Questions: Correctly order the steps involved in cellular immunity: 1. The Tc recognizes the infected host cell 2. The Tc interacts with epitope presented by MHC-I on the dendritic cell 3. The Tc secretes perforin and granzyme, causing apoptosis 4. The helper T cell activates the Tc cell 2,1,3,4 1,2,4,3 4,2,1,3 2,4,1,3

Correctly order the steps involved in cellular immunity:
1. The Tc recognizes the infected host cell
2. The Tc interacts with epitope presented by MHC-I on the dendritic cell
3. The Tc secretes perforin and granzyme, causing apoptosis
4. The helper T cell activates the Tc cell

2,1,3,4
1,2,4,3
4,2,1,3
2,4,1,3

Transcript text: Correctly order the steps involved cellular immunity: 1. The Tc recognizes the infected host cell 2. The Tc interacts with epitope presented by MHC-I on the dendritic cell 3. The Tc secretes perforin and granzyme, causing apoptosis 4. The helper T cell activates the Tc cell View Available Hint(s) $2,1,3,4$ $1,2,4,3$ $4,2,1,3$ 2,4,1,3 Submit

Solution

The answer is the last one: 2, 4, 1, 3.

Explanation for each option:

$2,1,3,4$: This sequence is incorrect because it does not include the activation of the Tc cell by the helper T cell, which is a crucial step in cellular immunity.
$1,2,4,3$: This sequence is incorrect because the Tc cell must first interact with the epitope presented by MHC-I on the dendritic cell before recognizing the infected host cell.
$4,2,1,3$: This sequence is incorrect because the Tc cell must first interact with the epitope presented by MHC-I on the dendritic cell before the helper T cell can activate it.
2,4,1,3: This sequence is correct because it follows the proper order of steps in cellular immunity:
1. The Tc interacts with epitope presented by MHC-I on the dendritic cell.
2. The helper T cell activates the Tc cell.
3. The Tc recognizes the infected host cell.
4. The Tc secretes perforin and granzyme, causing apoptosis.

Summary: The correct order of steps involved in cellular immunity is 2, 4, 1, 3.

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