Insulin has an AB heterodimer structure with intrachain  and interchain disulfide bridges  such as___

I- One intrachain disulfide bridges (A6-A11) 

II- Two interchain disulfide bridges (A7-B7 and A20-B19)

III- two intrachain disulfide bridges (A6-A11 and A20-B19) 

IV- one interchain disulfide bridges (A7-B7 )

TLS Online TPP Program

#Question id: 14740

#Unit 4. Cell Communication and Cell Signaling

Rod cells sense light with the aid of a light-sensitive GPCR known as rhodopsin; choose incorrect statements

a. Rhodopsin consists of the protein opsin, which has the usual seven–transmembrane segment GPCR structure, covalently linked to a light-absorbing pigment called retinal. 

b. Rhodopsin, found only in rod cells, is localized to the thousand or so flattened membrane disks that make up the inner segment of each of these rod-shaped cells.

c. A human rod cell contains about 4 × 10⁷ molecules of rhodopsin. 

d. The heterotrimeric G protein coupled to rhodopsin, called transducin (Gt), contains a Gα unit referred to as Gαt; like rhodopsin, Gαt is found only in rod cells.

TLS Online TPP Program

#Question id: 14805

#Unit 4. Cell Communication and Cell Signaling

Secondary immune response to a hapten depends on the: 

TLS Online TPP Program

#Question id: 14806

#Unit 4. Cell Communication and Cell Signaling

Which is more immunogenic compound ?

TLS Online TPP Program

#Question id: 14807

#Unit 4. Cell Communication and Cell Signaling

For the stimulation of B-cell responses, lipids are used as haptens and attached to suitable carrier molecules such as the proteins keyhole limpet hemocyanin (KLH) or bovine serum albumin (BSA). If lipid plus KLH introduce in human body and activate immune system, after one month lipid and KLH injected in same person separately, antibody raised against?

TLS Online TPP Program

#Question id: 14808

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements is true ?

TLS Online TPP Program

#Question id: 14809

#Unit 4. Cell Communication and Cell Signaling

Indicate which of the following statements regarding haptens and carriers are true.