Question

review vocabulary
choose the letter of the best answer.

1. proteins that will be released from the cell are assembled at the

a. central vacuole.
b. mitochondria.
c. rough endoplasmic reticulum.

1. the diffusion of water through a selectively permeable membrane is called

a. homeostasis.
b. pinocytosis.
c. osmosis.
match the vocabulary term to its definition.

1. a cell that has dna but no nucleus.

a. receptor

1. a complex of protein and rna that assembles proteins.

b. prokaryote

1. a protein on or in a cell that binds a chemical signal.

c. ribosome
review key questions
provide evidence and details to support your answers.

1. what are the three main parts of the cell theory?
2. plants and animals are both made up of eukaryotic cells. does this mean they have the same kinds of organelles? why or why not?
3. a cell makes and secretes a certain protein. explain where it is made, how it is secreted from the cell, and what kind of transport is used.
4. why do prokaryotes not have cell specialization?

Explanation:

For question 1: Proteins for release are made at rough endoplasmic reticulum (has ribosomes for protein synthesis). Central vacuole stores substances, mitochondria produce energy.
For question 2: Osmosis is water diffusion through selectively permeable membrane. Homeostasis is maintaining stable internal conditions, pinocytosis is cell drinking.
For question 3: Prokaryote has DNA but no nucleus.
For question 4: Ribosome is protein - RNA complex for protein assembly.
For question 5: Receptor is protein binding chemical signal.
For question 6: Cell theory parts - all living things made of cells; cells basic unit of life; new cells from existing cells.
For question 7: Plants and animals have some common organelles (e.g., mitochondria, nucleus) but plants have chloroplasts (for photosynthesis) and large central vacuole (for storage), animals have centrioles (in cell division).
For question 8: Protein made at ribosomes (on rough ER or free). Secreted via exocytosis: protein in vesicles fuses with cell membrane.
For question 9: Prokaryotes are single - celled. Specialization requires cell - cell communication and complex multicellular structures which prokaryotes lack.

Answer:

1. C. rough endoplasmic reticulum
2. C. osmosis
3. b. prokaryote
4. c. ribosome
5. a. receptor
6. All living things are made of cells; cells are the basic unit of life; new cells come from existing cells.
7. No. They share some (e.g., mitochondria, nucleus) but plants have chloroplasts and large central vacuole, animals have centrioles.
8. Made at ribosomes. Secreted via exocytosis (vesicle - membrane fusion).
9. Prokaryotes are single - celled; specialization needs multicellular complexity and cell - cell communication they lack.