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TLS Online TPP Program

#Question id: 7297

How is the ABC model for floral identity in Arabidopsis similar to the models for homeotic gene function derived from studies in Drosophila?

#I Life Science/ Life Sciences Group – I-V
  1. The key resposnsibility of homeotic genes in both is patterning of dorsal-ventral asymmetry.
  2. In both organisms, one homeotic gene is expressed at the two ends, a second expressed in to domains more central to that of the first and a third expressed more centrally, thus contributing unambiguous identities to all regions of the organism.
  3. In both organisms, homeotic genes interact, so that it is often the combination of genes present that is critical in specifying structure in adult.

  4. The ABC model of Arabidopsis is essentially identical to the Drosophila model for homeotic gene function, in that the Drosophila version of the A gene is abdominal-A, the Drosophila version of the B gene is Abdominal-B, and the Drosophila version of the C gene is Ultrabithorax.

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TLS Online TPP Program

#Question id: 413

#SCPH05 I Biotechnology

The hydrolysis of ATP has a large negative DG'°; nevertheless it is stable in solution due to:
TLS Online TPP Program

#Question id: 4564

#SCPH06 I Botany

Who would have proposed that the boundaries between each stratum mark the occurrence of different localized floods?
TLS Online TPP Program

#Question id: 7308

#SCPH28 | Zoology

In Arabidopsis thaliana, the transition to flowering involves multiple factors, pathways and meristem identity genes. Following statements regarding to the mechanism and function of meristem identity genes.

 A. FT mRNA is expressed in companion cells of the leaf vein in response to multiple signals, including day length, light quality, and temperature.

 B. The FT–FD complex activates AP1 in the inflorescence meristem and SOC1 in the floral meristem, which triggers LFY gene expression.

 C. LFY and AP1 trigger expression of the floral homeotic genes.

 D. FLC acts as a negative regulator of SOC1 in the meristem and as a negative regulator of FT in the leaves.

 Which of the following is incorrect?
TLS Online TPP Program

#Question id: 14128

#I Life Science/ Life Sciences Group – I-V

Alignment method suitable for aligning closely related sequences? 
TLS Online TPP Program

#Question id: 14851

#SCPH06 I Botany

From a pack of 52 cards two are drawn at random. The probability that one is a king and the other a queen is