biology cell test
define cytoplasm
A jellylike fluid inside the cell in which the organelles are suspended
all producers and consumers use the chemical process of respiration to synthesize
ATP
define nucleus
Control center of the cell
define cytoskeleton
Network of protein fibers that help the cell maintain its shape and allow it to move
Define mitochondria
Powerhouse of the cell
define chloroplasts
Site of photosynthesis, also contains green chlorophyll
Define Golgi Apparatus
Stack of membranes that modifies, sorts, and packages proteins and other materials for storage or release
the largest amount of DNA in a plant cell is contained in
a nucleus
which structures are found in every living cell?
a plasma membrane and cytoplasm
differences between plant cells and animal cells
animal cells are relatively smaller in size, have a irregular shape, and no cell wall,, plant cells are larger, have a regular shape and cell wall present
differences between plant and animal cells pt.2
animal cells have small vacuoles or none, and do not have chlorophyll, plant cells have large central vacuoles and do contain chlorophyll
similarities between plant cells and animal cells
both have a cell membrane surrounding the cytoplasm, both have a nucleus, both have a mitochondria
centrioles are cell structures involved primarily in
cell division
which statement is not a part of the cell theory?
cell parts such as chloroplasts are self replicating
which sequence of terms is in the correct order from simplest to most complex?
cells-> tissues-> organs-> organ systems
which organelle is correctly paired with its function?
chloroplast - serves as a site for photosynthesis
one difference between plant and animal cells is that animal cells do not have..
chloroplasts
which organelle usually present in plant cells is absent from the cells of onion tissues?
chloroplasts
how do human epithelial cells and elodea cells differ?
elodea cells have a cell wall and chloroplast, human epithelial cells have a small vacuole
define cell wall
found only in plant cells, used for support and protection
Define endoplasmic reticulum
internal membrane system where lipid components of cell membranes are made
what is a statement that best describes the plasma membrane of a living plant cell?
it selectively regulates the passage of substances into and out of the cell
the cell theory states that
living organisms are composed of cells that arise from preexisting cells
what is a statement that describes an exception to the cell theory?
mitochondria and chloroplasts contain genetic material and can replicate
which organelles must be present within a cell of a geranium leaf for respiration and photosynthesis to occur?
mitochondrion and chloroplast
Define lysosomes
organelle that breaks down organelles that are no longer useful
which is a sequence that shows a decreasing level of complexity?
organism-> organs-> tissues-> cells
in a cell, information that controls the production of proteins must pass from the nucleus to the..
ribosomes
define ribosomes
site of protein synthesis
define vacuole
storage site for sugars, proteins,minerals, pigments and wastes, helps to maintain pressure
what structures do human epithelial cells have in common with elodea cells?
they both have a cell membrane, nucleus and cytoplasm
what is the advantage of using a stain?
to enhance the visual of the cells
