laura

1. An increase in root pressure will result in the rapid release of abscisic acid (ABA) and the subsequent opening of the stomata.

True

False

2. A decrease in the availability of ATP in a root cell could decrease the water potential of the cell.

True

False

Describe each stage by stating the inputs that go into and the outputs that are produced in each stage. Also, state where in the chloroplast each stage takes place

by stating the three main inputs that are needed for the process to occur and the two main outputs that are produced by the process.

A site at the 5' end of a gene where RNA polymerase attaches to initiate transcription is called a(n).

operon.

repressor.

promoter.

operator.

You are studying the effects of transcription factors on the activation of gene expression. However, when first starting your study you notice that some of the transcription factors bind further away from the DNA that it is aiming to transcribe. What description best explains this?

The transcription factor transcribes small RNAs that then bind to the promoter and activate the gene s expression.

Signals originate via inducers from the transcription factor to the site of promotion that activate transcription of the gene.

DNA looping transports the transcription factor closer to the promoter and initiates gene transcription.

The assistance of RNA looping moves the transcription factor closer to the promoter.

A “dead” 12-Volt lead/acid storage battery has 6.90 g of PbSO4 (molar mass = 303.3 g), deposited on its electrodes. To recharge it, a “trickle charger” is attached to the Pb anode that supplies 0.140 amperes of current at a voltage of 13.0 V. Calculate how much time it would take to convert all the PbSO4 back into SO42− ions in solution. Enter your answer in hours.

Indicate whether the following reactions will occur or not.

Pb(s)+Zn2+(aq) →

Al(s)+Cr3+(aq) →

Cd(s)+Sn2+(aq) →

Mg(s)+Au3+(aq) →

Ni(s)+Mn2+(aq) →

**need help w number 2!!! please:)

1.Use the tabulated thermodynamic data to find ΔGo, in kJ. (enter your answer to 4 significant figures)

answer: 142.3

2.Now calculate ΔGo1200 for this process when it occurs at 1200 K, in kJ. (enter your answer to 4 significant figures)

hint:Use the relationship DeltaG = DeltaH - T*DeltaS?

a)Use the tabulated thermodynamic data to find ΔGo, in kJ

b)Now calculate ΔGo1200 for this process when it occurs at 1200 K, in kJ

If 450 ml of some Pb(NO3)2 solution is mixed with 250 ml of 1.30 x 10-2 M NaCl solution, what is the maximum concentration of the Pb(NO3)2 solution added if no solid PbCl2 forms? (Assume Ksp = 2.00 x 10-5 M at this temperature.) Enter the concentration in M.

When equilibrium is reached, 0.45 mol of CO(g) is in the container.

Find Keq at this temperature for the following reaction:

H2(g) + CO2(g)↔H2O(g) + CO(g)

Express this concentration in terms of molality.

Express the concentration of the solute from the problem above as a mole fraction.

(Assume vitamin C does not ionize in water).

If the microwaves in an oven have a wavelength of 3.00 mm, how many photons are needed to heat 100.0 g of water at 25oC to 100oC

if the final temp of the water and the piece of metal is 29C, determine the specific heat of the metal.

If you were to react 52.9g of potassium chlorate with excess red phosphorus, what mass of tetraphosphorus decaoxide (P4O10) would be produced?

KClO3 + P4 = P4O10 + KCl