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WorksheetsCell: Parts
Total questions: 58
Worksheet time: 34mins
A ______ is the smallest unit of life.
cell
atom
tissue
organ
Which of the following best describes the function of a cell?
It is only a structural unit
It carries out metabolic activities essential for life, as well as specialized functions, and adapts to changing conditions
It does not adapt to changing conditions
It only forms tissues
Cells interact to form ______, organs, and organ systems.
tissues
molecules
cells
atoms
The human body consists of 30 trillion cells that vary considerably in shape and size, yet have much in common.
True
False
Differences in cell ______ and arrangement make different functions possible.
shape
color
temperature
weight
Which of the following is an example of a cell's specialized function?
Nerve cells have long extensions that conduct electrical impulses
Epithelial cells in the mouth are flat, thin, and densely packed to provide a protective barrier
Both A and B
None of the above
______ control a cell’s actions and responses.
Genes
Mitochondria
Ribosomes
Enzymes
What is a composite cell?
A cell that includes many different cell structures, but no cell contains all of them.
A cell that only contains a single type of organelle.
A cell that is found only in plants.
A cell that cannot divide or reproduce.
Within the cytoplasm are specialized organelles that perform specific functions for the cell. What are these specialized structures called?
Organelles
Chromosomes
Enzymes
Ribosomes
Organelles are suspended in a fluid called the ________.
cytosol
nucleus
mitochondria
ribosome
What is another name for the cell membrane?
Plasma membrane
Nucleus
Cell wall
Mitochondria
Which of the following is a function of the cell membrane?
Produces energy
Regulates the movement of substances in and out of the cell
Stores genetic information
Synthesizes proteins
Which of the following is NOT a general characteristic of the cell membrane?
Extremely thin, flexible, and elastic
Selectively permeable
Rigid and inflexible
Has complex surface features
What does it mean when the cell membrane is described as 'selectively permeable'?
It regulates the entry and exit of substances.
It allows all substances to pass freely.
It blocks all substances from entering or leaving.
It only allows water to pass through.
Cell membranes are composed mainly of _______ and proteins, and some carbohydrates.
lipids
nucleic acids
minerals
vitamins
What are ribosomes composed of?
DNA and protein
RNA and protein
Lipids and carbohydrates
RNA and lipids
Ribosomes provide structural support and enzyme activity for ________ synthesis.
protein
lipid
carbohydrate
nucleic acid
Where can ribosomes be found?
Only in the nucleus
In the cytoplasm or bound to rough endoplasmic reticulum
Only in mitochondria
In the cell wall
What is the endoplasmic reticulum (ER) made up of?
Membrane-bound flattened sacs and vesicles
Circular DNA
Mitochondria
Lysosomes
What is the main function of the endoplasmic reticulum (ER) in the cell?
Energy production
Transport network throughout the cell
Cell division
Waste removal
How many types of endoplasmic reticulum are there?
2
3
4
1
Which type of endoplasmic reticulum contains ribosomes and functions in protein synthesis?
Smooth ER
Rough ER
Which type of endoplasmic reticulum does not contain ribosomes and functions in lipid synthesis, absorption of fats, and metabolism of drugs?
Rough ER
Smooth ER
What are vesicles?
Membranous sacs
Protein fibers
Nucleus
Ribosomes
Luna is learning about cells in her biology class. She discovers that vesicles store or transport substances within or between cells. Is this statement true?
Yes
No
The Golgi apparatus is composed of ________, membranous sacs.
flattened
circular
elongated
cuboidal
What is the main function of the Golgi apparatus?
Produces energy
Refines, packages, and transports proteins formed in the rough ER
Synthesizes DNA
Stores genetic information
A new vesicle pinches off the Golgi apparatus and may then move to the cell membrane to secrete its contents to the outside. This process is called ________.
exocytosis
endocytosis
phagocytosis
osmosis
Mitochondria are ______ fluid-filled sacs.
elongated
round
square
flat
What is the inner membrane of a mitochondrion folded into, which increases surface area?
cristae
thylakoids
grana
stroma
Mitochondria house many chemical reactions that extract energy from nutrients (cellular respiration) and produce what molecule?
ATP
DNA
Glucose
Chlorophyll
Where do mitochondria store the energy they produce?
in the chemical bonds of ATP
in the nucleus
in the cell membrane
in the cytoplasm
Very active cells contain thousands of mitochondria.
True
False
Mitochondria have their own DNA and reproduce by dividing.
True
False
Lysosomes are formed by budding off which organelle?
Mitochondria
Golgi apparatus
Endoplasmic reticulum
Nucleus
Which of the following is NOT a function of lysosomes?
Breaking down nutrients
Detoxification of alcohol
Breaking down toxins
Breaking down worn out cell parts
What is a centrosome? A nonmembranous structure, made up of two hollow cylinders called ________, that function in the distribution of chromosomes during cell division; made of nine groups of three microtubules.
centrioles
ribosomes
lysosomes
mitochondria
What is the function of cilia?
move fluids or whole cells
produce hormones
store genetic information
synthesize proteins
Which is the only human cell with a flagellum?
Red blood cell
Sperm cell
Muscle cell
Nerve cell
The ______ contains genetic material, DNA, which controls cell activities.
nucleus
mitochondria
cell membrane
cytoplasm
What is condensed DNA in the nucleus referred to as?
A) Chromatin
B) Nucleolus
C) Chromosomes
D) Nucleoplasm
The nucleolus is the site of ribosome production.
True
False
Which cell part synthesizes proteins?
Ribosomes
Mitochondria
Nucleus
Lysosomes
Which cell part contains and transports various substances?
Vesicles
Nucleus
Mitochondria
Ribosomes
What is the function of the Golgi apparatus?
Packages protein molecules for transport and secretion
Produces energy for the cell
Controls cell division
Synthesizes DNA
Which cell part releases energy from nutrient molecules and changes energy into a usable form?
Mitochondria
Nucleus
Ribosome
Chloroplast
What is the function of lysosomes?
House enzymes that digest worn cellular parts or substances that enter cells
Produce energy through cellular respiration
Synthesize proteins for the cell
Store genetic information
What is the function of Microfilaments and microtubules?
Support the cytoplasm and help move substances and organelles within the cytoplasm
Produce energy for the cell through cellular respiration
Store genetic information and control cell activities
Synthesize proteins for export out of the cell
What is the function of the Centrosome?
Helps distribute chromosomes to new cells during cell division
Produces energy for the cell
Synthesizes proteins
Stores genetic information
What is the structure of the Centrosome?
Nonmembranous structure composed of two rodlike centrioles
Membranous structure containing ribosomes
Double-membraned organelle with its own DNA
Network of protein filaments and tubules
What is the function of Cilia and flagella?
Cilia propel fluid over cellular surfaces, and a flagellum enables a sperm cell to move
Cilia and flagella are responsible for protein synthesis in the cell
Cilia and flagella store genetic information
Cilia and flagella are involved in photosynthesis
What is the structure of Cilia and flagella?
Motile projections attached beneath the cell membrane
Non-motile organelles found in the nucleus
Large vacuoles filled with fluid
Rigid structures made of cellulose
What is the structure of the Nuclear envelope?
Double membrane that separates the nuclear contents from the cytoplasm
Single membrane that surrounds the entire cell
Triple membrane that encloses the mitochondria
Network of protein filaments within the cytoplasm
Chose the structure that is responsible for the processing of lipids and carbohydrates.
Identify the structure used to move material outside of the cell.
