Bonds
What are the four major elements found in the human body?
Oxygen
carbon
hydrogen
nitrogen
What are the properties of acids and bases with respect to hydrogen ions?
Acids release hydrogen ions (H+), while bases accept them.
What type of molecules are attracted to water molecules?
a. Hydrophilic molecules.
b. Hydrophobic molecules.
a. Hydrophilic molecules.
What is Ion?
An ion is an atom or molecule with a net electrical charge.
For example: Cation(+ve) and Anion(-ve).
What type of solution releases hydrogen ions when dissolved in water?
Acidic solution.
Which type of molecules do not dissolve in water?
Hydrophobic molecules.
Which bond have two types?
a. Hydrogen bond
b. Covalent bond
c. Ionic bond
b. covalent bond
polar and non-polar.
What is the definition of a base in terms of hydrogen ions?
A base accepts hydrogen ions (H+).
What characteristic of molecules determines if they are hydrophobic or hydrophilic?
Their Polarity
What type of bond involves the transfer of electrons from one atom to another?
Ionic bond.
What term is used for substances that increase the concentration of hydrogen ions in a solution?
A. Acids
B. Bases
A. Acids.
Why are certain molecules hydrophilic and others hydrophobic?
a. Hydrophilic molecules are nonpolar and hydrophobic are polar.
b. Hydrophilic molecules are polar and hydrophobic are nonpolar.
c. Both are polar.
d. Both are non polar.
b.
Hydrophilic molecules are attracted to water due to their polarity, while hydrophobic molecules repel water because they are nonpolar.
What is the main difference between ionic bonds and covalent bonds?
Ionic bonds involve the transfer of electrons, while covalent bonds involve sharing electrons.
Which type of solution has a pH greater than 7?
Basic (alkaline) solution.
What are the examples of carbohydrates, lipids, and proteins ?
Hint: Fat, glucose, and collagen. Put them on order.
1. Glucose
2. Fats
3. Collagen