Biology B1

  • Created by: Amy_5639
  • Created on: 09-04-18 12:19
1.List four features that animal and plant cells have in common.
Nucleus, cytoplasm, mitochondria, cell membrane
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2.Give two sub-cellular structures that are present in prokaryotic cells but not eukaryotic cells.
Plasmids and chromosomal DNA
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3.How have electron microscopes been able to increase our understanding of sub-cellular structures?
They let us see things a lot smaller in more detail
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4.Why is it important to take a thin slice of a sample before viewing it under a light microscope?
It needs to be able to let light through it for you to be able to see it clearly
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5.How can you calculate the magnification of an image if you don't know which lenses were used?
magnification=image size divided by real size
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6.Give the names of the four bases of DNA.
Adenine, cytosine, guanine, thymine
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7.Describe the structure of a nucleotide.
Nucleotides are joined together in a long chain making DNA a polymer and each nucleotide contains a small molecule called a 'base'
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8.What is a gene?
A short length of a chromosome, it determines the production of proteins.
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9.Draw a diagram to show how the 'lock and key' mechanism of enzymes works.
Lock and Key:
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10.What does it mean when an enzyme has been 'denatured'?
If the temperature gets too hot, some of the bonds holding the enzyme together break causing the enzyme to denature
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11.Sketch a graph to show how substrate concentration affects the rate of an enzyme-controlled reaction.
.
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12.Give two things that you could measure when investigating the rate of an enzyme-controlled reaction.
You can measure how fast a product appears or how fast a substrate disappears when investigating the rate of an enzyme-controlled reaction
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13.Give two variables that need controlling when investigating the effect of pH on an enzyme-controlled reaction.
Varying the initial concentrations of the substrate to investigate the effect of substrate concentration and vary the initial concentrations of the enzyme to investigate the effect of enzyme concentration
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14.What is respiration?
the process of transferring energy from the breakdown of glucose. It occurs in every cell in all living organisms- a universal chemical process
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15.What is the function of ATP in a cell?
Stores the energy needed for many cell processes
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16.Is respiration an exothermic or endothermic reaction?
Exothermic reaction
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17.Name the type of respiration that requires oxygen.
Aerobic respiration
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18.Give an example of when lactic acid would be produced as a product of respiration.
When you exercise lactic acid builds up in your muscles, which gets painful and makes your muscles fatigued
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19.Which form of respiration transfers more energy per glucose molecule?
Aerobic respiration
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20.What type of polymer do you get when you join two simple sugars?
Carbohydrates
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21.What type of biological molecule are oils?
Lipids
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22.Name the basic units that lipids are made from.
Glycerol and three fatty acids
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23.In what part of the cell does photosynthesis take place?
Chloroplasts
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24.Give three factors that can limit the rate of photosynthesis.
Light intensity, concentration of carbon dioxide, temperature
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25.Describe how you could investigate the effect of carbon dioxide concentration on the rate of photosynthesis.
You can dissolve different amounts of sodium hydrogen-carbonate (which gives off carbon dioxide) in the water
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26.Is photosynthesis an endothermic or exothermic reaction?
Endothermic
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27. How do you work out light intensity?
.
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Other cards in this set

Card 2

Front

2.Give two sub-cellular structures that are present in prokaryotic cells but not eukaryotic cells.

Back

Plasmids and chromosomal DNA

Card 3

Front

3.How have electron microscopes been able to increase our understanding of sub-cellular structures?

Back

Preview of the front of card 3

Card 4

Front

4.Why is it important to take a thin slice of a sample before viewing it under a light microscope?

Back

Preview of the front of card 4

Card 5

Front

5.How can you calculate the magnification of an image if you don't know which lenses were used?

Back

Preview of the front of card 5
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