Question

Indicate whether each of the following transport processes occurs via the mechanisms described as gated transport (G), transmembrane transport (T), or vesicular transport (V). Your answer would be a five-letter string composed of letters G, T, and V only, e.g. VTTTG.

(1) Import into nucleus
(2) Export from nucleus
( 3) Import into mitochondria
( 4) Return from Golgi to ER
( 5) Return from ER to cytosol

Answer 1

The five transport processes mentioned match to gated transport, gated transport, transmembrane transport, vesicular transport, and transmembrane transport respectively, resulting in a sequence of 'GGTVT'.

Step-by-step explanation:

The student is asking about the classification of various cellular transport processes into gated transport, transmembrane transport, or vesicular transport. We will match each of the five transport processes to one of these categories, forming a sequence of letters to answer the question:

(1) Import into nucleus - Gated transport (G)

(2) Export from nucleus - Gated transport (G)

(3) Import into mitochondria - Transmembrane transport (T)

(4) Return from Golgi to ER - Vesicular transport (V)

(5) Return from ER to cytosol - Transmembrane transport (T)

Therefore, the five-letter string that represents these processes is GGTVT.

Gated transport applies to movements into and out of the nucleus that occur through nuclear pore complexes that function as gates. Transmembrane transport describes the movement of molecules directly across the membrane, which is how proteins are brought into mitochondria. Finally, vesicular transport is used for movements between organelles, such as between the Golgi apparatus and the ER, or from the plasma membrane into the cell. This mode of transport relies on membrane-bound vesicles.