The organelle that digests food particles, wastes, cell parts, and foreign invaders Vacuole Lysosome Cytoplasm Ribosome
In plant cells, this stiff wall surrounds the cell membrane, giving the cell a rigid, boxlike shape. Cell Wall Cell Membrane Vacuole Nuclear Envelope
Thin, flexible barrier around a cell, it regulates what enters and leaves the cell Cell Wall Golgi Apparatus Cell Membrane Nucleus
Vacuole Ribosome Cell Membrane Nucleus The control center of the cell that directs the cell's activities; it contains the chemical instructions that direct all the cell's activities (DNA) Vacuole Ribosome Cell Membrane Nucleus
Cells that do not have a distinct nucleus are called: Prokaryotic Eukaryotic Multicellular Animal
The jellylike fluid that contains nutrients in a cell is the: Cytoplasm E.R. Golgi Apparatus Lysosome
Small organelles that are responsible for protein synthesis are the: Nucleus Ribosomes Cytoplasm Cell Membrane
The ‘powerhouse’ of the cell that generates the cell’s energy Chloroplast E.R. Golgi Apparatus Mitochondria
The organelle found in both animal and plant cells that is clear but contains dissolved nutrients is the: Centriole Chloroplast Vacuole Cell Membrane
Cells that have internal membranes surrounding specialized organelles are: Bacteria Cells Eukaryotic Prokaryotic Unicellular
Which of the following statements is false All living things are made of cells. Animal cells have a cell membrane and a cell wall. Cells come from other cells. Lysosomes are found only in animal cells.
To enter or leave a cell, substances must pass through A microtubule Golgi apparatus Ribosome Cell Membrane
Golgi apparatus Ribosome Mitochondria Nucleus lysosome The pancreas is an organ that creates the protein insulin. Which organelle in a pancreas cell packages insulin to be secreted out of the cell? Golgi apparatus Ribosome Mitochondria Nucleus lysosome
What cell structure makes it possible for the internal environment of a cell to differ from the external environment? Cell wall Cell membrane E.R. cytoplasm
Which of the following are all present in animal cells mitochondria, cell membrane, cell wall, cytoplasm chloroplasts, cytoplasm, vacuole, nucleus nucleus, cell membrane, mitochondria, cytoplasm vacuole, cell membrane, nucleus, mitochondria
Centrioles are present in _____. Animal cells only Plant cells only In both plant and animal cells In neither plant nor animal cells
The 'Scavengers' or 'Digestive bags' of a cell are ____. Chromosomes Centrosomes Lysosomes Ribosomes
The network of endoplasmic reticulum is present in the ____. Nucleus Chromosome Cytoplasm Golgi apparatus
Centrioles are associated with ____________. Digestion Reproduction Respiration Cell division
Bacterial cells are prokaryotic; in comparison to a typical eukaryotic cell they would be smaller. have a smaller nucleus. lack a plasma membrane. have a greater variety of organelles.
Proposed that cells are produced by other cells Robert Hooke Rudolf Virchow Schwann Schleiden
All things are made of cells, -cell is basic unit of life, -new cells come from existing cells Theodor Schwann Robert Hooke cell theory Rudolf Virchow
Discovered that plants are made of cells Theodor Schwann Prokaryotic cells cell theory Matthias Schleidan
They will expand but not burst. None of the above. A 0.9% NaCl solution is isotonic to red blood cells. Which of these describes the results if red blood cells are placed into a 9% solution of NaCl? They will burst. They will shrink. Nothing will happen. They will expand but not burst. None of the above.
Water will move from the right to the left. The U-shaped tube in the figure below is divided by a membrane that is impermeable to starch but permeable to water. Which of the following will occur? Water will move from the right to the left. Water will move from the left to the right. Starch will move from the right to the left. Starch will move from the left to the right. Nothing will happen. The membrane blocks the passage of all the molecules.
Where do new cells come from? A. From the lymph glands. B. From preexisting cells C. From food molecules in the digestive tract. D. From the blood
A. active transport B. diffusion C. mitosis D. osmosis Which process requires a cell to use energy to move materials across its membrane when a concentration difference does not exist? A. active transport B. diffusion C. mitosis D. osmosis
Why must homeostasis be maintained in a cell? A. Water will enter the cell if homeostasis is not maintained. B. Salt will leave the cell if homeostasis is not maintained. C. Wastes, water and nutrients must stay in the correct balance. D. The cell membrane will lose the lipid bi-layer without homeostasis.