Following statement regarding to the cascade of regulated RNA splicing controls drosophila sexual differentiation.

A. The Sex-lethal (Sxl) protein, encoded by the sex-lethal gene, is the first protein to act in the cascade and present only in female embryos.

B. Early in development, the Sxl gene is transcribed from a promoter that functions only in male embryos.

C. Later in development, this male-specific promoter is shut off, and another promoter for sex-lethal becomes active in both male and female embryos.

D. In male embryos, however, in the absence of early Sxl protein, exon 3 of the sex-lethal pre-mRNA is spliced to exon 2 to produce an mRNA that contains a stop codon early in the sequence.

Which of the following is correct?

TLS Online TPP Program

#Question id: 27575

#Unit 1. Molecules and their Interaction Relevant to Biology

Which kind of interactions occur between the side chains of oppositely charged residues as well as between the NH3+ and COO− groups at the ends of polypeptide

TLS Online TPP Program

#Question id: 27573

#Unit 1. Molecules and their Interaction Relevant to Biology

Interaction type, Distance dependence of potential energy, and Typical energy (kJ mol-1) are given

Match them correctly

TLS Online TPP Program

#Question id: 27569

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the most prominent type of interaction found between two molecule of water

TLS Online TPP Program

#Question id: 27080

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement about Vander-wall interaction  

1. Van der Waals potential (E_vdw) is the sum of all interactions over all atoms

2. Van der Waals potential (E_vdw)  is calculated by

3. This type of interaction is often called a 6–12 interaction, or the Leonard Jones potential.

4. Van der Waals forces are extremely weak, especially when compared with other forces influencing protein conformation

TLS Online TPP Program

#Question id: 27079

#Unit 1. Molecules and their Interaction Relevant to Biology

The van der Waals interaction as a function of interatomic distance r, then which of the following equation is correct 

TLS Online TPP Program

#Question id: 27077

#Unit 1. Molecules and their Interaction Relevant to Biology

The van der Waals interaction as a function of interatomic distance r (on x axis) which of the following graph is correctly representing the relation between attractive and repulsive region vs interatomic distance r