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Flashcards in B4 Deck (17):
1

What are enzymes?

Biological cataysts 

proteins

shape is crucial for function

2

How dor enzymes work?

Enzymes break down or join molecules 

enzymes find molecules that fit in their active site

They join or split  these substrates in areaction

substrate released

 

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3

What effects enzymes?

Ph and temperature

If the ph is too high or too low it can cause it can cause the enzymes to change shape

If it is too cold enzymes will move around slowing causing less reactions, but the temperature is too high, the enzymes will denature and loose their shape  

4

Products of photsynthesis?

glucose

starch

Enzymes

chlorophyll

5

What is the formula for photosynthesis?

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6

What are the parts of a plant cell?

Vacuole- membrane in the centre of the cell

Nucleus- holds DNA

Chloroplasts- holds chlorophyll and enzymes 

Cell wall- cellulose forms it

Cell membrane- alls gases and water in and out of the cell

Cytoplasm- enzymes produced here

7

How is glucose stored in plants?

Stored as starch as it is insoluble 

stored in leaf cells

8

How is energy used in plants?

Starch broken down into glucose whichg is converted ionto energy through respiration

Energy powers chemical reactions to make cellulose, starch, proteins 

9

What is diffusion?

Diffusion is a process where liquids and gases move from from a concentrated state to adilute one

This occurs when molecules in the gas or liquids collide and in different directions until they are spread out

10

Eg. of diffusion

Tea brewing

carbon dioxide going into plants i n exchange for oxygen

11

What is osmosis?

osmosis is a type of diffusion that moves water in and out of cells through cell membranes. The Membrane is partially permeable and allows small molecules like water in but not large molecules like glucose

12

What is active transport?

The root hair cells have carrier molecules on their cell membranes. These pick up the mineral ions and move them across the membrane into the cell against theconcentration gradient. Remember that substances move down a concentration gradient in diffusion, so active transport is quite different. Active transport needs energy from respiration to happen

13

What factors limit the rate of photosynthesis?

Carbon dioxide

water

chlorophyll

sunlight

14

what is a measuring tool, used to find the number of plants in a certain area?

Quadrat

15

What is the formula for aerobic respiration?

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16

What is anaerobic respiration in plants and bacteria and animals?

Human

Glucose= latic acid + energy

Animal bacteria

Glucose= ethanol + carbon dioxide+energy

17

What is yeast used for?

Baking

brewing wine and beer

makinking biofuels

biogases

with methane of carbon dioxide