How cell parts work together to make and ship a protein

Grade 9 Science Worksheet - Building Confidence

Circle the best answer.

1. Read this first

   Use this

   Cell cutaway (animal cell, model, not to scale).

2. 1.

   Ari follows a protein that leaves the cell. Letter B is station 3, the folded sacs with tiny dots. What is B, and what does it do to the protein?

   • Nucleus: builds the new protein from amino acids
   • Rough ER: takes in the new protein and folds it
   • Rough ER: folds the protein, then sends it out of the cell alone
   • Golgi apparatus: builds the new protein from amino acids
3. 2.

   Bo traces a protein through the cell. Letter A is station 5, the stack of smooth curved sacs. What is A, and what does it do to the protein?

   • Golgi apparatus: modifies, tags and packages the protein
   • Golgi apparatus: builds the protein from amino acids
   • Rough ER: modifies, tags and packages the protein
   • Transport vesicle: a fixed part that modifies the protein

4. Use this

   Cell cutaway (animal cell, model, not to scale). The route has 7 stations, numbered 1 to 7, joined by arrows. Letter A marks the flat folded sacs studded with tiny dots, joined to the wall of the large round body (station 3). Letter B marks a small bubble between the dotted sacs and the stack of curved smooth sacs (station 4). Letter C marks the stack of curved smooth sacs, away from the dotted sacs (station 5). Letter D marks the thin outer boundary of the cell (station 7).

5. 3.

   Esme looks at letter B, station 4, the small bubble between the dotted sacs and the curved sacs. What is B, and what does it do?

   • Secretory vesicle: carries the protein from the rough ER to the Golgi
   • Transport vesicle: a fixed pipe that stays between the rough ER and Golgi
   • Transport vesicle: carries the finished protein from the Golgi to the membrane
   • Transport vesicle: carries the protein from the rough ER to the Golgi
6. 4.

   Cell cutaway (animal cell, model, not to scale). The protein ends up outside the cell. Jun follows a protein that leaves the cell. It passes the Golgi apparatus (A), the nucleus (B) and the rough ER (C). Which order is the route?

   • C, then B, then A
   • A, then B, then C
   • B, then C, then A
   • B, then A, then C

7. Use this

   Cell cutaway. Letter A marks the stack of curved smooth sacs, away from the dotted sacs. Letter B marks a small bubble between the stack of curved sacs and the cell edge. Letter C marks the thin outer boundary of the cell. The protein is released outside the cell.

8. 5.

   A protein leaves the cell. Kira lists the last three parts it meets: the Golgi apparatus (A), a secretory vesicle (B) and the plasma membrane (C). Which order is right?

   • A, then B, then C
   • A, then C, then B
   • B, then A, then C
   • C, then A, then B
9. 6.

   Cell cutaway (animal cell, model, not to scale). mRNA carries the message for a protein. Luz follows mRNA that carries the message for a protein. It passes the nucleus (A), a nuclear pore (B) and the rough ER (C). Which order is right?

   • Nuclear pore, then nucleus, then rough ER
   • Nucleus, then nuclear pore, then rough ER
   • Rough ER, then nuclear pore, then nucleus
   • Nucleus, then rough ER, then nuclear pore
10. 7.

    “Cell cutaway” Milo's job column says: ribosomes on this part build proteins for the cell to release. Which lettered part has this job?

    • Mitochondrion, letter A
    • Rough ER, letter C
    • Nucleus, letter B
    • Golgi apparatus, letter D

11. Use this

    Cell cutaway (animal cell, model, not to scale).

12. 8.

    Noah's job column says: this part makes ATP, the cell’s main energy-carrying molecule. Which lettered part has this job?

    • Nucleus, letter A
    • Mitochondrion, letter B
    • Golgi apparatus, letter C
    • Rough ER, letter D
13. 9.

    Pia's job column says: this part receives a protein, modifies it, tags it and packages it for shipping. Which lettered part is it?

    • Golgi apparatus, letter B
    • Rough ER, letter A
    • Plasma membrane, letter D
    • Secretory vesicle, letter C

14. Use this

    Route chart for a protein that leaves the cell (model, not to scale). The route has 7 stations, numbered 1 to 7, joined by arrows: 1 nucleus, 2 nuclear pore, 3 rough ER, 4 transport vesicle, 5 Golgi apparatus, 6 secretory vesicle, 7 plasma membrane.

15. 10.

    Tala studies the route chart. Which sentence about the route is true?

    • The plasma membrane is station 3, before either vesicle
    • Each station hands the protein on to the next one
    • The transport vesicle is a permanent part fixed beside the Golgi
    • The rough ER finishes the job alone and sends the protein out