B4

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  • Created by: zoe
  • Created on: 18-01-14 16:51
What two things do all cells contain?
DNA and organelles
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What does DNA contain and what form is it in?
genetic code and double helix
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What are organelles?
the different part of the cells structure
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What do organelles do?
different jobs within the cell and work together to allow the cell to perform a specific function
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What takes place in the cytoplasm?
chemical reactions including anaerobic respiration, the production of enzymes and other protiens
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What does mitochondria contain?
the enzymes needed for anaerobic respiration
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What is in the nucleus?
the DNA that carries the genetic code for making enzymes and other proteins used in all chemical reactions in the cell
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What does the cell membrane do?
allows chemicals like gases and water to pass in and out freely but prevents other chemicals from leaving or entering the cell
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What three extra things does a plant cell contain compared to human and animal cells?
cell wall, permanent vacuole, chloroplasts
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What is a cell wall made of and why?
cellulose to strengthen the cell
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What does a permanent vacuole do?
helps support the cell
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What do chloroplasts contain?
chlorophyll which absorbs light energy and some enzymes needed for photosynthesis
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What are enzymes?
protein molecules that speed up the rate of chemical reactions in cells
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What happens when the enzymes structure is permanently destroyed and it stops working?
enzyme becomes denatured
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When temperature is increased what happens in the frequency and energy of collisions between reactions and enzymes?
increases
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What three things happen once the enzyme and molecule are linked?
reaction takes place, products are released, process starts again
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What is the place called where the molecule fits into the enzyme?
active site
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What two factors can change the shape of the active site?
heating the enzyme over a certain temperature, altering the pH level
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What are the two types of respiration?
aerobic and anaerobic
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What is respiration?
the release of energy from food chemicals in all living cells
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What releases energy inside living cells by breaking down glucose and combining the products with oxygen?
aerobic respiration
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What releases energy inside the cytoplasm of living cells by breaking down glucose molecules without the use of oxygen?
anaerobic respiration
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What is active transport?
the movement of a substance against a concentration gradient
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What is the symbol equation for aerobic respiration?
C6H12O6 + 602 ----> 6CO2 + 6H2O + energy released
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What is the symbol equation for photosynthesis?
6CO2 + 6H20 (light energy) ----> (chlorophyll) C6H12O6 + 6O2
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What 3 factors can limit the rate of photosynthesis?
temperature, carbon dioxide concentration, light intensity
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What is the overall movement of substances from regions of high concentration to regions of low concentration called?
diffusion
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What do plants need to absorb from the soil for healthy growth?
nitrates
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What is a quadrat?
anything with a defined area
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What is a transect?
a random section across an area
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What is the overall movement of water from a dilute solution to a more concentrated solution through a partially permeable membrane called?
osmosis
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Other cards in this set

Card 2

Front

What does DNA contain and what form is it in?

Back

genetic code and double helix

Card 3

Front

What are organelles?

Back

Preview of the front of card 3

Card 4

Front

What do organelles do?

Back

Preview of the front of card 4

Card 5

Front

What takes place in the cytoplasm?

Back

Preview of the front of card 5
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