diastole /heari relaxes - Tricuspid and bicuspid valves openy, - Blood enters the right atrium from the inferior and superior vena cavav - and blood enters tne left atriurn from the pulmonary veinw” ASSESSING THE PRESENTATION OF THE ESSAY why vened June 2018 dig Ce (Any) (9) \\ 4 (Any 8) 48) Content: (17) Synthesis: (3) (20) Relevance Logic sequence Comprehensive All information provided is relevant to the question Ideas arranged in a logical cause- effect sequence Answered all aspects required by the essay in sufficient detail All the information provided is relevant to the - Absorption and lateral movement of water to the xylem All the information regarding the: - Absorption and lateral movement of water to the xylem - Cardiac cycle (oxygen) At least the following points should be included: - Absorption and lateral movement of water to the xylem - Cardiac cycle (oxygen) Is arranged in a logical manner (7/11) There is no irrelevant information - Cardiac cycle (oxygen)(4/6) 1 mark 1 mark 1 mark TOTAL SECTION C: 20 GRAND TOTAL: 150 Copyright reserved Please turn over

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