7th Grade Science                Cells                                            Name:__________________

 

1. Part of the cell providing energy:

a) nucleus        b) mitochondria        c) endoplasmic reticulum      d) chromosomes

 

2. Contain the DNA, genes, and instructions for the cell:

            a) chromosomes     b) cytoplasm      c) vacuole       d) cell wall

 

3. Which is a major difference between plant and animal cells?

            a) Plant cells move less                         b) Only plant cells have cell walls

            c) Only plant cells have chloroplasts                  d) All of these

 

4. Jelly-like fluid filling the inside of living cells:

            a) chromosomes     b) cytoplasm      c) nucleus       d) cell wall

 

5. The nucleus contains:            a) nucleolus                  b) chromosomes

                                                c) DNA                        d) all of these

 

Label the following in the drawing:

(Draw your own arrows!)

 

6. Cell Membrane

7. Endoplasmic Reticulum

8. Vacuole

9. Chromosomes

10. Nucleolus

11. Nucleus

12. Cytoplasm

 

The mitochondria has already been labeled as an example.

 

 

 

13. Wood is a large collection of which material?

            a) DNA            b) Water          c) Cell Walls                 d) Fat

 

14. Which instrument did we use in the lab this week?

            a) Triple beam balance     b) Beaker    c) Microscope    d) Graduated cylinder’’

 

15. Describe what we did in lab this week:

Read the article and answer the questions below it.

 

Mitochondria provide the energy a cell needs to move, divide, produce secretory products, contract - in short, they are the power centers of the cell. They are about the size of bacteria but may have different shapes depending on the cell type.

 

Mitochondria are membrane-bound organelles, and like the nucleus have a double membrane. The outer membrane is fairly smooth. But the inner membrane is highly convoluted, forming folds called cristae. The cristae greatly increase the inner membrane's surface area. It is on these cristae that food (sugar) is combined with oxygen to produce ATP - the primary energy source for the cell.

 

16. This article is about which part of the cell? ______________________________

 

17. What job does this part of the cell do?

 

 

 

 

 

 

18. What is its size?

 

 

 

 

 

19. How many membranes does it have? __________

 

 

20. It puts out energy for the cell in the form of  ______________________

            (hint: 3 letters)