All vertebrates use which of the following pigment as respiratory pigment?
a) Haemoglobin
b) haemocyanin
c) haemoerythrin
d) chlorocruorin
Mollusks use which of the following pigment as respiratory pigment?
a) Haemoglobin
b) haemocyanin
c) haemoerythrin
d) chlorocruorin
Explanation: Hemocyanins are copper-containing respiratory pigments found in many mollusks (some bivalves, many gastropods, and cephalopods) and arthropods
Some marine animals use which of the following pigment as respiratory pigment?
a) Haemoglobin
b) haemocyanin
c) haemoerythrin
d) chlorocruorin
Explanation: responsible for oxygen (O2) transport in the marine invertebrate phyla of sipunculids, priapulids, brachiopods, and in a single annelid worm genus, Magelona
Annelids use which of the following pigment as respiratory pigment?
a) Haemoglobin
b) haemocyanin
c) haemoerythrin
d) chlorocruorin
Explanation: Chlorocruorin is a dichroic red-green respiratory protein. It is chemically similar to haemoglobin, and is only found dissolved in the blood of certain marine annelid worms.
What is the colour of haemoglobin when it is oxygenated?
a) bright red
b) dark red
c) blue
d) almost colorless
What is the colour of haemoglobin when it is deoxygenated?
a) bright red
b) dark red
c) blue
d) almost colorless
