chalcone synthase (CHS) involved in biosynthesis of phenolic compound in plants. Following are some statements regarding the action of CHS;

 a) Chalcone synthase catalyzes the conversion of p-Coumaroyl-CoA into Chalcones

 b) Substrate for Chalcone synthase is chalcone

 c) CHS activity increased by environmental factors, such as light, and fungal infection

 d) Chalcone synthase is enzyme in flavonoid biosynthesis catalyzes stepwise condensation into p-Coumaric acid by using Malonyl-CoA molecules

 Which of the following combinations of above statement is true?

TLS Online TPP Program

#Question id: 27668

#Unit 1. Molecules and their Interaction Relevant to Biology

In a peptide bond the true electron density is intermediate. The barrier to C-N bond rotation/to keep the amide group planar requires of about

TLS Online TPP Program

#Question id: 27669

#Unit 1. Molecules and their Interaction Relevant to Biology

When Psi is fixed at +165º then allowed region -70º to -170º then this allowed region belong to 

(a) Left-handed helix

(b) Right-handed helix

(c) Parallel beta sheet 

(d) Antiparallel beta sheet

Choose which of the following is correct 

TLS Online TPP Program

#Question id: 27670

#Unit 1. Molecules and their Interaction Relevant to Biology

When Phi is fixed at -80º. Clashes occur at all Psi angles except: 

(a) +10º to -55º for alpha helix

(b) +10º to -55º for beta strand 

(c) +90º to 180º for alpha helix

(d) +90º to 180º for beta strand

Choose which of the following is correct

TLS Online TPP Program

#Question id: 27671

#Unit 1. Molecules and their Interaction Relevant to Biology

The range for Pro residues cyclic side chain has

TLS Online TPP Program

#Question id: 27672

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following Ramachandran plot showing correct graph for trans-proline possible phi and psi positions

TLS Online TPP Program

#Question id: 27673

#Unit 1. Molecules and their Interaction Relevant to Biology

Some statements regarding the Domain is given    

(a) Domains are formed by combinations of SS, SSS, motifs and connected by loops and turns

(b) They are highly conversed and may be common in most unrelated proteins

(c) They do not evolve

(d) Can not function Independently

Choose the incorrect of the following