TLS Online TPP Program

#Question id: 3881


Which one of the following statements about mRNA stability is true?

#SCPH28 | Zoology
  1. Degradation always proceeds in the 5' to 3' direction.

  2. Degradation of mRNA by polynucleotide phosphorylase yields 5'-nucleoside monophosphates.

  3. In general, bacterial mRNAs have longer half-lives than do eukaryotic mRNAs.

  4. Secondary structure in mRNA (hairpins, for example) slows the rate of degradation.

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TLS Online TPP Program

#Question id: 9283

#SCPH06 I Botany

Organization of the protein complexes the photosystems I and II Are spatially separated in the thylakoid membrane, choose the correct arrangement of PSI and PSII on the membrane ;

a.) The PSI reaction centre and its associated antenna pigments and electron transfer proteins, as well as the coupling-factor enzyme that catalyzes the formation of ATP, are found almost exclusively in the stroma lamellae and at the edges of the grana lamellae

b.) The PSI reaction centre, along with its antenna chlorophylls and associated electron transport proteins, is located predominantly in the stromal lamellae

c.) The PSII reaction centre and its associated antenna pigments and electron transfer proteins, as well as the coupling-factor enzyme that catalyzes the formation of ATP, are found almost exclusively in the stroma lamellae and at the edges of the grana lamellae

d.) The PSII reaction centre, along with its antenna chlorophylls and associated electron transport proteins, is located predominantly in the grana lamellae

Which of the following given combination correct?

TLS Online TPP Program

#Question id: 9284

#SCPH05 I Biotechnology

Following are some facts regarding spatial separation of PSI and PSII. Which one would be INCORRECT?

TLS Online TPP Program

#Question id: 9284

#SCPH06 I Botany

Following are some facts regarding spatial separation of PSI and PSII. Which one would be INCORRECT?

TLS Online TPP Program

#Question id: 9285

#SCPH05 I Biotechnology

Non-O2-evolving (anoxygenic) organisms, contain only a single photosystem such as

TLS Online TPP Program

#Question id: 9285

#SCPH06 I Botany

Non-O2-evolving (anoxygenic) organisms, contain only a single photosystem such as

TLS Online TPP Program

#Question id: 9566

#SCPH06 I Botany

Which of the following adaptations helps kangaroo  rats conserve water?