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Biology > Haemoglobin As > Flashcards

Haemoglobin As Flashcards

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1
Q

how many polypeptides does haemoglobin have

A

4

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2
Q

how many haem groups does haemoglobin have

A

4

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3
Q

how many oxygen can each molecule of haemoglobin carry when fully saturated

A

4

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4
Q

what type of molecule is haemaglobin

A

a protein

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5
Q

where is haemoglobin found

A

red blood cells

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6
Q

where does haemoglobin pick up oxygen

A

the lungs

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7
Q

at a high or a low partial pressure does haemoglobin load oxygen

A

high

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8
Q

where does haemoglobin unload the oxygen

A

respiring tissues

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9
Q

what causes different types of haemoglobin

A

different primary structure

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10
Q

does haemoglobin have a tertiary or quaternary structure

A

quaternary

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11
Q

what chemical concentration is linked to unloading oxygen

A

high concentration of carbon dioxide

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12
Q

why is there a sigmoid shaped dissociation curve

A

first oxygen binds to haemoglobin causing small change in shape
this makes it easier for more oxygen to bind

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13
Q

what shape is a sigmoid curve

A

S shaped

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14
Q

which way would the curve be shifted for an organism with a high metabolic rate

A

the right

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15
Q

what does a curve shifted to the right mean for properties of the haemoglobin

A

lower affinity for oxygen
dissociates to respiring tissues more readily at higher partial pressure of oxygen
more oxygen for respiration more respiration for e.g. more heat

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16
Q

what does a curve shifted to the left mean about properties of the haemoglobin

A

haemoglobin has a higher affinity for oxygen

haemoglobin saturated and dissociated at lower partial pressure of oxygen

17
Q

how would people with the same type of haemoglobin load more oxygen

A

have more red bloods cells so more haemoglobin

18
Q

how does changes in CO2 concentration affect the curve

A 
more respiration
more CO2
lower pH
reduced affinity for oxygen by changing shape of haemoglobin
shifts curve right

Biology (43 decks)

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