You know that the protein you want to purify from a natural source forms a multimer with multiple sub-units giving a molecular weight in solution much bigger than visualised denatured on SDS-PAGE. There is only a small amount of the target protein in the total protein sample. Which of the following is an appropriate purification strategy?

TLS Online TPP Program

#Question id: 1008

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is the correct order for the synthesis of dTMP?

TLS Online TPP Program

#Question id: 10317

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following are receptors for cholera toxin?

TLS Online TPP Program

#Question id: 10318

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following phospholipase generates lysophospholipids?

TLS Online TPP Program

#Question id: 10319

#Unit 1. Molecules and their Interaction Relevant to Biology

The membranous myelin sheath that surrounds and electrically insulates many nerve cell axons is particularly rich in

TLS Online TPP Program

#Question id: 10320

#Unit 1. Molecules and their Interaction Relevant to Biology

Following statements are regarding to archaeal lipids.

A. archaea have membrane lipids containing long-chain (32 carbons) branched hydrocarbons linked at each end to glycerol.

B. archaeal lipids are twice the length of phospholipids and sphingolipids, and can span the full width of the plasma membrane.

C. In archaeal lipids, at each end of the extended molecule is a polar head consisting of glycerol linked to either phosphate or sugar residues.

D. The glycerol moiety of the archaeal lipids is same as the stereoisomer as that in the lipids of bacteria and eukaryotes.

Which of the following statement is incorrect?

TLS Online TPP Program

#Question id: 10321

#Unit 1. Molecules and their Interaction Relevant to Biology

The human blood groups (O, A, B) are determined in part by the oligosaccharide head groups of these glycosphingolipids. Which of the following is correct?