* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download The work of Schleiden and Schwann can be summarized by saying
Survey
Document related concepts
Cell membrane wikipedia , lookup
Tissue engineering wikipedia , lookup
Signal transduction wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cell encapsulation wikipedia , lookup
Programmed cell death wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell growth wikipedia , lookup
Cell culture wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell nucleus wikipedia , lookup
Organ-on-a-chip wikipedia , lookup
Transcript
The work of Schleiden and Schwann can be summarized by saying that a. all plants are made of cells. b. all animals are made of cells. c. plants and animals have specialized cells. d. all plants and animals are made of cells. Which of the following is NOT a principle of the cell theory? a. b. c. d. Cells are the basic units of life. All living things are made of cells. Very few cells reproduce. All cells are produced by existing cells. You won’t find a cell wall in which of these kinds of organisms? a. b. c. d. plants animals fungi none of the above Which cell structure contains the cell’s genetic material and controls the cell’s activities? a. b. c. d. organelle nucleus cell envelope cytoplasm Which of the following contains a nucleus? a. b. c. d. prokaryotes bacteria eukaryotes organelles All viruses are made of proteins and a. b. c. d. nucleic acids. prophages. bacteriophages. endospores. Which organelles help provide cells with energy? a. b. c. d. mitochondria and chloroplasts rough endoplasmic reticulum smooth endoplasmic reticulum Golgi apparatus and ribosomes Which structure contains the other? a. b. c. d. nucleus; cytoplasm nucleus; genetic material cell membrane; cell wall prokaryote; organelles Which organelle would you expect to find in plant cells but not animal cells? a. b. c. d. mitochondrion ribosome chloroplast smooth endoplasmic reticulum The instructions for making new copies of a virus are a. a part of a virus’s capsid. b. coded in surface proteins attached to the protein coat. c. coded in either RNA or DNA. d. found only in bacteriophages. Which of the following organisms are prokaryotes? a. b. c. d. plants animals bacteria all of the above Which of the following is a function of the cytoskeleton? a. b. c. d. helps a cell keep its shape contains DNA surrounds the cell helps make proteins Prokaryotes lack a. b. c. d. cytoplasm. a cell membrane. a nucleus. genetic material. What is the basic structure of a virus? a. DNA or RNA surrounded by a protein coat b. a capsid surrounded by a protein coat c. a tail sheath surrounded by tail fibers d. a tiny cell surrounded by a cell wall The main function of the cell wall is to a. b. c. d. support and protect the cell. store DNA. direct the activities of the cell. help the cell move. Which organelle breaks down food into particles the cell can use? a. b. c. d. Golgi apparatus lysosome endoplasmic reticulum mitochondrion The cell theory applies to a. b. c. d. bacteria. plants and animals. multicellular organisms. all of the above Eukaryotes usually contain a. b. c. d. a nucleus. specialized organelles. genetic material. all of the above Why are viruses NOT considered to be living? a. They cannot reproduce on their own. b. They do not contain DNA or RNA. c. They are too small. d. They are really tiny robots sent from outer space.