Skills Worksheet. Directed Reading B. Section: Eukaryotic Cells. CELL WALL. 1.
What rigid structure surrounds a plant cell membrane and provides support to.
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Directed Reading B continued
Skills Worksheet
Directed Reading B
______ 7. What gives animal cells their shape? a. the cell wall b. the cytoskeleton c. the cell membrane d. the exoskeleton
Section: Eukaryotic Cells CELL WALL 1. What rigid structure surrounds a plant cell membrane and provides support to the cell?
NUCLEUS ______ 8. In eukaryotic cells, genetic material called DNA is found in a membrane-bound organelle called the a. nucleus. b. nucleolus. c. nucleotide. d. cytoplasm.
2. What are the cell walls of plants and algae made of?
CELL MEMBRANE ______ 3. What protective barrier separates a cell’s contents from the cell’s environment? a. the ribosomes b. the cytoskeleton c. the cell membrane d. the organelle ______ 4. What two layers make it difficult for materials to pass through the cell membrane? a. phospholipid layers b. cytoskeleton layers c. hydrophilic layers d. hydrophobic layers 5. How do materials, such as nutrients and waste, pass through the cell membrane?
______ 9. The function of proteins in a cell is to a. control chemical reactions. b. store genetic information. c. cover the nucleus. d. copy messages from DNA. ______ 10. A dark area of the nucleus where a cell begins to make its ribosomes is the a. mitochondrion. b. nucleolus. c. nucleotide. d. cytoplasm.
RIBOSOMES 11. Organelles that make proteins are called 12. Proteins are made of
. .
13. Why do all cells have ribosomes?
CYTOSKELETON ______ 6. A web of proteins in the cytoplasm of plant and animal cells is known as the a. phospholipid. b. cytoskeleton. c. cell membrane. d. organelle.
15. Endoplasmic reticulum (ER) that is covered with ribosomes is called
CELL COMPARTMENTS 23. The bubble that forms where a piece of the Golgi complex’s membrane
. 16. Endoplasmic reticulum (ER) that makes lipids and breaks down toxic
materials but lacks ribosomes is called
.
pinches off is called a(n)
.
24. What carries new protein from the ER to the Golgi complex and distributes material from the Golgi complex to other parts of the cell?
MITOCHONDRIA ______ 17. In a eukaryotic cell, the organelle in which sugar is broken down to release energy is the a. ribosome. b. lysosome. c. endoplasmic reticulum. d. mitochondrion. ______ 18. Cells do work using energy released by mitochondria and stored in a. ATF. c. ATP. b. ALT. d. DNA.
LYSOSOMES 25. What is a lysosome?
26. In what kind of cells are lysosomes mainly found?
27. What are three functions of lysosomes?
CHLOROPLASTS ______ 19. The organelles in plant and algae cells where photosynthesis takes place are called a. ribosomes. c. mitochondria. b. chloroplasts. d. chlorophyll. ______ 20. The process by which cells, such as plant cells, use sunlight, carbon dioxide, and water to make sugar and oxygen is called a. respiration. b. oxidation. c. photosynthesis. d. parthenogenesis. ______ 21. Chloroplasts are green because they contain a. sugar. c. chlorophyll. b. proteins. d. DNA.
VACUOLES ______ 28. Organelles in plant and animal cells that store digestive enzymes and aid in digestion within the cell are called a. vesicles. b. lysosomes. c. vacuoles. d. ribosomes. ______ 29. In plant cells, the organelle where water and other materials are stored and that helps support the cell is the a. endoplasmic reticulum. b. nucleolus. c. large central vesicle. d. large central vacuole.
