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TLS Online TPP Program

#Question id: 10133

The PSI reaction center complex is a large multi-subunit complex in which the antenna chlorophylls are associated with the reaction center Components of the PSI reaction center are organized around as follows choose the incorrect one;

#Unit 6. System Physiology – Plant
  1. The core antenna and P700 are bound to two proteins, PsaA and PsaB, with molecular masses in the range of 66 to 70 kDa
  2. PSI reaction center are organized around two major core proteins, PsaA and PsaB. Minor proteins PsaC to PsaN are labeled C to N and then to a chlorophyll molecule (A0) to (A1) Phylloquinone
  3. Electron acceptors include a series of three membrane-associated iron–sulfur proteins, also known as Fe–S centers: FeSX, FeSA, and FeSB,  Fe–S center X is part of the P700-binding protein; centers A and B are the part of minor protein C
  4. PSI is a multisubunits contains two of them is D and E, which carry +ve charge towards the lumenal side 
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TLS Online TPP Program

#Question id: 23989

#Unit 1. Molecules and their Interaction Relevant to Biology

If your principal indulges in corruption and forces you to co-operate, how would you make compromise with such a superior fellow?
TLS Online TPP Program

#Question id: 809

#Unit 1. Molecules and their Interaction Relevant to Biology

A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which of the following double-stranded DNA molecules would denature at a lower temperature than the 40 base-pair double-stranded molecule described above?
TLS Online TPP Program

#Question id: 808

#Unit 1. Molecules and their Interaction Relevant to Biology

Which, if any, of the following statements is false?
TLS Online TPP Program

#Question id: 807

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following forces can stabilize a normal DNA double-helix?
TLS Online TPP Program

#Question id: 806

#Unit 1. Molecules and their Interaction Relevant to Biology

A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which characteristic does this double-stranded molecule have when it forms a B-DNA structure?
TLS Online TPP Program

#Question id: 805

#Unit 1. Molecules and their Interaction Relevant to Biology

miRNAs are encoded in the genome as segments of longer transcripts. Their characteristic structure helps identify them and predict the target genes they might regulate. Which of the following are the characteristic features of these small RNA molecules?

I. The functional form of an miRNA is typically 21 or 22 nucleotides (it can vary from 19 to 25 nucleotides).

II. The first cleavage liberates the stem-loop, called the pre-miRNA; the second generates the mature miRNA from the pre-miRNA.

III. The pre-miRNAs can be encoded by any part of a transcript: that is, they might fall within coding regions, within leader regions, or within Introns.

IV. The base pairing between miRNA and target RNA is initiated by interactions of so-called seed residues—the sequence between bases 2 and 9 of the 22-nucleotide miRNA.