Who used a compound microscope to see chambers within cork and named them cells?
Anton can Leeuwehhoek
Robert Hooke
Matthias Schleiden
Rudolf Virchow
The work of Schleiden and Schwann can be summarized by saying that
all plants are made of cells
all animals are made of cells
plants and animals have specialized
all plants and animals are made of cells
Which of the following is NOT a principle of cell theory?
cells are the basic unit of life
all living things are made of cells
very few cells are able to reproduce
all cells are produced from existing cells
The cell theory does NOT apply to
bacteria
plants and animals
mutlicellular organisms
rocks and soil
Electron microscopes can reveal details
only in specimens that are still alive
about the different colors of cell structures
of cell structures only once they are stained
1000 times smaller than those visible in light microscopes
Which type of microscope can produce three-dimensional images of a cell's surface
transmission electron microschope
scanning electron microscope
simple light microscope
compound light microscope
Colors seen in images made from elecron microscopes are
true to life
the colors of electrons
added to make certain structures easier to see
added so scientists can trace living cells through the body
Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?
The cell lacks a cytoplasm
the cell lacks a cell membrane
the cell lacks a nucleus
the cell lacks genetic material
which of the following enclose their DNA in a nucleus?
prokaryotes
viruses
eukaryotes
prokaryotes usually have
a nucleus
specialized organelles
genetic material
many cells
which of the following organisms are prokaryotes?
plants
animals
fungi
Which of the following is the function of the nucleus?
stores DNA
stores sugars
builds proteins
packages proteins
Which of the following is NOT found in the nucleus?
mitochondria
nucleolus
chromatin
DNA
Which organelle breaks down organelles that are no longer useful?
Golgi apparatus
lysosome
endoplasmic reticulum
mitochondrion
Which of the following is a function of the cytoskeleton?
helps a cell keep its shape
contains DNA
surrounds the cell
helps make proteins
Which structure makes proteins using coded instructions that come from the nucleus?
Golgi Apparatus
mitochondion
vacuole
ribsome
Which sequence correctly traces the path of a protein in the cel?l
ribosome, endoplasmic reticulum, gogli apparatus
ribosome, endoplasmic reticulum, chloroplast
ribosome, gogli apparatus, endoplasmic reticulum,
endoplasmic reticulum, lysosome, golgi apparatus
which organelle would you expect to find in a plant cell but not in an animal cell?
cholorplast
smooth endoplasmic reticulum
ribsosome
the primary function of the cell wall is to
support and protect the cell
store DNA
direct the activities of the cell
help the cell move
you will not find a cell wall in which types of organisms?
plant
animal
which of the following structures serves as the cell's boundary from its environment?
cell membrane
channel protein
chloroplast
The cell membrane contains channels and pumps that help move materials from one side to another. What are these pumps made of?
carbohydrates
lipids
bilipds
proteins
The diffusion of water across a selectively permeable membrane is called
active transport
passive transport
osmosis
osmotic pressure
which term descibes the relatively constant internal physical condition of an organism?
homeostasis
cell stabilization
unicellularity
organ system
which of the following is an example of an organ?
heart
nerve cell
epithelial tissue
digestive system
a group of similar cells that perform the same function are called
tissue
organ
division of labor
An organ system is a group of organs
made up of similar cells
made up of similar tissues
work together to perform all the functions in a multicellular organism
work together to perform a similar function
Which list represents the simplest to most complex levels of organization in a multicellular organism?
cell, tissue, organ system, organ
cell, tissue, organ, organ system
organ, organ system, tissue, cell
tissue, organ, organ system, cell
organisms, such as plants, that make their own food are called
herterotrophs
autotrophs
thylakoids
pigments
organisms that cannot make their own food and must obtain from external sources are called
heterotrophs
which of the following organisms makes its own food from light energy from the sun?
mushroom
amoeba
leopard
oak
which of the following is a heterotroph?
sunflower
wheat
algae
plants gather the sun's energy with light absorbing molecules called
chloroplasts
glucose
plants gets the energy they need for photosynthesis by absorbing
high energy sugars
chlorophyll a
chlorophyll b
sunglight
most plants appear green because chlorophyll
absorbs green light
absorbs violet light
does not absorb green light
does not absorb violet light
a granum is a
stack of chloroplasts
stack of thylakoids
membrane enclosing the thylakoids
photosynthetic pigment molecule
the stroma is the region outside of the
plant cells
all of the above
photosynthesis uses sunlight to convert water and carbon dioxide into
oxygen and carbon
high energy sugars and proteins
ATP and oxygen
oxygen and high energy sugars
in the overall equation of photosynthesis, 6 molecules of carbon dioxide and 6 molecules of water result in one molecule of sugar and six molecules of
water
oxygen
atp