Organelle

3. membrane at the boundary of every cell that acts as a selective barrier
4. structures made up of proteins known as tubulins and maintain cell shape and cell division in animal cells
5. enzymes that transfer hydrogen atoms from various substrates to oxygen
7. small rod like structure present in numbers in the cytoplasm of many eukaryotic cells
9. network of fibers that is throughout the cytoplasm serves by transporting and mechanical and signaling functions
11. site that serves as cellular respiration and use oxygen to break down organic molecules and ATP
12. layer that protects the cells of plants
13. portion of the endoplasmic reticulum that is free of ribosome
16. cell with a membrane-enclosed nucleus and membrane-enclosed organelles
17. that lacks a nucleus and organelles
20. membrane-enclosed sac of hydrolytic enzymes found in the cytoplasm of animal cells and some protist

1. atoms center that contains genetic material
2. structures that live within a cell
6. long cellular appendage specialized for locomotive
8. structures made of RNA and protein that use DNA or RNA instructions to produce proteins
10. cell the consists of flat membranous sacs of modifies and stores and routes products to ER
14. membrane-bounded vesicle whose specialized functions varies in different types of cells
15. intercellular junction in animal cells that acts a a pathway and to fastens cells together
18. portion of the endoplasmic reticulum with ribosomes attach
19. cell that causes photosynthesis