quiz review

what is the maximum number of covalent bond can carbon form with the atomic number 6?
A. one
B. two
C. three
D. four

D. four

what is the maximum number of bonds oxygen can form with an atomic number 8?
A. 1
B. 2
C. 3
D. 4

B. 2

what weak bond exists between water molecules?
A. covalent
B. hydrogen
C. ionic
D. van der waals

B. hydrogen

chlorine in this form, Cl-, is best described as a....
A. a neutral atom
B. an ion that is an anion
C. an ion that is a cation
D. an isotope

B. an ion that is an anion

if sodium is in the from of Na+ what would it have lost?
A. one proton
B. one neutron
C. one electron
D. nothing

C. one electron

when oxygen binds to two hydrogen atoms to from water, the bonds between the oxygen and....
A. polar covalent
B. ionic
C. non polar covalent
D. van der waals

A. polar covalent

if the pH was decreased from 10 to 9 it means that the...
A. concentration of H+ ions increased
B. concentration of OH- ions increased
C. concentration of H+ ions decreased
D. all ion concentration would stay the same

A. concentration of H+ ions increased

what element must exist in organic compounds such that at least two exist and a covalent bond...
A. carbon
B. oxygen
C. hydrogen
D. nitrogen

A. carbon

which is the amino functional group found in all amino acids?
A. -NH2
B. -OH
C. -COOH
D. -SH

A. -NH2

which is a carboxyl functional group found in all amino acids?
A. -OH
B. -COOH
C. -NH2
D. -PO4

B. -COOH

which class of biological molecules always contains carbon and hydrogen in a ratio of 2:1?
A. carbohydrates
B. proteins
C. nucleic acids
D. lipids

A. carbohydrates

dehyrdation synthesis is the process that removes what to join 2 molecules together
A. hydroxyl group
B. carbon
C. water
D. nitrogen

C. water

the opposite of dehydration synthesis where water is added to break apart larger molecules is called...
A. condensation reaction
B. hydrolysis
C. lysis
D. phosphorylation

B. hydrolysis

the difference between a pH of 2 and pH of 3 is
A. pH of 2 has 10 times more H+ ions
B. pH of 3 has 10 times more H+ ions
C. they both have the same number of H+ ions
D. pH of 2 has 1000 times more H+ ions

A. pH of 2 has 10 times more H+ ions

lipids commonly known as triglycerides are composed of what two subunits?
A. glyercol and amino acids
B. glycerol and fatty acids
C. fatty acids and amino acids
D. nitrogenous bases and phosphate groups

C. glycerol and fatty acids

which are common functions of proteins that make up amino acids?
A. provide structure, help with immunity and act as enzymes
B. provide quick energy and send information from generation to generation
C. provide insulation
D. provide stored energy

A. provide structure, help with immunity and act as enzymes