Exam 1 Review (SI)

What chemical bond does not share the electrons equally between the bond?

• Covalent Bond

• Ionic Bond

• Non Polar Covalent

• Polar Covalent

When a bond is formed, does the energy go in or does it get released?

what’s the name of this type of rxn?

• Energy is released when a bond is formed

  Exergonic

• Energy is costing when a bond is formed

  Endergonic

What type of molecules want to be away from water…?

• Hydrophobic molecules

• Hydrophilic molecules

Which one is endergonic?

• 
• 

Which one is exergonic?

• 
• 

True or False? Water needs a membrane protein in order to pass through the cell membrane…

and why?

• False

• True

• water is a polar molecule, it can interact with the hydrophilic regions

• water is a nonpolar molecule, it can interact with the hydrophobic regions

Why are nucleic acids so important? (Hint: 4 reasons)

• Info is stored in nucleic acids

• DNA encodes genes

• DNA serves as the template to make RNA

• RNA is used by the cell to make proteins

T or F? Na+ would need a membrane protein in order to cross the membrane…

What else would it need?

• False

• True

• Potassium

• Phosphate

What are the components of a carbohydrate?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

What are the four types of molecules that make up cells?

• Amino acid (protein)

• Nucleic Acids (DNA/RNA)

• Carbohydrates (sugars)

• Hydrocarbons (lipids)