Transcript 7th Grade Cells Review

7th Grade Cells Review
Explain one exception to the cell
theory.
Viruses – are not made up of cells
Living things contain units of structure
and function that arise from
preexisting units. This statement best
describes the
1.cell theory.
2. lock-and-key model of enzymes.
3. concept of natural selection.
4. heterotroph hypothesis.
Which statement is not a part of the
cell theory?
(1) Cells are the basic unit of
structure of living things.
(2) Cells are the basic unit of
function of living things.
(3) Cell parts such as chloroplasts
are self-replicating.
(4) Cells come from preexisting cells.
Which statement explains why
viruses are exceptions to the cell
theory?
1.
2.
3.
4.
They contain genetic material.
They are not made up of cells.
They reproduce by mitosis.
They are surrounded by a protein
coat.
Give the cell organelle that performs each
function.
1. Transport materials throughout the cell
endoplasmic reticulum
2. Protein production ribosomes
3. Digests food lysosomes
4. Regulates what enters and leaves the cell
cell membrane
5. Produces energy mitochondria
6. Controls all cell activities nucleus
7. Holds cell organelles cytoplasm
8. Site of photosynthesis chloroplasts
9. Used in cell division centrioles
10. Gives plant cell shape and support cell wall
11. Stores materials vacuoles
Identify all the organelles labeled and give the
function of each.
Nucleus: controls all cell
activities
Vacuole:
stores
materials
Ribosome:
produces proteins
Mitochondria: produces
energy
Cell membrane: controls
what enters and leaves
the cell
1. What type of cell is represented? Animal cell
2.What is structure B? What is the function of this
structure? Nucleus – controls all cell activities
3.What is the function of structure C? Stores
materials
4.Explain how structure A maintains homeostasis
within the cell? It controls what enters and exits the
cell.
Identify the structures labeled and the function of
each.
1- nucleus: controls all cell activities
2 – nucleolus: produces ribosomes
3 – cell membrane: controls what
enters and exits the cell
4 – cytoplasm: holds cell organelles
5 – cell wall: keeps plant cells rigid
and supports plant cell
6 – vacuole: stores materials
7 - chloroplast: site of
photosynthesis
One difference between plant
and animal cells is that animal
cells do not have
(1)a nucleus
(2)chloroplasts
(3)a cell membrane
(4)centrioles
Which structure permits the entry
and exit of materials in an animal
cell?
(1.) lysosome
(2.) chromosome
(3.) cell wall
(4.) cell membrane
The structure most closely
associated with the destruction of
worn out cell organelles is the
(1.) lysosome
(2.) centrosome
(3.) vacuole
(4.) chromosome
Which is found in the nucleus?
(1.) ribosome
(2.) vacuole
(3.) lysosome
(4.) chromosome
The rigidity (support) of a
plant cell is due primarily
to the presence of the
(1) chloroplasts
(2) centrosomes
(3) cell membrane
(4) cell wall
Whitney observes a cell under the
microscope. She identifies it as a
green plant cell and not a cheek
cell because of a
(1.) nucleus
(2.) cell membrane
(3.) chloroplast
(4.) mitochondrion
While viewing a slide of rapidly
moving sperm cells, a student
concludes that these cells require
a large amount of energy to
maintain their activity. The
organelles that most directly
provide this energy are known as
(1) vacuoles
(2) chloroplasts
(3) ribosomes (4) mitochondria
Which structure is found ONLY in
animal cells?
(1.) cell wall
(2.) vacuoles
(3.) centrioles
(4.) chloroplasts
The organelle most closely
associated with the manufacture
of proteins within the cell is the
(1.) ribosome
(2.) nucleolus
(3.) cell wall
(4.) cell membrane
1.What is this structure called? chloroplast
2.In what kind of cell is this structure
found? Plant cell
3. What process occurs in this structure?
Photosynthesis
1.What is this structure called? mitochondria
2.What is the function of this organelle?
Produces energy (ATP)
3.In what kind of cells would you find this
organelle? Both animal and plant celld
Which sequence of terms is in the
correct order from simplest to
most complex?
(1) cells, tissues, organs, organ
systems
(2) tissues, organisms, cells,
organ systems
(3) cells, tissues, organ systems,
organs
(4) organs, organisms, organ
systems, cells
Explain two differences between
prokaryotic and eukaryotic cells.
Prokaryotic cells do not contain a nucleus while eukaryotic
cells do.
Prokaryotic cells do not contain cell organelles while
eukaryotic cells do.
DNA in prokaryotic cells is found in the cytoplasm while
the DNA in eukaryotic cells is found in the nucleus.
Prokaryotic cells are smaller than eukaryotic cells do.
1. Give an example of a prokaryotic
cell. bacteria
2. Give an example of a eukaryotic cell.
Paramecia, ameba, algae, animal and plant cells
The breakdown of organic
compounds to produce ATP is
known as
(1)cellular respiration
(2)transpiration
(3)active transport
(4) photosynthesis
An important molecule generated by
both lactic acid fermentation and
alcoholic fermentation is
(1) ATP
(2) CO2
(3) CO2
(4) H2O
C6H12O6 + 6O2
 6CO2 + 6 H2O + X
1. What is the name of the process
represented above? Aerobic respiration
2. Where does this process occur?
mitochondria
3. What molecule does X represent?
Energy
or
ATP
Aerobic respiration and fermentation
are similar in that both processes
(1.) require oxygen
(2.) utilize light energy
(3.) release energy
(4.) produce carbohydrates
When muscles are exercised
extensively in the absence of
sufficient oxygen,
(1) lactic acid is produced
(2) a large amount of ATP is formed
(3) NADH molecules split
(4) oxidative respiration occurs
Yeast produce alcohol and CO2 in the
process of
(1)lactic acid fermentation
(2)alcoholic fermentation
(3)aerobic respiration
(4) glycolysis
In the presence of oxygen, _____
molecules of ATP can be formed.
(1)2
(2) 19
(3) 36
(4) 63
An end product of alcoholic
fermentation is
(1)glucose
(2) oxygen
(3) carbon dioxide
(4) lactic acid
The life function of transport in an
organism directly involves those
activities used to:
1.absorb and distribute materials
2.obtain and break down materials
3.release energy from food
4.produce cellular waste products
1. What type of transport does this picture
represent? Active transport
2. Explain your answer.
Substances are moving from a LOW to HIGH
concentration.
The diagram above shows the same type
of molecule in area A and area B. With
the passage of time, some molecules
move from area A to area B. This
movement is the result of the process
passive transport
of __________.
The movement of materials from
higher to lower concentration is
called
(1.) diffusion
(2.) active transport
(3.) pinocytosis
(4.) phagocytosis
The movement of materials from
lower to higher concentration
requiring energy is called
(1.) movement
(2.) diffusion
(3.) active transport
(4.) cell division
Diffusion is a term for the movement of
molecules from
(1) an area of low concentration
to a high concentration
(2) an adjacent area to a gradient
area
(3) an area of high concentration
to a low concentration
(4) a nucleus to the mitochondria