LIfe-Sciences-Grade-10-June-2022-QP-and-Memo_hlayiso.com_.pdf

{ KWAZULU-NATAL PROVINCE EDUCATION REPUBLIC OF SOUTH AFRICA NATIONAL SENIOR CERTIFICATE GRADE 10 « LIFE SCIENCES A i JUNE 2022 ‘ ; COMMON TEST : MARKS : 120 TIME: 2 Hours This question paper consist of 12 pages. Copyright reserved Please turn over

do wn l oa de d fr om st an m or ep hy si c Downloaded from hlayiso.com s. co m

do wn l oa de d fr om st an m or ep hy si c Downloaded from hlayiso.com s. co m

Downloaded from hlayiso.com Life Sciences Grade 10 June 2022 Common Test 1.1.5 Which of the following is the site of protein synthesis Golgi body Cell wall Ribosomes Plasma membrane iwkeks 2 1.1.6 The similarity between sclerenchyma and collenchyma tissue is that... A. They are both packaging tissues B_ They both contain flexible fibres C_ They both provide support to the plant D They both manufacture food 1.1.7 What is the magnification of the eye piece if the total magnification is 40x and the objective lens is 10x 4x 40x 15x 2x leek, 2x7 (14) Copyright reserved Please turn over

Downloaded from hlayiso.com 5 Life Sciences Grade 10 June 2022 Common Test 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 1.2.9) in your ANSWER BOOK 1.2.1. An organic compound made up of three fatty acids and one glycerol 41.2.2 The bones that protects the spinal cord 1.2.3 The knob of microscope that is used for final and clear focus of the object 1.2.4 Movement of molecules from a region of high concentration to lower concentration 1.2.5 The tissue that line kidney tubes and some glands 1.2.6 The tissue transport food from the leaves to all parts of the body 1.2.7 Membrane that surround a vacuole 4.2.8 Bones that surround and protect of the brain (9) 1.2.9 The Monomers of proteins 1x9 1.3 Indicate whether each of the statements 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 1.3.4) in the ANSWER BOOK. COLUMN | COLUMNII 1.3.1 The tissue that serves as a A: Collenchyma storage tissue B: Sclerenchyma 1.3.2 Connective tissue made up of A: Fibrous Connective tissue collagen fibres B: Loose connective tissue 1.3.3, Separatesxylem from phloem A: Pith B: Cambium 4.3:4 Opening at the base of the skull A: Foramen magnum B: Jaws 2x4(8) Copyright reserved Please turn over

Downloaded from hlayiso.com Life Sciences Grade 10 ° June 2022 Common Test 1.4. The table below shows the results of different food test. NUTRIENT TEST MATERIAL PRESENCE OF NUTRIENTS T lodine solution Blue-black Glucose U Vv WwW Ethanol White 1.4.1 Which nutrient was tested at: (a) T (b) W 1.4.2 Give ONE example of a monosaccharaide from the table above 1.4.3 State TWO functions of monosaccharide mentioned in QUESTION 1.4.2 1.4.4 What colour change is expected at V for positive test 1.4.5 Name the chemical reagent at U 1.4.6 What would be the colour change if T tested negative 1.4.7 State the nutrient which requires heat when tested Copyright reserved TOTAL SECTION A: Please turn over (1) (1) (1) (2) (1) (1) (1) (1) (9) (40)

Downloaded from hlayiso.com 7 Life Sciences Grade 10 June 2022 Common Test SECTION B QUESTION 2 2.1 The diagram below shows an animal tissue 2.1.1 Identify the tissue above (1) 2.1.2 Identify part B (1) 2.1.3 Give only the LETTER of the part that traps the dust in the above tissue (1) 2.1.4. Explain TWO ways in which the tissue mentioned in QUESTION 2.1.1 is structurally suited to perform its function (4) 2.2 Explain THREE adaptations of xylem tissue for its function (7) (6) [13] 2.3 Grade 10 learners conducted an investigation to determine the effect of different light intensities on the rate of transpiration in leaves: The following procedure was followed: 2 leafy shoot of the same plant were used The leafy shoots were of the same age The leafy shoots were then labelled leafy shoot A and leafy shoot B Leafy shoot A was exposed to different light intensities Leafy shoot B was placed in a dark area All others factors affecting transpiration rate were kept constant Potometer was used to measure the rate of transpiration in both groups The results of the investigation were recorded in every hour for each group eee, age Bee eee eee eee cee. Copyright reserved Please turn over

Downloaded from hlayiso.com 8 Life Sciences Grade 10 June 2022 Common Test The results for leafy shoot A are shown in the graph below Rate of transpiration (ml) w 5 10 15 20 25 Light intensities(Lux) 2.3.1 Identify: (a) Dependent variable (1) (b) Independent variable (1) 2.3.2 State the effect of increasing the light intensity on transpiration rate from 0 to 5 (1) 2.3.3 Explain why an increase in light intensity above 10 does not increase the rate 2 of transpiration (2) 2.3.4 List TWO ways in which learners could increase the reliability of the investigation (2) 2.3.5 List TWO factors affecting the rate of transpiration other than the one that was 2 investigated (2) 2.3.6 Explain why group B was included in the investigation (2) 2.3.7 State the conclusion for the above investigation i ) Copyright reserved Please turn over

Downloaded from hlayiso.com 9 Life Sciences Grade 10 June 2022 Common Test 2.4 The diagram below shows a phase of mitosis. A B c D 2.4.1 Identify the phase shown in the diagram above (1) 2.4.2 Give TWO visible reason for your answer (2) 2.4.3 Identify part: (a)A (1) (b) B (1) 2.4.4 State the LETTER and the NAME of the part that is not present in a plant cell (2) 2.4.5 Name and describe the events of the phase that appears before the (4) one shown in the diagram above 2.4.6 Give THREE biological importance of mitosis (3) (14) TOTAL QUESTION2 = [40] Copyright reserved Please turn over

Downloaded from hlayiso.com 10 Life Sciences Grade 10 QUESTION 3 3.1. The diagram below shows a part of a cell . June 2022 Common Test 3.1.1 Identify organelle: (a) C (b) D 3.1.2 Is the above cell a plant cell or animal cell? Give THREE visible reasons for your answer 3.1.3 State THREE functions of part A 3.1.4 Give the LETTER of the part that need to be in great numbers in a muscle tissue. Explain your answer. 3.1.5 Part D contains a pigment which essential for photosynthesis taking place in plants. Name the pigment and explain its role during photosynthesis Copyright reserved Please turn over (1) (1) (4) (3) (3) (3) (15)

Downloaded from hlayiso.com 11 Life Sciences Grade 10 June 2022 Common Test 3.2. The table below shows the percentage of blood that passes through various organs in the body per minute ORGANS Amount of blood flow (%) Liver 25 Brain 15 Small intestines 15 Kidneys 20 3.2.1 Draw a bar graph to represent the information shown in the table above (6) 3.2.2 Calculate the amount of blood that flows to other organs other than the one’s mentioned in the table. Show ALL your workings (3) 9 3.3. Tabulate TWO structural differences between an artery and vein a (14) 3.4 The diagram below shows a certain organic compound A on “ SD N oO 3.4.1 Give labels for: (a) M (1) (b) O (1) (c) P (1) Copyright reserved Please turn over

Downloaded from hlayiso.com 12 Life Sciences Grade 10 June 2022 Common Test 3.4.2 State the property of enzyme illustrated above 3.4.3 List TWO properties of enzymes other than the one mentioned in QUESTION 3.4.2 3.4.4. Explain why part P has broken 3.4.5 Hyperthermia is a condition where a body becomes overheated in response to prolonged hot, humid weather and can results to part N being denaiured.or damaged. Expiain the effects of part N in human body if it becomes denatured. TOTAL QUESTION 3 TOTAL SECTION B GRAND TOTAL Copyright reserved (1) (2) (1) (4) (11) (40) [80] [120]

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. com ` LIFE SCIENCES JUNE COMMON TEST MARKING GUIDELINE 2022 MARKS: 120 N.B This marking guideline consist of 8 pages.

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 2 com Life Sciences (Grade 10) June 2022 Marking Guideline PRINCIPLES RELATED TO MARKING LIFE SCIENCES 1. If more information than marks allocated is given Stop marking when maximum marks is reached and put a wavy line and 'max' in the right-hand margin. 2. If, for example, three reasons are required and five are given Mark the first three irrespective of whether all or some are correct/incorrect. 3. If whole process is given when only a part of it is required Read all and credit the relevant part. 4. If comparisons are asked for but descriptions are given Accept if the differences/similarities are clear. 5. If tabulation is required but paragraphs are given Candidates will lose marks for not tabulating. 6 If diagrams are given with annotations when descriptions are required Candidates will lose marks. 7. If flow charts are given instead of descriptions Candidates will lose marks. 8. If sequence is muddled and links do not make sense Where sequence and links are correct, credit. Where sequence and links are incorrect, do not credit. If sequence and links become correct again, resume credit. 9. Non-recognised abbreviations Accept if first defined in answer. If not defined, do not credit the unrecognised abbreviation but credit the rest of the answer if correct. 10 Wrong numbering If answer fits into the correct sequence of questions but the wrong number is given,it is acceptable. 11. If language used changes the intended meaning Do not accept. 12. Spelling errors If recognisable, accept the answer, provided it does not mean something else in Life Sciences or if it is out of context. Copyright reserved Please Turn over

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 3 com Life Sciences (Grade 10) June 2022 Marking Guideline 13. If common names are given in terminology Accept, provided it was accepted at the national memo discussion meeting. 14. If only the letter is asked for but only the name is given (and vice versa) 15. If units are not given in measurements Candidates will lose marks. Memorandum will allocate marks for units separately. 16. Be sensitive to the sense of an answer, which may be stated in a different way. 17. Caption All illustrations (diagrams, graphs, tables, etc.) must have a caption. 18. Code-switching of official languages (terms and concepts) A single word or two that appear(s) in any official language other than the learners' assessment language used to the greatest extent in his/her answers should be credited if it is correct. A marker that is proficient in the relevant official language should be consulted. This is applicable to all official languages. Copyright reserved Please Turn over

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 4 com Life Sciences (Grade 10) June 2022 Marking Guideline SECTION A QUESTION 1 1.1 1.1.1 D 1.1.2 B 1.1.3 A 1.1.4 D 1.1.5 C 1.1.6 C  1.1.7 A  2X6 (14) 1.2 1.2.1 Lipids /fats 1.2.2 Vertebral column /vertebrae 1.2.3 Fine adjustment knob 1.2.4 Diffusion 1.2.5 Cuboidal epithelium  1.2.6 Phloem 1.2.7 Tonoplast 1.2.8 Cranium 1.2.9 Amino acids 1x9 (9) 1.3 1.3.1 None   1.3.2 A only 1.3.3 B only 1.3.4 A only 2x4 (8) 1.4 1.4.1 (a) Starch  (1) (b) Fats/lipids (1) 1.4.2 Glucose (1) 1.4.3 They are source of energy They are energy storage molecules eg starch and glycogen (2) 1.4.4 red orange (1) 1.4.5 Benedict’s solution  /Fehling solution A and B (1) 1.4.6 Brown /take the colour of iodine solution (1) 1.4.7 Glucose (1) (9) TOTAL SECTION A: 40 Copyright reserved Please Turn over

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 5 com Life Sciences (Grade 10) June 2022 Marking Guideline SECTION B QUESTION 2 2.1 2.1.1 Ciliated columnar epithelium (1) 2.1.2 Nucleus (1) 2.1.3 A (1) 2.1.4 -Has goblet cells -That produces mucus to trap the germs/moisten the surface -Has cilia -Remove dust particles  (4) (Mark the first TWO only) (7) 2.2 -Cells are elongated/ joined end to end -Forming long, continuous tubes -cells are non-living/have no cell contents to enable the movement of water -Contained thickened / lignified walls to withstand pressure of water -Perforated with pits for lateral water transport  (Mark the first THREE only) 2x3 (6) (13) 2.3 2.3.1 (a) rate of transpiration in leaves (2) (b) Different light intensity (1) 2.3.2 It increased the rate of transpiration /remained constant 2.3.3 There might be other limiting factors that became in short supply (2) that led to no further increase in transpiration rate  2.3.4 Repeat the investigation Increase sample size Calculate the average  (Mark the first TWO only) (2) 2.3.5 Humidity Temperature Wind  (Mark the first TWO only) (2) Copyright reserved Please Turn over

