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39 Cards in this Set
- Front
- Back
All living things are composed of many cells.
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False
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A cell is the smallest unit that can carry on all the processes of life.
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True
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As a cell gets larger, its volume increases at a faster rate than its surface area
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True
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The long extension on nerve cells enable them to form a rigid scaffolding that gives brain tissue its structure
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False
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Membranes are selectively permeable if they allow only certain substances to diffuse across them.
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True
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Lysosomes carry on cellular respiration
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False
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Micotubules and microfilaments form the cytoskeleton of cells
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True
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The only difference between a plant cell and an animal cell is that plant cells have chloroplasts
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False
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Facilitated diffusion meves molecules and ions in one direction only, while active transport moves them in two directions
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False
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During the Process of exocytosis, the cell membrane extends to engulf substances that are too big to pass through the cell membrane.
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False
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Hooke's discovery of cells was made observing
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dead plant cells
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Surface area is an important factor in limiting cell growth because
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the cell maybecome too large to take in enough food and to remove enough waste.
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The size of which a cell can grow is limited by its
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surface area
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A cell that can change its shape would be well suited for
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moving to different tissues through narrow openings
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Which of the following is a characteristic of prokaryotes?
a.) they have a nucleus b.) they were found on Earth before eukaryotes c.) the organelles in their cytoplam are surrounded by membranes. d.) none of the above |
They were found on earth before eukaryotes.
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Which of the following is an example of a prokaryotic cell? A.)amoeba B.) virus C.) bacterium D.) liver cell
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Bacterium
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Studying a picture of a cell taken with an electron microscope, you find that the cell has no nucleus and no mitochondria, but it does have a cell membrane and a cell wall. You conclude that the cell is probably from a
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prokaryote
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Cell membranes
A. are only found on a small number of cells B. contain genes C. are made of DNA D. are thin covering that surround cells. |
are thin coverings that surround cells
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A protein that fits into the cell membrane
a. has two polar end sections that bond with water b. floats in the cell membrane c. has a nonpolar middle section. d. all of the above |
all of the above
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the cell membrane
a. encloses the contents of a cell. b. allows material to enter and leave the cell. c. is selectively permeable d. all of the above |
all of the above
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a particularly active cell might contain large number of
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mitochondria
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in which of the following organelles is a cell's ATP produced?
a. mitochondrion b. endoplasmic reticulum c. Golgi apparatus d. lysosome |
mitochondrion
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Numerous threadlike organelles that protrude from the surface of a cell and are packages in tight rows are called
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cilia
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Proteins are made in cells on the
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Nucleus
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The double membrane surrounding the nucleus is called the
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nuclear envelope
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All cells have
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a membrane, internal fluid that gives shape to the cell and supports the other things within it.
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The cell uses the mitochondria to
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produce energy
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Animal cells do not have a
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cell wall
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the organelles in plant cells that contain a green pigment are the
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chloroplasts
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Which of the following is not a speacialized activity found in cells of Volox colonies
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transmission of messages
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As a result of diffusion, the concentration of many types of substances
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eventually becomes balanced on both sides of a membrane
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Diffusion takes place
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from an area of high concentration to an area of low concentration
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Channels utilizing facilitated diffusion
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work in two directions.
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Which of the following does not expend energy
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diffusion
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The process by which water passes into or out of a cell is called
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osmosis
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Molecules that are too large to be moved across the cell membrane can be removed from the cell by
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exocytosis
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Molecules that are to large to be moved through the membrane can be trasported into th cell by
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endocytosis
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The statement that "cells are produced only from existing cells" is part of the
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Cell Theory
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The ration of surface are to volume puts limitation on a cell's
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Size
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