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Biology
Quizzes Test 1
27
Biology
Not Applicable
02/15/2004

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Term
Proton
Definition
Positively charged; located in the atomic nucleus
Term
Neutron
Definition
Uncharged; located in the atomic nucleus
Term
Electron
Definition
Negatively charged; smallest of the 3 atomic particles
Term
Atom
Definition
The smallest particle of an element which retains the properties of that element.
Term
False
Definition
True or False:
Electrons are located at fixed, stationary points at defined distances from the atomic nucleus.
Term
True
Definition
True or False:
Each orbital can hold 1 or 2 electrons (2 maximum).
Term
Endoplasmic reticulum
Definition
Site of initial protein modifications.
Term
Ribosome
Definition
"Protein factories"
Term
Golgi body
Definition
Site of final protein modifications.
Term
Vesicle
Definition
Small lipid bilayer sac for transporting proteins.
Term
Microbody
Definition
Lysosomes, peroxisomes, and glyoxysomes.
Term
Mitochondria
Definition
Site of aerobic respiration.
Term
Chloroplast
Definition
Site of photosynthesis.
Term
Central vacuole
Definition
Large storage sac in plant cells.
Term
Cytoskeleton
Definition
Provides structural support for the cell.
Term
Lumen
Definition
The inside of any tubular organ or organelle.
Term
D All of the above
Definition
Plasma membranes incorporate which of the following?
A transport proteins
B adhesion proteins
C recognition proteins
D all of the above
Term
D All of the above
Definition
Vesicle formation occurs in which of the following?
A membrane cycling
B phagocytosis
C endocytosis and exocytosis
D all of the above
Term
True
Definition
True of False
Active transport against a concentration gradient requires an input of energy.
Term
False
Definition
Desmosomes (adhering junctions) hold cells together and form a water-tight seal.
Term
B Centromere
Definition
During mitosis, the structure which holds the two sister chromatids together and attaches them to the spindle microtubles is the
A centriole
B centromere
C spindle equator
D nucleolus
Term
A Interphase
Definition
Which of the following is NOT a stage of mitosis?
A interphase
B prophase
C metaphase
D ananphase
Term
B Prophase
Definition
During which stage of mitosis does the nuclear envelope begin to break down?
A interphase
B prophase
C metaphase
D ananphase
Term
C Metaphase
Definition
During which stage of mitosis are the sister chromatids aligned along the spindle equator?
A interphase
B prophase
C metaphase
D ananphase
Term
D Anaphase
Definition
During which stage of mitosis do the sister chromatids begin to move apart?
A interphase
B prophase
C metaphase
D ananphase
Term
Telephase
Definition
During which stage of mitosis do the sister chromatids move further apart and two nuclei begin to reform?
Term
Proteins
Definition
Most cell membrane functions are carried out by ______________.
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