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Biology GCSE > Bioenergetics > Flashcards

Bioenergetics Flashcards

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1
Q

Photosynthesis symbol equation

A

6 CO2 + 6 H2O —> C6 H12 O6 + 6 O2

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2
Q

Cross section of leaf

A

Waxy cuticle
Epidermal tissue
Palisade layer
Spongey mesophyll
Guard cells
Stomata

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3
Q

5 uses of glucose

A

Oils - energy store
Starch - energy store
Cellulose - for cell walls
Amino acids - for building proteins
Respiration - for energy

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4
Q

Limiting factors

A

Conc of CO2
Availability of Water
Intensity of light
Temp of environment

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5
Q

Three ways to measure the rate of photosynthesis

A

Count bubbles
Catch bubbles in measuring tube and measure volume
Gas syringe

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6
Q

Bubble count experiment procedure

A

Place pondweed in boiling tube (water + hydrogen carbonate) 10cm from light source
After 5 mins start counting bubbles for 1 minute, repeat for two results
Record results in table
Move 10 more cm away
Repeat for 2 results
Continue reps for a few more distances

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7
Q

Limiting factor graphs

A
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8
Q

Enzymes and temp

A

As temp ⬆️ photosynthesis ⬆️ because enzymes have more kinetic energy
At optimum level the most photosynthesis occurs
If the temp continues to ⬆️ photosynthesis ⬇️ as enzymes are denatured

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9
Q

Inverse square law

A

Converts distance from lamp to light intensity using
Light intensity = 1/distance²

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10
Q

Greenhouse features

A

Shades
Artificial Light (red)
Paraffin heater
Fertilisers
Heater
Ventilation
Glass

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11
Q

Metabolism

A

All the chemical reactions happening in a cell or in the body

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12
Q

Metabolic rate

A

The speed of chemical reactions in an organism

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13
Q

Factors affecting metabolic rate

A

Age
Genetics
Sex
Fat to muscle ratio

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14
Q

Respiration definition

A

The chemical reaction that releases energy from glucose

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15
Q

Anaerobic respiration equation in animals

A

Glucose —> lactic acid + energy

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16
Q

Fermentation equation in yeast and plants

A

Glucose —> ethanol + carbon dioxide + energy

17
Q

3 uses of energy from respiration

A

Growth - building molecules eg glycogen
Muscle contraction for movement
Maintaining body temperature

18
Q

Changes during exercise

A

Breathing depth and rate increase
Blood flow increases
more oxygen reaches cells
More glucose reaches cells
More respiration can occur
More energy is released
+glycogen stores are broken down into glucose
+more waste CO2 is produced
+increased breathing rate increases rate of lactic acid removal

Biology GCSE (5 decks)

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