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 6 com Life Sciences (Grade 10) June 2022 Marking Guideline 2.3.6 For control so that results can be compared (2) 2.3.7 The rate of transpiration increases with an increase in light intensity up to a point where it no longer increases (2) (13) 2.4 2.4.1 Anaphase  (1) 2.4.2 Spindle fibres had contracted Chromatids are pulling towards opposite poles (Mark the first TWO only) (2) 2.4.3 (a) cell membrane (1) (b) spindle fibre (1) 2.4.4 D – Centriole/Centrosome (2) 2.4.5 Metaphase* Chromosomes arrange themselves along the equator Chromosome attach to spindle fibres By centromeres (*compulsory + Any 3) (4) 2.4.6 - Responsible for growth and development - Responsible for asexual reproduction - Replacement of dead / lost cells - Repair of damaged cells / worn-out cells (Mark the first THREE only) (3) (14) TOTAL QUESTION 2 [40] QUESTION 3 3.1 3.1.1 (a) Golgi apparatus (1) (b) Chloroplast (1) 3.1.2 Plant cell * -Have large vacuole -Have chloroplast -Have cell wall (4) -Have fixed shape  (Mark *compulsory + first THREE only) 3.1.3 Protects the inner parts of the plant cell Gives plant cells a regular shape (3) Provide support to the plant body Copyright reserved Please Turn over

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 7 com Life Sciences (Grade 10) June 2022 Marking Guideline (Mark the first THREE only) 3.1.4 B/ mitochondria provides energy ,for contraction of musclesfor (3) movement 3.1.5 - chlorophyll* -which traps the radiant energy from the sun -and use this energy to produce sugars during photosynthesis (3) (*compulsory + Any 2) (15) 3.2 3.2.1 Percentage amount of blood flow passes different organs 30 25 Amount of blood flow (%) 20 15 10 5 0 Liver Brain small intestine kidneys Different organs Marking criteria: Features Mark allocation Caption ( C) 1 Correct type of graph (T) 1 Correct labels on X-axis and Y- 1 axis with units (L) Correct scale on X-axis and Y- 1 axis with equal width and equal spaces between bars (S) Correct plotting (P) 1-3 bars plotted correct:1 All 4bars plotted correct:2 (6) 3.2.2 (25+15+15+20) = 75 100 - 75= 25% (3) (9) Copyright reserved Please Turn over

Downloaded from hlayiso.com Downloaded f rom St anmorephysics. 8 com Life Sciences (Grade 10) June 2022 Marking Guideline 3.3  Artery Vein Has thick outer walls Has thin outer walls Has thick layer of muscle Has thin layer of muscles and fibres and elastic fibres elastic fibres Has small lumen (space)  Has large lumen (space)  No valves present Valves are present (Mark the first TWO only+ 1 for the table) (5) (14) 3.4 3.4.1 (a) substrate molecule (1) (b) enzyme-substrate molecule (1) (c) products (1) 3.4.2 Enzymes are specific to the reaction they catalyse (1) 3.4.3 -Enzymes are sensitive to temperature -Enzymes are sensitive to pH -Enzymes can be used repeatedly (2) (Mark the first TWO only) 3.4.4 To show that the enzyme has catalysed/acted on the substrate molecule (1) 3.4.5 When part N/ enzyme become denatured, it loses its shape Making it fail to bind with substrate molecule That will prevent biochemical reactions to occur at faster rate Leading to malfunctioning of the body That can even lead to death  Any (4) (11) TOTAL QUESTION 3 (40) TOTAL SECTION B (80) GRAND TOTAL [120] Copyright reserved Please Turn over