NURSING ANM AND GNM

NURSING EXAM QUESTIONS

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is a hydrogen bond?
A
attraction between molecules of the same substance
B
substance that is dissolved in a solution
C
weak attraction between a hydrogen atom and another atom
D
way plants transport water through their tissues
Explanation: 

Detailed explanation-1: -The hydrogen bond is a weak bond. The strength of the hydrogen bond is in-between the weak Van der Waals forces and the strong covalent bonds. The dissociation energy of the hydrogen bond depends upon the attraction of the shared pair of electrons and hence on the electronegativity of the atom.

Detailed explanation-2: -A weak force of attraction that exists between a hydrogen atom in one molecule and an electronegative atom of another molecule is known as hydrogen bonding.

Detailed explanation-3: -Hydrogen Bonding. Hydrogen bonding is a special type of dipole-dipole attraction between molecules, not a covalent bond to a hydrogen atom. It results from the attractive force between a hydrogen atom covalently bonded to a very electronegative atom such as a N, O, or F atom and another very electronegative atom.

Detailed explanation-4: -Weak bonds-When there is less force of attraction in between the atoms or molecules they are called weak bonds. They are of two types-Van der Waal Bonds and Hydrogen bond. Van de Waal bonds are weak bonds formed due to the less force of attraction.

Detailed explanation-5: -Hydrogen bonding of water molecules The plus end of one-a hydrogen atom-associates with the minus end of another-an oxygen atom. These attractions are an example of hydrogen bonds, weak interactions that form between a hydrogen with a partial positive charge and a more electronegative atom, such as oxygen.

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