Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AQA GCSE Biology > Topic 4: Bioenergetics > Flashcards

Topic 4: Bioenergetics Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Geography - AQA flashcards AP® Biology flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route B flashcards Biology 101 flashcards
1
Q

What is the equation for Photosynthesis?

A

Carbon Dioxide + Water –> Glucose + Oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the balanced symbol equation for photosynthesis?

A

6 CO2 + 6H2O –> C6H12O6 + 6O2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is an exothermic reaction?

A

Releases energy into surroundings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is an endothermic reaction?

A

Takes in energy from surroundings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What type of reaction is photosynthesi?

A

Endothermic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is glucose used for in respiration?

A

Provide energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where is light energy provided for photosynthesis?

A

Absorbed by chlorophyll

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Where is water provided for photosynthesis?

A

Taken into roots by osmosis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Where is carbon dioxide provided for photosynthesis?

A

Enters leave in diffusion through stomata

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Where is oxygen provided for respiration?

A

Leaves through diffusion by stomata in leaves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the inverse square law?

A

Light Intensity = 1/d^2
Less photons per mm so light intensity decreases as area increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the uses of glucose?

A
  • Respiration
  • Converted into insoluble starch for storage
  • Used to produce fat or oil for storage
  • Used to produce cellulose, strengthens cell wall
  • Used to produce amino acids for protein synthesis
  • Control of osmosis
  • Growth
  • Make larger molecules
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the limiting factors for photosynthesis?

A
  • Temperature
  • CO2 Concentration
    -Light Intensity
  • Number of chlorophyll
  • Volume of Water *only use if necessary
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why are limiting factors important?

A

Important in the economics of enhancing the conditions in greenhouses to gain the maximum rate of photosynthesis whilst maintaining profit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How can you read graphs and locate limiting factors?

A

The rate of photosynthesis will increase as limiting factor increases but will level out at point another factor prevents further increase of photosynthesis
Check flashcards for graphs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How can you read a temperature graph in relation to rate of photosynthesis?

A

The rate of photosynthesis will increase as temp. increases until optimum temp. is reached. The rate will then decreased as temp. increase further. This is because enzyme would have denatured.
Check flashcards for graphs

17
Q

What is the starch food test?

A
  • Food on white dimple tile
  • Few drops of iodine solution
  • Note colour change
  • Starch turns iodine blue - black
18
Q

What is the glucose food test?

A
  • Grind food in pestle and mortar
  • Two spatulas in test tube
  • 1cm^3 of distilled water
  • 10 drops of Benedict’s
  • 80°C Water Bath for 5 minutes
  • Turns brick red if present but varies due to sugar concentration
19
Q

What is the protein food test?

A
  • Grind food in pestle and mortar
  • Two spatulas in test tube
  • 1cm^3 of distilled water
  • 10 drops of Biuret’s and Sodium Hydroxide
  • Shake
  • Protein turns purple
20
Q

What are guard cells?

A

Use osmotic pressure to open and close stomata, allowing plants to regulate water ( prevent water loss ) and facilitate gas exchange necessary for photosynthesis

21
Q

What are palisade cells?

A

Receive most sunlight for the production of glucose and oxygen in photosynthesis, contain most chloroplasts and are closely packed together to increase rate of absorption

22
Q

What is the independent variable?

A

Variable which is altered

23
Q

What is the dependent variable?

A

Variable being tested for

24
Q

What is the control variable?

A

Variable being maintainedWhat

25
Q

What do plants use to produce proteins?

A

Plants use nitrate ions that are absorbed by soil

AQA GCSE Biology (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions