Practice Questions

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?

#Unit 5. Developmental Biology

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).
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).
The protein quartets are transcription factors and may function by binding to the promoter regions of target genes.
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.

More Questions

#Question id: 27404

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statement is correct regarding the Structural Lipids in Membranes

1.It acts as a barrier to the passage of polar molecules and ions

2.Membrane lipids are amphipathic: one end of the molecule is hydrophobic, the other hydrophilic

3.Membrane bilayers are formed only by the hydrophobic interaction only

4.Both hydrophobic and hydrophilic interactions are responsible for membrane bilayer formation

#Question id: 15120

#Unit 8. Inheritance Biology

Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans

The trait traced in the above pedigree chart is

#Question id: 18371

#Unit 12. Applied Biology

#Question id: 24528

#Unit 11. Evolution and Behavior

#Question id: 18671

#Unit 13. Methods in Biology