Practice Questions

TLS Online TPP Program

#Question id: 887

Polypeptides fold rapidly by a stepwise process, how does the polypeptide chain arrive at its native conformation?

#Part-B Specialized Branches in Biotechnology

proteins appear to fold in a hierarchical manner, with small local elements of structure forming and then to yield larger elements, which coalesce with other such elements to form yet larger elements and converted into its native conformation
A protein-folding pathway has been highly successful in predicting the three-dimensional structure of small proteins from their amino acid sequence atleast 156 amino acid residue that have acquired their final structure
Vander waal interaction play a significant role throughout the process, as the aggregation of nonpolar amino acid side chains provides an entropic stabilization to intermediates and, eventually, to the final folded structure
The native conformation of the protein folding by stepwise manner such as unfolded→transition state→molten globule→folded conformation by decreasing the free energy

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TLS Online TPP Program

#Question id: 21728

#Part-B Specialized Branches in Biotechnology

In the reaction A → products, we find that when [A] has fallen to half of its initial value, the reaction proceeds at the same rate as its initial rate. Is the reaction zero order, first order, or second order?

TLS Online TPP Program

#Question id: 21729

#Part-B Specialized Branches in Biotechnology

In the reaction, A → products, with the initial concentration [A]0 = 1.512 M, [A] is found to be 1.496 M at t = 30 s. With the initial concentration [A]0 = 2.584 M, [A] is found to be 2.552 M at t = 1 min. What is the order of this reaction?

TLS Online TPP Program

#Question id: 21731

#Part-B Specialized Branches in Biotechnology

The smog constituent peroxyacetyl nitrate (PAN) dissociates into peroxyacetyl radicals and NO2(g) in a first order reaction with a half-life of 32 min.

If the initial concentration of PAN in an air sample is 2.7×10¹⁵ molecules/L, what will be the concentration 2.24 h later?

TLS Online TPP Program

#Question id: 21733

#Part-B Specialized Branches in Biotechnology

A rate law __________.

TLS Online TPP Program

#Question id: 21735

#Part-B Specialized Branches in Biotechnology

Given the following equation (2A+B  3C). Which of the following correctly displays the rate of the reaction?

III. Δ[C]/3Δt

TLS Online TPP Program

#Question id: 21735

#Part-A Aptitude & General Biotechnology

Given the following equation (2A+B  3C). Which of the following correctly displays the rate of the reaction?

III. Δ[C]/3Δt