A polymer is synthesized from an achiral amino acid. Conformation of the polymer can be investigated by the following techniques.

A. Fibre diffraction

B. Nuclear magnetic resonance spectroscopy

C. Circular dichroism spectroscopy.

D.Differential scanning calorimetry

Choose the combination which would indicate that the polymer adopts a helical conformation.

• A, C

• B, D

• A, B

• C, D

Sphingolipids (S) and Cholesterol (C) molecules of the lipid bilayer aggregate into lipid bilayer aggregate into multiple tiny rafts instead of a single large one. Considering that size of a lipid raft depends on the affinity of S and Cfor one another and other lipids in the membrane, choose the option that best describes this property.

• S and C bind to one another tightly and independent of any other lipid molecules.

• S and C bind to one another with same affinity as they bind to other lipid species of the membrane.

• S and C bind to one another with high affinity under the influence of some cytoskeletal elements.

• S and C have slightly higher affinity than other lipid molecules of the membrane and are in dynamic equilibrium with their free forms.

In a 100m race A beats B by 10m, B beats C by 5m. By how many meters does A beat C?

• 15.0 m

• 5.5 m

• 10.5 m

• 14.5 m

Suppose (i) "A*B" means " A is the father of B",(ii) "A Δ B" means "A is the husband of "B, (iii) "A ∇ B" means "A is the wife of B" and (iv) "A $\square$B", means "A is the sister of B". Which of the following represents "C is the father-in-law of sister of D"?

• $\mathrm{C}\nabla \mathrm{E}* \mathrm{F} \square \mathrm{D}$

• $\mathrm{C}*\mathrm{E}\nabla \mathrm{F} \square \mathrm{D}$

• $\mathrm{C}∆\mathrm{E}* \mathrm{F} \square \mathrm{D}$

• $\mathrm{C}*\mathrm{E}\nabla \mathrm{F} \square \mathrm{D}$

In the group of 11 persons, each shakes hand with every other once and only once. What is the total number of such hand shakes?

• 110

• 121

• 55

• 66

Path of a ray of light between two mirrors is shown in the digram. If the lenght of each mirror is 'l', what is the total path lenght of the ray between the mirrors?

• $\frac{3}{4}\mathrm{l}$

• $\frac{4}{3}\mathrm{l}$

• $\frac{3}{2}\mathrm{l}$

• 2l

What is the value of (1+3+5+7+.......+4033)+7903×2017?

• 20170000

• 20172017

• 20171720

• 20172020

What is the value of (1+3+5+7+......+4033)+7983 ×2017?

• 20170000

• 20172017

• 20171720

• 20172020

What is the last digit of (2017)²⁰¹⁷?

• 1

• 3

• 7

• 9

A librarian is arranging a thirteen volume encyclopedia on the shelf from left to right in the following order of volume numbers 8,11,5,4,9,1,7,6,10,3,12,2. In this pattern, where should the volume 13 be placed?

• Left most

• Right most

• Between 10 and 3

• Between 9 and 1