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Biology B2 GCSE
| Question | Answer |
|---|---|
| What are the advantages of free range farming | Less feed costs Better life for animal Less attention need to be paid |
| Enzymes activity is affected by what 2 things | An enzyme as a specially shaped ACTIVE SITE, the shape of it allows only the CORRECT REACTANTS to REACT |
| What does bile do | Neutralises stomach acid to allow an optimum pH (8+) for lipase, protease and amylase |
| What\'s isomerase sometimes used for | Pre-digesting baby food What\'s the function of yeast |
| How does oxygen in the blood get to the muscles | Through DIFFUSION What is negative feedback |
| What would happen if our bodies over heated | Enzymes would denature What would happen if we got too cold |
| Why is fructose used in diet things | It's sweeter, so less is used to achieve the same sweetness |
| Enzymes are ______ made by ____ _____ of ____ acids | Enzymes are PROTEINS made by LONG CHAINS of AMINO acid |
| What 3 things can cause plant growth to plateau? | Limiting Factors 1) Light Intensity 2) % of CO2 3) Temperature (until the point of denaturing) |
| What 4 things are needed for photosynthesis to happen? | Light, chlorophyll, CO2 and water |
| 3 places the leaf gets water from? | Soil, roots and leaves |
| 6 ways glucose can be use in a green plant? | 1) Respiration 2) Making Fruit 3) Making Cell Walls 4) Making Proteins 5) Seeds 6) Starch - Stored for winter! |
| 3 Elements for life | Carbon, Hydrogen and Oxygen |
| 2 Important Mineral Ions? | Nitrate, Magnesium |
| Nitrate Deficiency Symptoms? | Stunted Growth |
| Magnesium Deficiency Symptoms | Yellow Leaves (Lack of Chlorophyll) |
| Bar on the bottom of a biomass pyramid is always what? | A Producer |
| How can energy transfers within food chains be inefficient? (2 Reasons) | 1) Energy released by respiration is used for movement 2) Lost in Waste materials |
| Improved food chain efficiency? | - Prevent animal movement - Heat their surroundings |
| What is cellulose? | Carbohydrate |
| Why do moist surroundings help decay? | The oxygen in the water provides the feeders with oxygen! |
| How does Carbon get back in the atmosphere? | Fossil fuels and buring (Smoke) |
| What is the average enzyme denaturing temperature? | 45C |
| Definition of Digestion? | It is the breakdown of carbohydrates, proteins and fats into small soluble substances thatcan be absorbed into the blood |
| Where is Bile produced? | Liver |
| Where is excess water removed from during digestion? | The large intestine |
| 3 key things monitored by homeostasis | Core temperature, Ion Content and Blood Glucose |
| Temperature control center in the brain? | Thermoregulatory Centre |
| What's the biological term for what happens to blood vessels when you are too cold? | Vasoconstriction |
| What is urea? | Broken down amino acids |
| Where is urea removed from the bloodstream | Kidneys |
Created by:
DHSBBen
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