Question

1. Hemocyanins have ___________________, instead of heme, bound to the protein.

2.

1. All animals require water, and it may be provided in many forms. Which of the following is NEVER a source of water for an animal? Choose one.

A) Sea water.

B) Dietary water.

C) Products of hydrolysis.

D) Pond water.

Answer 1

Ans1:- Copper.

Hemocyanins are respiratory proteins occurring extracellularly in the hemolymph of some arthropods and molluscs.

Hemocynin have copper for binding with oxygen instide of haemoglobin.

Ans2:- C) Products of hydrolysis.

Actually hydrolysis uses water to breakdown bonds between different macromolecules.

So water is a reactant of hydrolysis reaction not product. So it cannt be use as source of water.

other options

Sea water --- turtles use sea water as source of water. Excess salt in sea water is excreated out by specialised glands present in orbit through tears. So turtles are always crying.

Desert animals use dietry water as water source.

Freah water fishes use pond as water source.

Ans2:-