Practice Questions

TLS Online TPP Program

#Question id: 552

Which of the following is true of the binding energy derived from enzyme-substrate interactions?

#Unit 1. Molecules and their Interaction Relevant to Biology

It cannot provide enough energy to explain the large rate accelerations brought about by enzymes.
It is sometimes used to hold two substrates in the optimal orientation for reaction.
It is the result of covalent bonds formed between enzyme and substrate.
Most of it is derived from covalent bonds between enzyme and substrate.

More Questions

#Question id: 28690

#Unit 2. Cellular Organization

A pathway of protein trafficking that flows through the ER is called____

#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?