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TLS Online TPP Program

#Question id: 29117

Light reactions of photosynthesis are carried out by four major protein complexes: Photosystem I (PSI), photosystem II (PSII), the cytochrome b6f complex and ATP synthase. The following are certain statements on PSII:
a. Red light absorbed by photosystem II (PSII) produces a strong oxidant and a weak reductant.
b. Far-red light absorbed by photosystem II (PSI) produces a weak oxidant and a strong reductant.
c. The strong oxidant generated by PSII oxidizes water,
d. The strong reductant generated by PSII oxidizes water
Which one of the following combinations of the above statements is correct?

#Unit 6. System Physiology – Plant
  1. a & b
  2. b & c

  3. a & c

  4. b & d

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TLS Online TPP Program

#Question id: 728

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following tile peaks with corresponding circular dichroism spectra

A. Alpha helixI. negative bands at 222 nm and 208 nm and a positive one at 190 nm.
B. Beta sheetII. negative band at 218 nm and a positive one at 196 nm.
C. Random coilIII. positive band at 212 nm and a negative one around 195 nm.
TLS Online TPP Program

#Question id: 729

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correct about the collagen triple-helix domain

a. is rich in glycine.                             b. is rich in proline.

c. is rich in hydroxyproline.                d. is an alpha helix.
TLS Online TPP Program

#Question id: 731

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following structure is mentioned in the given Ramachandran plot
TLS Online TPP Program

#Question id: 732

#Unit 1. Molecules and their Interaction Relevant to Biology

Ramachandran plots can help increase the accuracy of models derived from x-ray crystallography data. The plot below was created by measuring phi, and psi for each amino acid residue in a 2.2 A resolution crystal structure. In the plot, which excludes Gly and Pro residues, selected residues (dots) are numbered 1 through 5.

Which of the following statements can be correctly stated for this plot in reference to selected residues?

A. Residues 1 and 3 are in either B sheets

B. residue 2 is in a right-handed a helix, and residue 4 is in a left-handed a helix.

C. If residue 5 were Gly, it might be in an acceptable position in the plot
TLS Online TPP Program

#Question id: 733

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the statements on protein conformation, detailed below is INCORRECT?
TLS Online TPP Program

#Question id: 734

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements is true for two different tripeptides consisting of either glycine or proline?