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MDCAT
Biology
2009

Biology · Transport

Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.

Question

The respiratory pigment, which has much higher affinity to combine with oxygen, is:

Options
  • A

    Myoglobin

  • B

    Haemoglobin

  • C

    Globin

  • D

    Hemocyanin

Explanation

Explanation:

The respiratory pigment, which has much higher affinity to combine with oxygen is Myoglobin.

 The respiratory pigment, which has much higher affinity to combine with oxygen is Myoglobin, not Haemoglobin.

 This option is not correct because globin is a protein that makes up a part of haemoglobin.

 This option is also incorrect because hemocyanin is a respiratory pigment found in some invertebrates that uses copper rather than iron to bind to oxygen.

The respiratory pigment, which has much higher affinity to combine with oxygen is Myoglobin.

The respiratory pigment, which has much higher affinity to combine with oxygen is Myoglobin, not Haemoglobin. 

This option is not correct because globin is a protein that makes up a part of haemoglobin.

This option is also incorrect because hemocyanin is a respiratory pigment found in some invertebrates that uses copper rather than iron to bind to oxygen.

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Tagged under Biology · Transport · 2009