AQA A LEVEL JUNE BIOLOGY EXAM
QUESTIONS WITH ANSWERS
What is the purpose of respiration ? - ANSWER>>To release energy from glucose
To produce ATP
What is the general equation for aerobic respiration ? - ANSWER>>6O2 +
C6H1206 --> 6H2O + 6CO2 + energy
What do plants need energy for ? (name 5) - ANSWER>>1. Photosynthesis
2. Active transport of minerals via roots
3. DNA replication,
4. Cell division,
5. Protein synthesis
What do animals need energy for ? (name 6) - ANSWER>>1. Muscle contraction
2. Maintaining a constant body temperature
3. Active transport
4. DNA replication
5. Cell division
6. Protein synthesis
What is the chemical name for ATP? - ANSWER>>Adenosine triphosphate
What are the 3 components of ATP? - ANSWER>>1 molecule of adenine
1 molecule of ribose
3 molecules of phosphate ions
How is ATP formed? - ANSWER>>Condensation reaction between adenosine
diphosphate (ADP) and inorganic phosphate (Pi)
Catalysed by ATP synthase
, Which enzyme catalyses the condensation reaction between ADP and Pi ? -
ANSWER>>ATP synthase
What is phosphorylation ? - ANSWER>>Adding phosphate to a molecule
How does ATP move through the cell ? - ANSWER>>Diffusion
Which enzyme catalyses the hydrolysis of ATP ? - ANSWER>>ATP hydrolase
What are the 6 properties of ATP ? - ANSWER>>1. Stores and releases small
amount of energy so none wasted as heat
2. Small, soluble molecule so easily transported
3. Easily hydrolysed so energy releases instantly
4. Quickly resynthesised
5. Make other molecules more reactive (phosphorylation)
6. Can't pass out of cell so immediate energy supply
What is the compensation point ? - ANSWER>>The level of light intensity (in
plants) where the rate of respiration and photosynthesis are the same
How could you find a plant's compensation point ? - ANSWER>>Plot a graph of
light intensity against net oxygen production
Find the light intensity when net oxygen production =0
What are 3 differences between aerobic and anaerobic respiration ? -
ANSWER>>1. Aerobic uses oxygen, anaerobic doesn't
2. Aerobic has 4 stages, anaerobic just has glycolysis
3. Aerobic produces CO2 and H2O, anaerobic produced lactic acid (animals) and
ethanol (yeast)
Where does glycolysis occur ? - ANSWER>>Cell cytoplasm
QUESTIONS WITH ANSWERS
What is the purpose of respiration ? - ANSWER>>To release energy from glucose
To produce ATP
What is the general equation for aerobic respiration ? - ANSWER>>6O2 +
C6H1206 --> 6H2O + 6CO2 + energy
What do plants need energy for ? (name 5) - ANSWER>>1. Photosynthesis
2. Active transport of minerals via roots
3. DNA replication,
4. Cell division,
5. Protein synthesis
What do animals need energy for ? (name 6) - ANSWER>>1. Muscle contraction
2. Maintaining a constant body temperature
3. Active transport
4. DNA replication
5. Cell division
6. Protein synthesis
What is the chemical name for ATP? - ANSWER>>Adenosine triphosphate
What are the 3 components of ATP? - ANSWER>>1 molecule of adenine
1 molecule of ribose
3 molecules of phosphate ions
How is ATP formed? - ANSWER>>Condensation reaction between adenosine
diphosphate (ADP) and inorganic phosphate (Pi)
Catalysed by ATP synthase
, Which enzyme catalyses the condensation reaction between ADP and Pi ? -
ANSWER>>ATP synthase
What is phosphorylation ? - ANSWER>>Adding phosphate to a molecule
How does ATP move through the cell ? - ANSWER>>Diffusion
Which enzyme catalyses the hydrolysis of ATP ? - ANSWER>>ATP hydrolase
What are the 6 properties of ATP ? - ANSWER>>1. Stores and releases small
amount of energy so none wasted as heat
2. Small, soluble molecule so easily transported
3. Easily hydrolysed so energy releases instantly
4. Quickly resynthesised
5. Make other molecules more reactive (phosphorylation)
6. Can't pass out of cell so immediate energy supply
What is the compensation point ? - ANSWER>>The level of light intensity (in
plants) where the rate of respiration and photosynthesis are the same
How could you find a plant's compensation point ? - ANSWER>>Plot a graph of
light intensity against net oxygen production
Find the light intensity when net oxygen production =0
What are 3 differences between aerobic and anaerobic respiration ? -
ANSWER>>1. Aerobic uses oxygen, anaerobic doesn't
2. Aerobic has 4 stages, anaerobic just has glycolysis
3. Aerobic produces CO2 and H2O, anaerobic produced lactic acid (animals) and
ethanol (yeast)
Where does glycolysis occur ? - ANSWER>>Cell cytoplasm
