Untitled Deck

Question 2

Q1: What do plant cells have that animal cells do not?

Question 3

A1: Cell wall

Answer 3

chloroplasts

Question 5

Q2: What is the function of the mitochondria?

Question 6

A2: It is the site of aerobic respiration

Answer 6

which releases energy.

Question 8

Q3: Describe how to prepare an onion cell slide.

Question 9

A3: Peel onion skin

Answer 9

place on slide

Question 11

Q4: Why do we use stains like iodine in microscopy?

Question 12

A4: To highlight structures (e.g.

Answer 12

nucleus

Question 14

Q5: What is mitosis and its purpose?

Question 15

A5: Mitosis is cell division to produce two identical daughter cells for growth and repair.

Question 17

🫀 B2: Organisation Flashcards

Question 18

Q6: What are enzymes and what do they do?

Question 19

A6: Enzymes are biological catalysts that speed up reactions in the body.

Question 21

Q7: What is the ‘lock and key’ model of enzyme action?

Question 22

A7: The enzyme’s active site fits a specific substrate like a key fits a lock.

Question 24

Q8: What happens to enzymes at high temperatures or the wrong pH?

Question 25

A8: They become denatured; the active site changes shape and can’t bind the substrate.

Question 27

Q9: Describe how to test the effect of pH on amylase.

Question 28

A9: Mix starch and amylase with buffer of different pH

Answer 28

test with iodine until no starch remains.

Question 30

Q10: What is the function of bile in digestion?

Question 31

A10: It emulsifies fats and neutralises stomach acid to help enzyme action in the small intestine.

Question 33

🦠 B3: Infection and Response Flashcards

Question 34

Q11: Name the four main types of pathogens.

Question 35

A11: Bacteria

Answer 35

viruses

Question 37

Q12: How do vaccines protect us?

Question 38

A12: They stimulate white blood cells to produce memory cells and antibodies.

Question 40

Q13: Why don't antibiotics work on viruses?

Question 41

A13: Viruses reproduce inside cells

Answer 41

and antibiotics can't target them without damaging our cells.

Question 43

Q14: What are the three ways white blood cells fight infection?

Question 44

A14: Phagocytosis

Answer 44

producing antibodies

Question 46

Q15: Why is it important to finish a full course of antibiotics?

Question 47

A15: To ensure all bacteria are killed and prevent resistant strains from surviving.

Question 49

🌿 B4: Bioenergetics Flashcards

Question 50

Q16: What is the word equation for photosynthesis?

Question 51

A16: Carbon dioxide + water → glucose + oxygen.

Question 53

Q17: Name three factors that affect the rate of photosynthesis.

Question 54

A17: Light intensity

Answer 54

CO₂ concentration

Question 56

Q18: Describe a test to measure photosynthesis using pondweed.

Question 57

A18: Count oxygen bubbles from pondweed under different light distances.

Question 59

Q19: What is respiration and where does it happen?

Question 60

A19: It's the process of releasing energy from glucose

Answer 60

mainly in the mitochondria.

Question 62

Q20: What is the difference between aerobic and anaerobic respiration?

Question 63

A20: Aerobic uses oxygen; anaerobic does not and produces less energy.

Question 65

🧪 Food Tests Flashcards (Practicals)

Question 66

Q21: Test for starch and its result?

Question 67

A21: Add iodine. Blue-black colour = starch present.

Question 69

Q22: Test for glucose and its result?

Question 70

A22: Add Benedict’s solution and heat. Green/yellow/red = sugar present.

Question 72

Q23: Test for protein and its result?

Question 73

A23: Add Biuret solution. Purple colour = protein present.

Question 75

Q24: Test for lipids and its result?

Question 76

A24: Mix with ethanol

Answer 76

then water. Cloudy layer = lipids present.