Question

part b: the shapes below represent bacterial cells. illustrate the lytic cycle by drawing a simple bacteriophage on cell 1 and the subsequent changes that occur within each stage. 1 - attachment 2 - entry 3 - synthesis 4 - assembly 5 - release/lysis © a-thom-ic science 2017. for classroom use only. do not post online.

Explanation:

To illustrate the lytic cycle:

1. Attachment (Cell 1): Draw the bacteriophage (hexagonal head, tail fibers) attaching to the bacterial cell’s surface.
2. Entry: Draw the phage injecting its genetic material (e.g., a line or squiggle) into the bacterial cell (the cell now has the phage DNA inside, and the phage “shell” remains outside).
3. Synthesis: Draw the bacterial cell with new phage parts (multiple small phage heads/tails) being produced (the cell’s interior is filled with phage components, and the bacterial DNA is degraded or replaced).
4. Assembly: Draw the phage parts assembling into complete bacteriophages (multiple full phages inside the bacterial cell).
5. Release/Lysis: Draw the bacterial cell rupturing (cell wall broken) with new phages being released (phages outside the now-destroyed cell).

Answer:

• Stage 1 (Attachment): Draw a bacteriophage (hexagonal head, tail fibers) on the surface of Cell 1.
• Stage 2 (Entry): Draw the phage’s genetic material (e.g., a line) entering Cell 1, with the phage “capsid” (outer structure) remaining outside.
• Stage 3 (Synthesis): Draw Cell 1 with multiple small phage components (heads, tails) inside (bacterial DNA is degraded, and phage parts are synthesized).
• Stage 4 (Assembly): Draw Cell 1 with multiple complete bacteriophages (fully formed phages) inside.
• Stage 5 (Release/Lysis): Draw Cell 1 rupturing (broken cell wall) with new bacteriophages released outside the cell.