Sci-Five | The Hindu Science Quiz: on Blood colours

Correct answers are highlighted in green. Click on the correct answer for further reading on the topic.

. Human blood is red. What colour is Octopus blood?

Red, like ours

Octopus blood appears blue because it is composed of a protein called haemocyanin.

White

Octopus blood appears blue because it is composed of a protein called haemocyanin.

Green

Octopus blood appears blue because it is composed of a protein called haemocyanin.

Blue

Octopus blood appears blue because it is composed of a protein called haemocyanin.

. Presence of iron in haemoglobin makes human blood appear red. The presence of which element in haemocyanin makes the blood of some species appear blue?

Cobalt

Since haemocyanin contains copper atoms the blood containing the protein appears blue.

Sulphur

Since haemocyanin contains copper atoms the blood containing the protein appears blue.

Copper

Since haemocyanin contains copper atoms the blood containing the protein appears blue.

Zinc

Since haemocyanin contains copper atoms the blood containing the protein appears blue.

. Some animals have yellow blood due to the presence of...

A zinc-based pigment

The yellow coloration in some animals, such as the sea cucumbers, is due to a high concentration of the yellow vanadium-based pigment, vanabin.

A vanadium-based pigment

The yellow coloration in some animals, such as the sea cucumbers, is due to a high concentration of the yellow vanadium-based pigment, vanabin.

Curcumin

The yellow coloration in some animals, such as the sea cucumbers, is due to a high concentration of the yellow vanadium-based pigment, vanabin.

Chlorine dioxide

The yellow coloration in some animals, such as the sea cucumbers, is due to a high concentration of the yellow vanadium-based pigment, vanabin.

. Chlorocruorin is a protein due to which blood in some animals appears...

Green

Individual units of chlorocruorin are actually very similar in appearance to haemoglobin.

Yellow

Individual units of chlorocruorin are actually very similar in appearance to haemoglobin.

Colourless

Individual units of chlorocruorin are actually very similar in appearance to haemoglobin.

Violet

Individual units of chlorocruorin are actually very similar in appearance to haemoglobin.

. What makes blood appear colourless?

Deoxygenation

When deoxygenated, blood appears colourless. When oxygenated it takes a brighter hue.  http://www.compoundchem.com/2014/10/28/coloursofblood/

Deacidification

When deoxygenated, blood appears colourless. When oxygenated it takes a brighter hue.  http://www.compoundchem.com/2014/10/28/coloursofblood/

Detoxification

When deoxygenated, blood appears colourless. When oxygenated it takes a brighter hue.  http://www.compoundchem.com/2014/10/28/coloursofblood/

Enucleation

When deoxygenated, blood appears colourless. When oxygenated it takes a brighter hue.  http://www.compoundchem.com/2014/10/28/coloursofblood/