Biology  by Bradford
support
Free · AP Biology · revision map

2.9 Cell Compartmentalization: revision map

The subtopic in the middle and four tasks round it: label a diagram, complete a table, put a process in order and fill 9 gaps. Every box rests on a learning objective of the topic in the AP Biology course and exam description. Type into the blanks and check them, or print it on A4, Letter or A3 with an answer key.

Unit 2 practice questionsThe whole Unit 2 map

Topic 2.9

Cell Compartmentalization

AP Biology ยท Unit 2 Cell Structure and FunctionName

2.9.BA secreted protein

Number the steps in order.

  1. A vesicle carries the protein to the Golgi apparatus.
  2. The vesicle fuses with the plasma membrane and releases the protein.
  3. A ribosome on the rough ER builds the polypeptide into the ER lumen.
  4. The protein is folded and modified in the ER.
  5. The Golgi modifies, sorts and packages it into a vesicle.

The membranes of the ER, Golgi, vesicles and plasma membrane form one connected system, the endomembrane system.

2.9.ACompartments and what they do

CompartmentWhat happens inside
hydrolytic enzymes work at a low pH, away from the rest of the cell
Mitochondrial Krebs cycle enzymes; ATP made across the inner membrane
proteins for export or membranes are made and folded
Chloroplast thylakoidslight reactions of photosynthesis
Topic 2.9Cell Compartmentalization

2.9.A, 2.9.BA mitochondrion

1234
  1. 1
  2. 2
  3. 3
  4. 4

2.9.AWhy compartments help

Membranes divide a cell into regions with different conditions. Enzymes and substrates can be kept at high concentration, and incompatible reactions are kept apart: a holds enzymes that would digest the cell if they were free. Folded membranes, such as the of a mitochondrion or the thylakoids of a chloroplast, give a large surface for the proteins of respiration and photosynthesis.

Word bank cristaeintermembrane spaceLysosomelysosomematrixouter membraneRough ER

Answer key

Every box on the sheet with its gaps filled in, as the subtopic reads in full.

  1. LabelA mitochondrion

    1. outer membrane
    2. cristae
    3. matrix
    4. intermembrane space

  2. TableCompartments and what they do

    CompartmentWhat happens inside
    Lysosomehydrolytic enzymes work at a low pH, away from the rest of the cell
    Mitochondrial matrixKrebs cycle enzymes; ATP made across the inner membrane
    Rough ERproteins for export or membranes are made and folded
    Chloroplast thylakoidslight reactions of photosynthesis

  3. GapsWhy compartments help

    Membranes divide a cell into regions with different conditions. Enzymes and substrates can be kept at high concentration, and incompatible reactions are kept apart: a lysosome holds enzymes that would digest the cell if they were free. Folded membranes, such as the cristae of a mitochondrion or the thylakoids of a chloroplast, give a large surface for the proteins of respiration and photosynthesis.

  4. OrderA secreted protein

    1. A ribosome on the rough ER builds the polypeptide into the ER lumen.
    2. The protein is folded and modified in the ER.
    3. A vesicle carries the protein to the Golgi apparatus.
    4. The Golgi modifies, sorts and packages it into a vesicle.
    5. The vesicle fuses with the plasma membrane and releases the protein.

    The membranes of the ER, Golgi, vesicles and plasma membrane form one connected system, the endomembrane system.