simmyhall's version from 2015-05-26 12:01

Section 1

Question Answer
All living things MRS GREN
What are enzymes Proteins that speed up chemical reactions
Enzymes Work best at optimum temp -why homeostasis is important
Increasing temp of enzymes Increased rate of reaction -heat causes more collision -more energy between enzymes and other molecules
If temp of enzyme too hot =Denatured
Enzymes are Specific only molecules with correct shape can fit into enzyme -lock and key
Active siteImportant part of enzyme -where specific molecules by and to the enzymes and reaction occurs
If u change shape of active site enzymes -Not work- pH and temperature (change pH) (increace temp to 60c -permanent change to shape -denature

Section 2

Question Answer
Active transport isProcess by which dissolved molecules move across a cell membrane from a lower to higher concentration
In active transport particles move against the Concentration gradient -imput of energy required from cell
Carrier proteins Pick up specific molecules and take them through the cell membrane against the concentration gradient
In humans takes placeDigestion of food in small intestine -carbohydrates broken into simple sugars(glucose) glucose absorbed by active transport into villi to be passed into bloodstream to be taken around body
Minerals from soil Concentration of them is v.low - minerals cannot be absorbed by osmosis(only water) or diffusion (to low concentration) -root hair cells have carrier molecules to pick up minerals and move them against a concentration gradient -energy -active transport

Section 3

Question Answer
Photosynthesis process by plants thatUses energy from the sunlight to covert carbon dioxide and water into molecules for growth
Light energy is absorbed byChlorophyll
Carbon dioxide+ water -----> glucose +oxygen6co2 6h2o C6H12O6 602
Glucose from photosynthesis useConverted into chemicals required for growth(cellulose) , converted into starch -storage molecules and can be converted back into glucose when plant needs it
Chloroplast Contains chlorophyll and enzymes needed for photosynthesis
Nucleus Contains DNA -genetic code for enzymes and. Proteins
Cell membrane allows gas and water to pass in and out of the cell while controlling passage of other molecules
Vacuole used to store waste materials and regulate water levels
Cell wallSupport for celll
Cytoplasm Enzymes and other proteins made here
Mitrochondria Where respiration happens

Section 4

Question Answer
Diffusion Overall movement of a substance in a region where it is in high concentration to an area where it is in lower concentration
Diffusion is passive processNo energy needed
Diffusion happens in Leaves of plants _ carbon dioxide and oxygen

Section 5

Question Answer
Osmosis (Type of diffusion) movement of water from a less concentrated solution to a more concentrated solution through a partially permeable membrane
Happens in Water moving into plant roots
Partially permeable membraneLet's some substances in but not others
For osmosis to happen you needTwo solutions with dif concentrations and a partially permeable membrane to separate them

Section 6

Question Answer
Factors affecting photosynthesis -light intensity Without enough light -plant cannot photosynthesis quick
Carbon dioxide Plant need s it cannot survive if insufficient amount
TempToo cold - less rate too hot- cannot photosynthesis
farmers use knowledge by Artificial light -continue to photosynthesis after day light and at a higher intensity - using paraffin lamps- increase rate by light but also increases carbon dioxide and heat

Section 7

Question Answer
Light meterLight intensity
quadrat Survey plants present in square meter ,placed randomly(not bias and more reliable comparisons)
Indentification key Name organisms
Transact Straight line and organism distribution can be recorded

Section 8

Question Answer
Aerobic respiration Used oxygen to break down glucose molecules
Anaerobic Not use oxygen if there isn't any or is little
When does anaerobic be usedAnimal being chased by predator , plants(waterlogged soils) or microbial cells(puncture wounds)
Equation of anaerobic in plant cells and some microorganismsGlucose -----> ethanol +carbon dioxide (+energy released )
Equation of anaerobic in animal cells and some microorganismsGlucose-----> lactic acid(+energy)
Aerobic respiration releases more Energy per glucose molecule than aneorbic.

Section 9

Question Answer
Bacteria molecule of circular DNAContains genetic code for enzymes in respiration
Yeast mitrochondira Contains enzymes for the reactions in aerobic respiration
Making breadYeast added to dough -dough =source of glucose needed for anaerobic
brewing alcoholFermentation
biogasAnimal manure -methane gas=used as fuel

Section 10

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