A limiting factor for viral infection is

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#Question id: 18595

#Unit 11. Evolution and Behavior

Which animal reptiles exist in the Permian periods of Paleozoic era?

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#Question id: 3895

#Unit 3. Fundamental Processes

Which one of the following types of eukaryotic regulatory proteins interact with enhancers?

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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: 12740

#Unit 13. Methods in Biology

Choose the incorrect statement for Agglutination.

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#Question id: 2965

#Unit 2. Cellular Organization

In a diploid cell with 5 chromosome pairs (2n = 10), how many centromeres will be found in a nucleus at G2 of the cell division cycle?