Starter: B1 recap Bacteria & Yeast 4/28/2017 Name 3 bacteria

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Presentation transcript:

Starter: B1 recap Bacteria & Yeast 4/28/2017 Name 3 bacteria Why are not all bacteria pathogens? Explain how bacteria can be killed by antibiotics Give one way a bacterium is different to a human cell. CAF: uses of bacteria B1 recap

Recap: Bacteria Bacteria have no nucleus Uses Making yoghurt Making cheese Good bacteria in our gut help with digestion Making medicines e.g. penicillin Bacteria have no nucleus DNA is circular and free in the cytoplasm Rings of DNA called plasmids carry extra genetic info Flagella (tails) allow the bacteria to move The slime capsule protects the bacteria Cell membrane Slime capsule Cell wall Cytoplasm Genetic material Plasmids Flagella

Yeast Is YEAST an animal or a plant cell? JUSTIFY your answer. Food storage granule Cytoplasm Cell membrane Cell wall Vacuole Nucleus

Yeast Yeast are bigger than bacteria (3-4μm) but still very small Yeast reproduce by asexual budding Aerobic respiration makes bread rise Anaerobic respiration (lack of oxygen) produces ethanol by a process called fermentation

Quick Review: Animal, Plant, Yeast, Bacteria? List all cell types with a nucleus List all cell types with a cell wall List the bits found in all 4 cell types List the cell types that reproduce asexually

How quickly can you complete? Question Dash How quickly can you complete?

Experiment Apparatus set up: Method Stretch out the balloon by blowing it up a few times, then lay aside. Add yeast Yeast + Sugar Carbon Dioxide Lime Water

Experiment Results table: Hypothesis – which will blow the balloon up most? Justify your response. Tube Contents Results A Yeast + Juice B Yeast + Juice + Sugar C Juice + Sugar D Yeast + Sugar

Screaming jelly baby How is this similar to the yeast investigation? How does this show respiration? How is this practical different to what happens in your body? https://www.youtube.com/watch?v=tGrRBHxa9sQ

Grade A-A* – extended piece of writing Plenary Grade A-A* – extended piece of writing Using knowledge you have gained today and from your previous lesson you must write a short paragraph describing & explaining the key differences and similarities between: Plant Animal Bacterial & Yeast Cells (6 marks) Exam Tip – to improve your marks in this question you should aim to include the names of as many organelles as you can and try to define their function within a cell.

List the 3 parts of a plant cell not found in an animal cell Draw and fully label a bacterium List the 3 types of microorganism Draw and fully label a yeast cell Name 2 ways bacteria can be useful to people. Describe how the genetic material is different in a bacteria cell to yeast, animal and plant cells. Explain how some bacteria become resistant to antibiotics