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: 691

#Unit 1. Molecules and their Interaction Relevant to Biology

Roughly how many amino acids are there in one turn of an alpha helix?

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#Question id: 30056

#Unit 7. System Physiology – Animal

The highest arterial pressure in the arteries after blood has been ejected from the left ventricle during systole, known as:

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#Question id: 195

#Unit 1. Molecules and their Interaction Relevant to Biology

Vitamin C is a vitamin but not a coenzyme because it

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#Question id: 2375

#Unit 2. Cellular Organization

 Plastids that contain starch are called _________, whereas those that contain red and yellow pigments are called_________.

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#Question id: 1695

#Unit 4. Cell Communication and Cell Signaling

The processed peptide binding to the MHC class I groove: