lesson 12
it contains coded information
What characteristic is completely unique about DNA?
it contains 46 chromosomes each strand contains the chromosomes from one parent
Which statements are correct concerning human DNA?
because the external water concentration is greater because the external salt concentration is less
Why will external fluid flow into a plant cell?
chromosomes
contain genes with the information controlling cell
animal cell
no cell wall, only plasma membrane:
animal cell
no chlorophyll or chloroplasts:
animal cell
no large vacuole, only small ones:
plasma membrane
selective membrane:
chromosome
the double strand is twisted and coiled
the double strand is twisted and coiled
How is all the information contained in the DNA molecule able to fit in the nucleus?
cell cement
The intercellular material that holds plant cells together
endoplasmic reticulum
channels for transporting molecules within the cell
plant cell
chloroplasts and plastids:
animal cell
cleavage furrow plus centrioles in cell division:
True
A gene is a subunit of information within a chromosome.
chloroplast
A packet of chlorophyll arranged in stacks within a plant cell
False
A plant cell does not have a plasma membrane like animal cells.
False
A plant cell will become soggy and limp when it is filled with water.
cell plate
A septum which forms to separate the two new plant cells
endoplasmic reticulum
An interconnected series of tubes in the cytoplasm is called the _____.
False
Cell division of both plants and animals is an identical process.
chlorophyll
Chloroplasts contain , necessary for photosynthesis by green plants.
nucleus
DNA is located within the:
You can demonstrate the importance of water to a plant's rigidity by depriving a plant of water. The stem and leaves will wilt because the vacuoles are not filled. When you water the plant, it will become rigid once again provided it has not died from extended water loss.
Describe why plant cells are rigid:
gene
Each physical trait of an organism is produced by the instruction of a particular _____.
the type and sequence of molecules along each strand
In what form is coded information found in DNA?
Golgi bodies
Involved in producing and packaging secretions
r-RNA
Makes up the structure of the ribosomes
cellulose
Material which makes up the structure of the cell wall
secretion
Substances produced by the Golgi bodies
nucleoli
Ribosomal RNA is produced by:
False
Ribosomal RNA is produced in the cytoplasm.
False
Science has shown how information can only be gathered by the known laws of physics and chemisty.
chlorophyll
Serves to trap the sun's energy for photosynthesis
ribosomes
The _____ are responsible for linking amino acids together.
mother cell
The cell that is about to undergo binary fission
True
The cell wall of a plant is like a laminated two layer structure.
False
The cell wall of a plant is made from phospholipids and cellulose.
spindle
The fibers which direct the even distribution of chromosomes
daughter cell
The new cells resulting from the division of the mother cell
cleavage furrow
The pinching in of the animal cell during cell division
inner randomly
The primary cell wall is the layer made of arranged cellulose fibers.
meiosis
The process involving the division of the nucleus in a reproductive cell
mitosis
The process involving the division of the nucleus of a body cell
gametes
The reproductive cells in sexual reproduction
plant cell
cell plate and no centrioles in cell division:
cell wall
cellulose:
cell wall
gives strength to cell:
plant cell
large hypertonic vacuole:
plasma membrane
phospholipid and protein:
centrioles
play a role in the formation of the spindle during cell division
plant cell
presence of cell wall:
Golgi bodies
produce and package cell secretions
centrioles
produce r-RNA to make ribosomes
endoplasmic reticulum
produce the spindle fibers for cell division
nucleus
round structure within the cell
ribosomes
tiny structures which synthesize proteins