Biology Crossword Puzzle

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

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