Cellulose microfibrils have an ordered structure and are synthesized at the plasma membrane, given characteristics of microfibrils;

a) Each microfibril is composed of an estimated 18 parallel chains of (1,4)-linked β-D-glucose chains tightly bonded to each other to form a crystalline microfibril

b) Microfibrils have hydrophilic surfaces, populated by polar –OH groups extending from theplane of the sugar rings

c) Microfibrils have hydrophobic surfaces, populated by nonpolar C–H groups populating thesides of stacked glucose chains

 d) microfibril important for enzymatic attack by microbial cellulases, which dock onto the hydrophobic surface and remove one glucan chain at a time

Which of the following from given characterstics of microfibrils is incorrect?

TLS Online TPP Program

#Question id: 2987

#Unit 2. Cellular Organization

Following statements are regarding the goals of gap phases.

(i) to prepare for the next phase of the cell cycle.

(ii) to check that the previous phase of the cell cycle has been completed appropriately.

(iii) to inhibits CDKs activity.

(iv) to enhance servillance mechanisms.

Which of the following is correct?

TLS Online TPP Program

#Question id: 15717

#Unit 11. Evolution and Behavior

 In The Origin of Species, Darwin propounded two major hypotheses:

TLS Online TPP Program

#Question id: 3987

#Unit 3. Fundamental Processes

A regulon is a(n):

TLS Online TPP Program

#Question id: 28037

#Unit 1. Molecules and their Interaction Relevant to Biology

Intrinsically disordered proteins have properties that are distinct from classical structured proteins, so which of the following's statements are true regarding Intrinsically disordered proteins 

(1) Intrinsically disordered proteins  lacks hydrophobic core

(2) Intrinsically disordered proteins have a hydrophobic core

(3) Intrinsically disordered proteins have high densities of charged amino acid residues such as Lys, Arg, and Glu

(4) Functional promiscuity is the characteristics of  Intrinsically disordered proteins are.

TLS Online TPP Program

#Question id: 11933

#Unit 7. System Physiology – Animal

The excitatory or inhibitory action of a neurotransmitter is determined by which of the following?