(1) The hydrolysis of ATP has a positive standard free energy change (∆G0)(2) The hydrolysis of ATP has a negative standardfree energy change (∆G0)To try and distinguish between your hypotheses, youmake some observations about thisreaction. For questions 29-32,
determine whether eachobservation is consistent withhypothesis 1 only, hypothesis 2 only, or both hypothesis1 and hypothesis 2.
Question 72:Observation1: The hydrolysis of ATP can occur spontaneouslyin a cell.Select one:
a. This observation is consistent with hypothesis1 only.
b. This observation is consistent with hypothesis2 only.
c. This observation is consistent with both hypothesis1 and hypothesis 2.
Question 73:Observation 2: Energy is released during the formationof new bonds in ADP and inorganicphosphate.Select one:
a. This observation is consistent with hypothesis1 only.
b. This observation is consistent with hypothesis2 only.
c. This observation is consistent with both hypothesis1 and hypothesis 2.
Question 74:Observation 3: The standard enthalpy change (∆H0)for ATP hydrolysis is negative.Select one:
a. This observation is consistent with hypothesis1 only.
b. This observation is consistent with hypothesis2 only.
c. This observation is consistent with both hypothesis1 and hypothesis 2.
Question 75:Observation 4: The standard entropy change (∆S0) forATP hydrolysis is +22, and thestandard enthalpy change (∆H0) for ATP hydrolysisis -14.Select one:
a.This observation is consistent with hypothesis 1only.
b.This observation is consistent with hypothesis 2only.
c. This observation is consistent with both hypothesis1 and hypothesis 2.
Question 76: Which of the above observations allows you to distinguish between your two hypotheses?Select one:
a. Observation 1
b. Observation
2c. Observation
3d. Observation
4e. None of thesePlatelet-derived growth factor (PDGF) is a small moleculesignal that binds to the surface ofcells and subsequently promotes cell growth and division.To respond to the PDGF signal,cells must express a PDGF receptor on their cell surfacein a specific orientation. The
diagram below shows the process of protein trafficking in the endomembrane system. ThePDGF receptor is shown on the cell surface, with itsreceptor domain facing outward and itssignaling domain facing inward. Use this informationto answer the following questions.
Question 77: Which of the following images correctlydepicts the configuration of the PDGFReceptor protein in relation to the endoplasmic reticulumfollowing translation?Select one:a. Image Ab. Image Bc. Image Cd. None of these
Question 78 T/F: A ribosome initially became boundto the mRNA encoding PDGF Receptorin the cytosol.Select one:
a. True
b. False
Question 79: The sequence for the mature PDGF ReceptormRNA is shown below. Thethree dots in the middle of the sequence indicatethat there are an additional 3,246 base
pairs in the middle of this RNA sequence that are not shown here, which can be assumed tonot contain any stop codons. Based on this image,how many total amino acids would youfind in the PDGF Receptor protein?Select one:a. 1,095b. 1,081c. 1,080d. 1,088e. 1,089f. None of these
Question 80: Which of the following changes to a codonwould you expect to be MOSTdamaging to the resulting protein?
Select one:a. UCA -> AGUb. AGC -> AGGc. GGU -> GGGd. CAG -> AACThe figures below show the light harvesting reactionsof photosynthesis and the CalvinCycle. Beneath the figures is a partial diagram ofthe redox reactions involved in the lightharvesting reactions of photosynthesis, going fromphotosystem II to photosystem I. Notethat photosystem II is made up of multiple smallercomponents indicated on the redoxreaction diagram.
Question 81: Adding a particular drug changes theredox potential of P700 from +420 to+310. Which of the following would you expect to observein plant cells treated with thisdrug?Select one:
a. Phe would accumulate in its reduced form.
b. ATP would continue to be produced.
c. Pc would accumulate in its oxidized form.
d. Levels of 3-phosphoglycerate would decrease.e. More than one of the above