Stats: Crop Phys Exam 2

General Stats

This quiz has been taken 5 times
The average score is 5 of 84

Answer Stats

Hint	Answer	% Correct
Dry matter accumulation/(unit ground area*time)	Crop growth rate	100%
Effective within cellular dimensions but is too slow for mass transport over long distances	Diffusion	100%
Breaks down ammonium	GS-GOGAT	100%
Weak electrostatic attraction between water molecules and other molecules that contain electronegative atoms	Hydrogen bonds	100%
Leaf area (one side) per unit ground area	Leaf area index	100%
Composition of absorbed water used in photosynthesis or other metabolic processes	1%	0%
Cytosolic concentration of K	100-200 mM	0%
Vacuolar concentration of K	10-200 mM	0%
Composition of absorbed water used for growth	2%	0%
C3 photosynthetic N use efficiency	23%	0%
C4 typical water loss per gram of CO2 gained	250-300g	0%
C3 typical water loss per gram of CO2 gained	400-500g	0%
CAM typical water loss per gram of CO2 gained	50-100g	0%
C4 photosynthetic N use efficiency	7%	0%
Stems water composition	70-85%	0%
Root water composition	70-90%	0%
Leaf tissue water composition	80-90%	0%
Composition of absorbed water transpired	97%	0%
Attraction of water to a solid surface	Adhesion	0%
Biological process by which reduced organic compounds are mobilized and subsequently oxidized in a controlled manner	Aerobic respiration	0%
Concerted movement of groups of molecules, most often in response to a pressure gradient	Bulk flow	0%
Band of radical cell walls in the endodermis that is impregnated with the wax-like, hydrophobic substance suberin	Casparian strip	0%
Gas bubble forms in column of water and expands until column collapses	Cavitation	0%
Degree to which a soil can absorb and exchange cations	CEC	0%
NAR*LAI	CGR	0%
Complete oxidation of pyruvate to CO2, generates reducing power (NADH, FADH2) and 1 ATP	Citric Acid Cycle	0%
Mutual attraction between 2 similar molecules	Cohesion	0%
LAI at which canopy first reaches maximum crop growth rate	Critical leaf area index	0%
Root uptake exceeds rate of replacement of nutrient	Depletion zones	0%
Spontaneous movement of substances from regions of higher to lower concentration	Diffusion	0%
Proportionality constant that measures how easily a substance moves through a medium, function of substance type/medium/temperature	Diffusion coefficient	0%
Unit of light interception per unit LAI	Extinction coefficient	0%
Nutrients involved in redox reactions	Fe, Zn, Cu, Ni, Mo	0%
Water content of a soil after it has been saturated with water and excess water has been allowed to drain	Field capacity	0%
GOGAT	Glutamine Oxoglutarate Aminotransferase	0%
GS	Glutamine Synthetase	0%
Export of sulfur assimilated in leaves to site of protein synthesis, important antioxidant, precursor to phytochelatins-detoxification of heavy metals	Glutathione	0%
Partial oxidation of sugars to organic acids, yields small amount of energy (ATP), and reducing power (NADH)	Glycolysis	0%
Carbohydrate conversion into hexose phosphates	Glycolysis phase one	0%
Energy conserving phase, triose phosphate oxidation and formation of pyruvate, release of ATP and NADH	Glycolysis phase two	0%
Gravity causes water to move downward unless the force of gravity is opposed by an equal and opposite force	Gravity potential	0%
Total amount of light energy converted into biochemical energy, Net photosynthesis + respiration in light	Gross photosynthesis	0%
Associated with the conversion of the non-structural products of photosynthesis into new structures such as structural carbohydrates, lipids, proteins, lignins, and organic acids	Growth respiration	0%
Very good at low concentrations	High-affinity transporter	0%
Critical LAI in place during period of highest solar energy, maintain active leaf area over the major portion of the solar energy peak	Highest Yield Potential	0%
Starter fertilizer, higher plant densities, more uniform plant spacing arrangement, weed control	Increasing light interception	0%
Nutrients that remain in ionic form	K, Ca, Mg, Cl, Ni, Mo	0%
Energy needed to separate molecules from liquid phase to gas	Latent heat of vaporization	0%
Area under the LAI curve	Leaf Area Duration	0%
Location of the driving force for water movement through plants	Leaves	0%
Very good at high concentrations	Low-affinity transporter	0%
Respiration associated with maintaining cellular integrity. The dominating processes are protein turnover, maintenance of ion gradients and intracellular transport processes	Maintenance respiration	0%
Can theoretically be accounted for by solute and pressure potential, but can't be easily separated into these, often omitted when considering water potential	Matric potential	0%
Dry matter accumulation/(unit leaf area*time)	Net assimilation rate	0%
Measure of the average photosynthetic efficiency of leaves in a crop community, doesn't account for photosynthesis in non-leaf parts	Net assimilation rate	0%
Rate of photosynthesis excluding material lost to respiration in the light. Rate observed during standard photosynthetic gas exchange measurements	Net photosynthesis	0%
Breaks down nitrate	Nitrate reductase	0%
Breaks down nitrite	Nitrite reductase	0%
Nutrients part of carbon compounds	N,S	0%
Mature plants sufficiently crowded to use all resources efficiently, yet not so crowded that some plants die or are unproductive, community production is optimized	Optimum plant density	0%
Movement of water across a selectively permeable membrane toward the region of more negative water potential	Osmosis	0%
Effect of dissolved solutes on water potential, reducing the free endergy of water by diluting the water	Osmotic potential	0%
Transfer of electrons from NADH (and related species) to oxygen and synthesis of ATP	Oxidative Phosphorylation	0%
Nutrients part of energy storage/structural integrity	P, B, (Si)	0%
Point at which the water potential of the soil is so low that plants cannot regain turgor pressure even if all water loss through transpiration ceases, water potential of the soil is less than or equal to the osmotic potential of the plant	Permanent wilting point	0%
Root axial resistance, root radical resistance, stem xylem resistance, leaf xylem resistance, stomata resistance, leaf outside xylem resistance	Plant hydraulic pathway	0%
Hydrostatic pressure of the solution	Pressure potential	0%
Amount of biomass accumulated per solar energy received during growing season.	Radiation use efficiency	0%
Depends on maintenance of biomass, growth, ion transport	Rate of transpiration	0%
Depends on the pressure gradient and soil hydraulic conductivity	Rate of water flow in soil	0%
Measure of the ease with which water moves through the soil, varies with soil type	Soil hydraulic conductivity	0%
Energy required to change temperature 1 degree C	Specific Heat	0%
Acts as a barrier to water and solute movement	Suberin	0%
High requirement for reducing agents to transform from sulfite to sulfide	Sulfur assimilation	0%
Maximum force per unit area that a continuous column of water can withstand before breaking	Tensile strength	0%
Two types of tracheary elements	Tracheids, vessel elements	0%
Difference in water vapor concentration between the leaf air space and the external air, the diffusion resistance of this pathway	Transpiration	0%
Positive hydrostatic pressure within cells	Turgor	0%
Allow proteins to cross the membrane without generating ATP	Uncoupling proteins	0%
Vessel elements stacked end to end form large conduits	Vessels	0%
Solute (osmotic) potential + pressure potential + gravity + matric potential	Water potential	0%
Mass flow, diffusion, crossing membranes by diffusion (across lipid bilayer or aquaporins)	Water transport from soil to roots	0%
Depend on driving forces and hydraulic conductivity	Water transport rates	0%
Apoplast, symplast, transmembrane	Water uptake pathways	0%

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Crop Phys Exam 2 - Statistics