5 Written questions
5 Matching questions
- endoplasmic reticulum (ER)
- a An extensive membranous network in a eukaryotic cell, continuous with the outer nuclear membrane and composed of ribosome-studded (rough) and ribosome-free (smooth) regions.
- b An organelle found in plants and photosynthetic protists that absorbs sunlight and uses it to drive the synthesis of organic molecules (sugars) from carbon dioxide and water.
- c A process by which the mitochondria and chloroplasts of eukaryotic cells probably evolved from symbiotic associations between small prokaryotic cells living inside larger cells.
- d A stack of hollow disks formed of thylakoid membrane in a chloroplast. Grana are the sites where light energy is trapped by chlorophyll and converted to chemical energy during the light reactions of photosynthesis.
- e A macromolecule consisting of one or more polypeptides linked to short chains of sugars.
5 Multiple choice questions
- A substance in which the cells of an animal tissue are embedded; consists of protein and polysaccharides.
- A membrane-enclosed structure with a specialized function within a cell.
- A photograph taken through a microscope.
- A network of membranes inside and around a eukaryotic cell, related either through direct physical contact or by the transfer of membranous vesicles.
- A tiny membranous sac in a cell's cytoplasm carrying molecules produced by the cell. The vesicle buds from the endoplasmic reticulum or Golgi and eventually fuses with another membranous organelle or the plasma membrane, releasing its contents.
5 True/False questions
microtubule → The thickest of the three main kinds of fibers making up the cytoskeleton of a eukaryotic cell; a straight, hollow tube made of globular proteins called tubulins. Microtubules form the basis of the structure and movement of cilia and flagella.
plasmodesma → A digestive organelle in eukaryotic cells; contains hydrolytic enzymes that digest the cell's food and wastes.
nucleoid → A dense region of DNA in a prokaryotic cell.
cell theory → A protective layer external to the plasma membrane in plant cells, bacteria, fungi, and some protists; protects the cell and helps maintain its shape.
Vesicle → A sac made of membrane in the cytoplasm of a eukaryotic cell.