Across
- 3. a jellylike fluid inside the cell in which the organelles are suspended
- 7. Basic units of DNA molecule, composed of a sugar, a phosphate, and one of 4 DNA bases
- 10. a double-membrane-bound organelle found in most eukaryotic organisms
- 11. prepares to divide
- 12. cell organelle filled with enzymes needed to break down certain materials in the cell
- 13. a tiny cell structure that carries out a specific function within the cell
- 15. threads of genetic material formed from chromatin as a
- 17. strong layer around the cell membrane in plants, algae, and some bacteria
- 19. small particle in the cell on which proteins are assembled; made of RNA and protein
- 20. a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds
- 21. a part of the cell containing DNA and RNA and responsible for growth and reproduction
Down
- 1. a tiny cavity filled with fluid in the cytoplasm of a cell
- 2. monomer that makes up proteins; contains carboxyl and amino functional groups
- 4. ck of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum
- 5. System of internal membranes within the cytoplasm. Membranes are rough due to the presence of ribosomes. functions in transport of substances such as proteins within the cytoplasm
- 6. a unicellular organism having cells lacking membrane-bound nuclei
- 8. an organism with cells characteristic of all life forms except primitive microorganisms such as bacteria
- 9. no ribosomes are found on surface; contains collection of enzymes that perform special tasks that include the synthesis of membrane lipids and detoxification
- 11. thin, flexible barrier around a cell; regulates what enters and leaves the cell
- 14. protein that acts as a biological catalyst
- 16. naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells.
- 18. any of various organic compounds that are insoluble in water