Polytopic Proteins/multi-spanning membrane proteins typically have :

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#Question id: 18834

#Unit 13. Methods in Biology

A researcher is trying to alter five successive base pairs in the middle of a PCR amplified DNA fragments. Which technique is the most recommended for performing such experiment? 

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#Question id: 2344

#Unit 2. Cellular Organization

The release of insulin from certain human cells is an example of

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#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.

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#Question id: 33905

#Unit 2. Cellular Organization

E. coli DNA in vivo corresponds to an average density of 1 negative superhelical turn/200 bp it means it has 

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#Question id: 20338

#Unit 12. Applied Biology

Granule bound starch synthase I (GBSS l) is the main enzyme of amylose biosynthesis. Therefore ___________ activity of GBSS I is expected to increase the amylopectin content of starch