NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Water is essential to all living things. One important attribute of water allows it to maintain a constant environment within cells. Which property of water allows it to do this?
A
moderates temperature
B
breaking of covalent bonds
C
surface tension of water surface
D
expansion of water when it freezes
Explanation: 

Detailed explanation-1: -Water’s extensive capability to dissolve a variety of molecules has earned it the designation of “universal solvent, ‘’ and it is this ability that makes water such an invaluable life-sustaining force. On a biological level, water’s role as a solvent helps cells transport and use substances like oxygen or nutrients.

Detailed explanation-2: -Water is the medium of life. Its four key properties-thermal properties, ability to act as a universal solvent, cohesion and adhesion-help support the life processes and habitats of virtually all organisms.

Detailed explanation-3: -Living organisms need water because it plays a vital role in the reactions taking place within organism’s cells and body. Water acts as a universal solvent, providing a medium for the chemical reactions to occur. Substances are also transported from one part of body to the other in the dissolved state.

Detailed explanation-4: -Furthermore, water has a high specific heat because it takes a lot of energy to raise or lower the temperature of the water. As a result, water plays a very important role in temperature regulation. Since cells are made up of water, this property helps to maintain homeostasis.

There is 1 question to complete.