biochemistry

Select the functional group that is not present in this molecule.

• carboxyl

• methyl

• hydroxyl

• amino

A compound contains hydroxyl groups as its predominant functional group. Identify which of the following statements is true concerning this compound.

• It lacks hydrogen, so it acts as an acid.

• It is hydrophobic.

• It won’t form hydrogen bonds with water.

• It should dissolve in water.

Choose 3 functional groups that have a double bond.

• Carboxyl, hydroxyl, phosphate

• Hydroxyl, carboxyl, amino

• Amino, phosphate, carbonyl

• Carbonyl, carboxyl, phosphate

Select the non-polar functional group.

• Carbonyl group

• Hydroxyl group

• Methyl group

• Sulfhydryl group

Select a true statement to describe valence electrons.

• Electrons that are not involved in bonding.

• Electrons in the outermost shell of an atom.

• Electrons in the innermost shell of an atom

• Total number of electrons in an atom.

State the charge of each neutron, electron and proton

• Positive, neutral and negative

• Negative, positive and neutral

• Neutral, negative and positive

• Neutral, positive and negative

“Plant converting energy from sunlight into chemical energy”.

This statement is suitable to explain the concept of __________.

• 1^st law of thermodynamic

• 2^nd law of thermodynamic

• 3^rd law of thermodynamic

• None of the above

Identify the name given to the type of system in thermodynamic that allows transfer of matter, energy or work across the boundary.

• Closed system

• Open system

• Isolated system

• The universe

A covalent bond is when atoms bond by _______ electrons, if the electrons are shared _______ the bond is polar; if the electrons are shared _______ the bond is non-polar.

• Sharing; equally; unequally

• Donating; equally; unequally

• Sharing; intermolecular; intramolecular

• None of the above

If enthalpy change for a reaction is zero, then ∆G equals to

• -T∆S

• T∆S

• -∆H

• ∆H