Practice Questions

TLS Online TPP Program

#Question id: 2120

Which one of the following statements about membranes is true?

#Unit 2. Cellular Organization

Most plasma membranes contain more than 70% proteins.
Sterol lipids are common in bacterial plasma membranes.
Sterol lipids are common in human cell plasma membranes.
The plasma membranes of all cell types within a particular organism have basically the same lipid and protein composition.

More Questions

#Question id: 28691

#Unit 2. Cellular Organization

ER targeting sequence___

#Question id: 28692

#Unit 2. Cellular Organization

#Question id: 28693

#Unit 2. Cellular Organization

There are some given statements about co-translational translocation in endoplasmic reticulum

a)SRP and the nascent polypeptide chain–ribosome complex bind to the integral membrane translocon

b)SRP and the nascent polypeptide chain–ribosome complex is strengthened by the binding of GTP to both the SRP and its receptor.

c)ER signal sequence emerges from the ribosome, it is bound by a signal recognition particle (SRP)

d)Hydrolysis of the bound GTP accompanies disassembly of the SRP and SRP receptor

e)Hydrolysis of the bound GTP initiates opening of the translocon, where translocation can take place

Which of the following statement is incorrect?

#Question id: 28694

#Unit 2. Cellular Organization

Which one of the following was first identified through mutations in the yeast gene and encoding a protein called Sec61α?

#Question id: 28695

#Unit 2. Cellular Organization

O-linked oligosaccharides is representing the attachment of glycoproteins to the hydroxyl (–OH) group in which amino acid residue?

#Question id: 28696

#Unit 2. Cellular Organization

N-linked oligosaccharide is attaching carbohydrate chain to the amide nitrogen of which amino acid residue?