Grade 7 Science Quiz #2 PDF

**Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Grade/Section: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Science 7** **Direction:** Identify the word being describe...

**Name: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Grade/Section: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** **Science 7** **Direction:** Identify the word being described in each item below. Choose your answer from the list of words in the box below and write it on the space provided. **Cell membrane** **Cell** ------------------- ------------------- **Nuclear DNA** **Peroxisome** **Vesicle** **Smooth ER** **Rough ER** **Centriole** **Cytosol** **Cytoskeleton** **Mitochondrion** **Lysosome** **Nucleus** **Ribosome** **Nucleolus** **Golgi complex** \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_1. Contains the cell\'s genetic material (DNA) and controls the cell\'s activities by regulating gene expression; acts as the command center of the cell. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_2. Contains enzymes that break down fatty acids and amino acids and detoxify certain chemicals, producing hydrogen peroxide as a byproduct, which is then converted to water. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_3. Studded with ribosomes and involved in protein synthesis and processing. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_4. Small structures that are the site of protein synthesis; they can be found floating freely in the cytoplasm or attached to the endoplasmic reticulum. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_5. Lacks ribosomes and is involved in lipid synthesis and detoxification processes. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_6. Small membrane-bound sacs that transport and store substances within the cell and can also aid in transporting materials to and from the cell surface. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_7. It is the basic unit of life. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_8. A semi-permeable membrane that surrounds the cell, providing protection and structure, and controlling the movement of substances in and out of the cell. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_9. Known as the powerhouse of the cell, mitochondria generate most of the cell\'s supply of ATP (energy) through cellular respiration. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_10. A structure within the nucleus responsible for producing and assembling ribosome components. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_11. Involved in cell division; helps in the formation of spindle fibers that separate chromosomes during mitosis. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_12. The jelly-like fluid inside the cell that holds the organelles and is the site of many metabolic reactions. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_13. A network of fibers that provides structural support for the cell, aids in cell movement, and helps transport materials within the cell. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_14. Contains the genetic blueprint for the organism, encoding instructions for protein synthesis and cell function. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_15. Modifies, sorts, and packages proteins and lipids for storage or transport out of the cell. \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_16-20. Contains digestive enzymes that break down waste materials, cellular debris, and foreign invaders like bacteria **Answer Key** 1. **Nucleus** 2. **Peroxisome** 3. **Rough ER** 4. **Ribosome** 5. **Smooth ER** 6. **Vesicle** 7. **Cell** 8. **Cell membrane** 9. **Mitochondrion** 10. **Nucleolus** 11. **Centriole** 12. **Cytosol** 13. **Cytoskeleton** 14. **Nuclear DNA** 15. **Golgi complex** 16. **Lysosome**