BZ 440 Exam 1 Questions with Correct Answers Latest Update 2025-2026
monoecious - Answers having male and female reproductive organs in the same plant
dioecious - Answers Having male and female reproductive organs in separate plants
protoplast - Answers Plant cell without a cell wall; used for transformation
Middle lamella is made up of - Answers calcium and magnesium pectate
middle lamella - Answers first formed layer of the cell wall
primary cell wall is composed of - Answers cellulose, hemicellulose, and pectin
secondary cell wall is made up of - Answers cellulose, hemicellulose, and lignin
without stress relaxation - Answers the synthesis of new wall materials would only thicken the
cell wall.
expansins - Answers the protein that loosens the cellulose-cellulose junction in the microfibrils
causing cell wall loosening.
What might happen for a plant if the SCW synthesis in xylem vessels has ceased? - Answers the
xylem would collapse due to suction pressure
oxidation - Answers Gain of oxygen,
Loss of Hydrogen,
Loss of electron:
Energy is released
reduction - Answers Loss of oxygen,
Gain of hydrogen,
Gain of electron:
Energy is used
low Km - Answers high affinity
high Km - Answers low affinity
Km equals - Answers the substrate concentration at 1/2 Vmax
Competitive Inhibitor - Answers similar to substrate in structure
Competitive Inhibitor - Answers do not affect Vmax
, Competitive Inhibitor - Answers increase Km
Competitive Inhibitor - Answers often end products of the reaction
Non-Competitive Inhibitor - Answers lowers Vmax
Non-Competitive Inhibitor - Answers does not affect Km
Nitrogen form in plants - Answers protein, nucleic acids, chlorophyll, hormones
Nitrogen functions - Answers most biological processes
Phosphorus form in plants - Answers DNA, RNA, ATP, sugar, membranes
phosphorus functions - Answers most biological processes
Potassium form in plants - Answers free ion
potassium functions - Answers enzyme regulator, osmo-regulator
Magnesium form in plants - Answers chlorophyll or free ion
magnesium functions - Answers photosynthesis, enzyme activator
Calcium form in plants - Answers in cell walls or as free ion
Calcium functions - Answers cell division, cross-links pectin in middle lamella
Boron form in plants - Answers in cell walls
boron functions - Answers cell division and growth
Sulfur form in plants - Answers amino acids, vitamin B, coenzyme A, Fe-S cluster
Sulfur functions - Answers most biological processes
Copper form in plants - Answers protein cofactor
Copper functions - Answers photosynthesis, respiration, redox reactions
molybdenum form in plants - Answers cofactor of several enzymes
molybdenum functions - Answers nitrogen metabolism
Zinc form in plants - Answers protein cofactor
Zinc functions - Answers enzyme activator, hormone regulation
Iron form in plants - Answers protein cofactor, Fe-S cluster, chlorophyll, proteins
monoecious - Answers having male and female reproductive organs in the same plant
dioecious - Answers Having male and female reproductive organs in separate plants
protoplast - Answers Plant cell without a cell wall; used for transformation
Middle lamella is made up of - Answers calcium and magnesium pectate
middle lamella - Answers first formed layer of the cell wall
primary cell wall is composed of - Answers cellulose, hemicellulose, and pectin
secondary cell wall is made up of - Answers cellulose, hemicellulose, and lignin
without stress relaxation - Answers the synthesis of new wall materials would only thicken the
cell wall.
expansins - Answers the protein that loosens the cellulose-cellulose junction in the microfibrils
causing cell wall loosening.
What might happen for a plant if the SCW synthesis in xylem vessels has ceased? - Answers the
xylem would collapse due to suction pressure
oxidation - Answers Gain of oxygen,
Loss of Hydrogen,
Loss of electron:
Energy is released
reduction - Answers Loss of oxygen,
Gain of hydrogen,
Gain of electron:
Energy is used
low Km - Answers high affinity
high Km - Answers low affinity
Km equals - Answers the substrate concentration at 1/2 Vmax
Competitive Inhibitor - Answers similar to substrate in structure
Competitive Inhibitor - Answers do not affect Vmax
, Competitive Inhibitor - Answers increase Km
Competitive Inhibitor - Answers often end products of the reaction
Non-Competitive Inhibitor - Answers lowers Vmax
Non-Competitive Inhibitor - Answers does not affect Km
Nitrogen form in plants - Answers protein, nucleic acids, chlorophyll, hormones
Nitrogen functions - Answers most biological processes
Phosphorus form in plants - Answers DNA, RNA, ATP, sugar, membranes
phosphorus functions - Answers most biological processes
Potassium form in plants - Answers free ion
potassium functions - Answers enzyme regulator, osmo-regulator
Magnesium form in plants - Answers chlorophyll or free ion
magnesium functions - Answers photosynthesis, enzyme activator
Calcium form in plants - Answers in cell walls or as free ion
Calcium functions - Answers cell division, cross-links pectin in middle lamella
Boron form in plants - Answers in cell walls
boron functions - Answers cell division and growth
Sulfur form in plants - Answers amino acids, vitamin B, coenzyme A, Fe-S cluster
Sulfur functions - Answers most biological processes
Copper form in plants - Answers protein cofactor
Copper functions - Answers photosynthesis, respiration, redox reactions
molybdenum form in plants - Answers cofactor of several enzymes
molybdenum functions - Answers nitrogen metabolism
Zinc form in plants - Answers protein cofactor
Zinc functions - Answers enzyme activator, hormone regulation
Iron form in plants - Answers protein cofactor, Fe-S cluster, chlorophyll, proteins
