The Virtual Cell Worksheet: http://www.ibiblio.org ... - Free Printable

To solve this worksheet, we need to fill in the blanks with the correct biological terms based on the descriptions provided. Let's go through each question step-by-step.

1. Centrioles: The description says they are only found in *animal* cells. Their function is to help with cell *division* (specifically organizing the spindle fibers). They are made of tiny tubes called *microtubules*.
2. Lysosomes: These are called the *stomach* or *clean-up crew* of the cell. They are produced by the *Golgi apparatus* (or Golgi body). They contain *enzymes* that digest *waste*, *bacteria*, and *old cell parts*.
3. Chloroplasts: These are the site of *photosynthesis* in the *plant* cell. They contain the pigment *chlorophyll* which traps *light* energy. The membrane surrounding them is called the *double membrane* (or envelope). Inside, there are sacs called *thylakoids* (stacked into *grana*).
4. Mitochondria: These are the *powerhouse* of the *cell*. They are found in *both* plant and animal cells. The inner membrane is folded into *cristae*. Mitochondria convert *glucose* (or food energy) into *ATP* (usable energy) through *cellular respiration*.
5. Endoplasmic Reticulum (ER): There are two types: *Rough* ER (has ribosomes) and *Smooth* ER (no ribosomes). Ribosomes manufacture *proteins*. The rough ER makes *proteins*, while the smooth ER makes *lipids* (fats) and detoxifies *poisons*.
6. Smooth ER: As mentioned above, it makes *lipids* (or fats/oils) and helps with *detoxification* (removing poisons).
7. Cell Membrane: This controls what *enters* and *leaves* the cell. It is made of a *phospholipid* bilayer with *proteins* embedded in it. It provides *protection* and *support* for the cell.

Now, let's match these answers to the specific blanks in the image.

1. Centrioles
* Found in: animal cells
* Function: help with cell division
* Made of: microtubules

2. Lysosomes
* Called the: stomach (or clean-up crew)
* Produced by: Golgi apparatus
* Contain: enzymes
* Digest: waste, bacteria, and old cell parts

3. Chloroplasts
* Site of: photosynthesis
* In the: plant cell
* Contain pigment: chlorophyll
* Traps: light energy
* Surrounding membrane: double membrane
* Sac-like structures: thylakoids

4. Mitochondria
* Called the: powerhouse
* Found in: both plant and animal cells
* Inner membrane folds: cristae
* Convert: glucose (or food) into ATP
* Process: cellular respiration

5. Endoplasmic Reticulum (ER)
* Two types: Rough and Smooth
* Ribosomes manufacture: proteins
* Attached to: Rough ER
* Smooth ER makes: lipids (or fats) and detoxifies poisons

6. Smooth ER
* Makes: lipids (or fats)
* Helps with: detoxification

7. Cell Membrane
* Controls what: enters and leaves
* Made of: phospholipid bilayer
* Embedded with: proteins
* Provides: protection and support

Final Answer:
Here are the completed answers for the worksheet:

1. Centrioles
* Found in animal cells.
* Function: help with cell division.
* Made of tiny tubes called microtubules.

2. Lysosomes
* Called the stomach (or clean-up crew) of the cell.
* Produced by the Golgi apparatus.
* Contain enzymes that digest waste, bacteria, and old cell parts.

3. Chloroplasts
* Site of photosynthesis in the plant cell.
* Contain pigment chlorophyll which traps light energy.
* Surrounding membrane is the double membrane.
* Sac-like structures are thylakoids.

4. Mitochondria
* Called the powerhouse of the cell.
* Found in both plant and animal cells.
* Inner membrane folds are called cristae.
* Convert glucose into ATP through cellular respiration.

5. Endoplasmic Reticulum (ER)
* Two types: Rough and Smooth.
* Ribosomes manufacture proteins.
* Ribosomes are attached to the Rough ER.
* Smooth ER makes lipids and detoxifies poisons.

6. Smooth ER
* Makes lipids (fats).
* Helps with detoxification.

7. Cell Membrane
* Controls what enters and leaves the cell.
* Made of a phospholipid bilayer with proteins.
* Provides protection and support.