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TLS Online TPP Program

#Question id: 7303

The ‘quartet model’ explains how the protein products of the ABCE-function genes might interact to control floral organ identity. Following statements are based on this model. Which one of them is incorrect?

#I Life Science/ Life Sciences Group – I-V
  1. There are four combinations of floral MADS-box proteins. SEP proteins may form heterodimers with A (AP1) and B (AP3/ PI) proteins (for petals), B (AP3/PI) and C(AG) proteins (for stamens), and C (AG) protein (for carpels).
  2. All these genes, with the exception of AP2 (and its homologues), are MADS-box genes, a broad family of eukaryotic genes that encode transcription factors containing a highly conserved DNA-binding domain (MADS domain).
  3. The protein quartets are transcription factors and may function by binding to the promoter regions of target genes.

  4. According to the model, one dimer of each tetramer recognize two different sites on the same DNA strand, thus bringing these areas into proximity via DNA-bending.

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TLS Online TPP Program

#Question id: 2618

#SCPH01 Biochemistry

The three genes (lacZ, lacY, and lacA) are transcribed as a single mRNA from the promoter, these genes are expressed at high levels only when
TLS Online TPP Program

#Question id: 9197

#SCPH28 | Zoology

What is the biological significance of genetic diversity between populations?
TLS Online TPP Program

#Question id: 5050

#SCPH28 | Zoology

A stem cell capable of producing all the cell types of a lineage(embryonic and extraembryonic) is said to be-
TLS Online TPP Program

#Question id: 24450

#SCPH06 I Botany

Which of the following method to record an electrogram of the spontaneous electrical activity of the brain?
TLS Online TPP Program

#Question id: 3040

#SCPH28 | Zoology

Which of the following is electron source for lithotrophs microorganisms?