Problem Solving  Answers 1. How many cells under the microscope? 2. What is the average length of each cell? 3. How many cells under the microscope? 4. What is the average length of each cell? 6 9 300 units 180 units 300 / 6 = 50 units 180 / 6 = 30 units 5. What type of cells are shown above? 6. Name 3 parts NOT shown in the cell above, but would be found in a plant cell 7. The above cells underwent cell division and make 2 new cells every 30 minutes. How many new cells would be made after a) 2 hours and b) 3 hours? Animal cells Chloroplasts, cell wall and vacuole 16 cells 64 cells

Problem Solving  Answers Person Age (years) DNA Sample given? Type of DNA sample Jane 46 Yes Saliva Steve 38 Blood Natasha 36 No / Which person provided a blood DNA sample? Calculate the average age of the people in table DNA profiling has many uses. Which person from the table would be involved in paternity testing? Why is paternity testing carried out? Why could the police not rule out Natasha as a suspect in a crime during a forensics investigation? Name another use of DNA profiling Where are a) DNA b) genes and c) chromosomes found? What is the function of DNA? Why is DNA used in DNA profiling? Steve 46+38+36 = 120 120 / 3 = 40 years old Steve To identify who the father is She did not give a DNA sample Assessing future health risks All are found in the nucleus To carry instructions to make proteins DNA is unique to each person

Problem Solving  Answers C D A = bacterium B = yeast C = yeast D = bacterium Identify each type of cell above Name 2 useful products that can be made by cells A and D Name 3 useful products that can be made by cells B and C Name 2 chemicals that can be used to decrease the growth of cells A and D Why properties do micro-organisms like the ones above have that make them useful in different industries? Cheese, yoghurt Wine, beer, bread Antibiotics AND disinfectants / bleach / antibacterial cleaners 1. They grow rapidly and 2. they have a diverse use of food sources

Problem Solving  Answers 1. How much sugar is produced when the plant is 12 days old? 2. How old is the plant when it makes 16g of sugar? For Qs 3 and 4, choose from INCREASE, DECREASE or STAY THE SAME as your answer. 3. Predict what you think will happen to the units of sugar produced on day 30. 4. State what will happen to the units of sugar produced if the plant no longer received light. 4 g 18 days old Units of sugar produced (g) It will increase Age of plant (days) It will decrease