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Question 1

TRUE OR FALSE:

Double bonds do not rotate, while single covalent bonds rotate freely.

Answer 1

FALSE

Single covalent bonds are arranged in tetrahedron that enables it to rotate freely.

Double covalent bonds have planar structure.

Question 2

It is the measure of the affinity a nucleus has for outer shell electrons.

Answer 2

ELECTRONEGATIVITY

Question 3

Unequal distribution of charge constitutes a

Answer 3

Dipole

Question 4

It is less powerful than hydrogen bonding.

Answer 4

Dipole interactions

Question 5

formed by hydrogen bonds between parallel parts of the protein

Answer 5

Beta-pleated sheet

Question 6

It needs to separate the strands for replication and synthesis of RNA

Answer 6

DNA

Question 7

Binding of substrates in enzyme catalysis

Answer 7

PROTEINS

Question 9

Leads to breaking of hydrogen bonds; Denaturation of proteins and separation of strands of nucleic acids

Answer 9

HEAT

Question 10

Protons that can dissociate when dissolved in water

Answer 10

ACIDS (DONORS)

Question 11

It can absorb protons when dissolved in water.

Answer 11

BASE (ACCEPTOR)

Question 13

It is the interactions between molecules or parts of molecules, and not atoms.

Answer 13

HYDROGEN BONDS

Question 14

Why do hydrogen and carbon do not form significant charges?

Answer 14

Because the electronegativities of two atoms are similar.

Question 15

A negative change in G means

Answer 15

release of energy (EXERGONIC REACTION)

Question 16

positive change in G means

Answer 16

absorbs energy (ENDERGONIC REACTION)

Question 17

FORMULA OF STANDARD GIBBS FREE ENERGY

Answer 17

ΔG’° = -RTlnKeq

R is constant = 8.315 J/mol K
T = Kelvin (degree Celcius + 273.16)

Question 17

TRUE OR FALSE:

Large Values of Keq means unfavorable reaction.

Answer 17

FALSE. It is because a large value of Keq is obtained if there are more products are yield. Therefore, if the Keq is high, then it is a favorable reaction.

Question 18

TRUE OR FALSE:

Ionic and polar compounds dissolve in water.

Answer 18

TRUE

Question 19

TRUE OR FALSE

Non-polar do not dissolve in water.

Answer 19

TRUE

Question 20

TRUE OR FALSE

Phospholipids are amphiphilic.

Answer 20

TRUE

Because amphiphilic refers to the presence of both polar and non-polar regions. Since a phospholipid bilayer has hydrophilic heads and non-polar tails, they are considered amphiphilic.

Question 21

Non-mixing of hydrophobic molecules are water rooted in the increase in —————- favored in the unmixed state.

Answer 21

ENTROPY

Question 22

Spontaneously form lipid bilayer in water

Answer 22

GLYCEROPHOSPHOLIPIDS and SPHINGOLIPIDS

Question 23

Help hold the proteins and DNA together

Answer 23

Hydrogen bonds

Question 24

# TRUE OR FALSE Hydrogen bonds are weaker than covalent bonds, but are stronger than dipole interactions

Answer 24

TRUE

Question 26

It is the measure of proton concentration.

Answer 26

pH

Question 27

Corresponding measure of Hydroxide ion concentration

Answer 27

pOH

Question 28

# TRUE OR FALSE Strong acids, such as NaOH completely dissociate in water.

Answer 28

FALSE. NaOH is not an acid, but a base. However, strong acids, like HCl completely dissociate in water.

Question 29

# TRUE OR FALSE Strong bases, such as NaOH completely dissolve in water.

Answer 29

TRUE

Question 30

# TRUE OR FALSE Acetic acid only partly dissociate in water.

Answer 30

TRUE

Question 31

measure of the strength of weak acid

Answer 31

pKa

Question 32

# TRUE OR FALSE Weak acids with lower pKa values are weaker than those with higher pKa values.

Answer 32

FALSE Lower pKa values are stronger than those with higher pKa values. In simple terms, the relationship is inversely proportional.

Question 33

It is the capacity of buffer to resist change

Answer 33

BUFFER CAPACITY

Question 34

Maximum available energy

Answer 34

Free-energy change or Gibbs Free-Energy

Question 35

Father of Modern Chemistry

Answer 35

ANTOINE LAVOISIER

Question 36

Universal Energy currency

Answer 36

ATP

Question 37

Randomness or disorder in a system

Answer 37

ENTROPY

Question 38

Heat content of reacting system

Answer 38

ENTHALPY

Question 39

The heat content of the products is less than that of the reactants

Answer 39

Negative Change in enthalphy; EXOTHERMIC

Question 40

The enthalpy in Endothermic reaction

Answer 40

Positive Change in enthalpy

Question 41

Expressed the amount of energy capable of doing work during a reaction at constant temperature and pressure

Answer 41

FREE ENERGY

Question 42

collection of matter that is undergoing a particular chemical or physical process

Answer 42

REACTING SYSTEM

Question 43

Reacting system and surroundings

Answer 43

UNIVERSE

Question 44

Both energy and mass can enter and exit in this system

Answer 44

OPEN SYSTEM

Question 45

Only energy can enter and exit in this system

Answer 45

CLOSED SYSTEM

Question 46

No mass and energy can enter or exit in this system.

Answer 46

ISOLATED SYSTEM

Question 47

Study of transductions

Answer 47

BIOENERGETICS

Question 48

# TRUE OR FALSE Biological energy transformations obey the laws of thermodynamics.

Answer 48

TRUE

Question 49

rich and capable of donating electrons

Answer 49

NUCLEOPHILES

Question 50

Electron-deficient that seek electrons

Answer 50

ELECTROPHILES