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Examen

PCB3134 Final Exam (Chapters 1, 3, 4, 6, 7, 8, 9, 10, 12 ) – Questions With Correct Solutions

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PCB3134 Final Exam (Chapters 1, 3, 4, 6, 7, 8, 9, 10, 12 ) – Questions With Correct Solutions

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PCB 3134
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PCB 3134
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Subido en
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2025/2026
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Examen
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PCB3134 Final Exam (Chapters 1, 3, 4, 6, 7, 8, 9, 10, 12 ) –
Questions With Correct Solutions

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Practice questions for this set


Learn 1/6 Study with Learn




3 Na+ out per 2 K+ in
-uses 1 ATP



Choose an answer



1 Light microscopy (brightfield) 2 Enzymes



3 Cytology 4 Na+/K+ ATPase



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Terms in this set (158)


Most common; white light transmitted through specimens. Often
Light microscopy (brightfield)
requires stains.

an electron microscope in which a beam of electrons is
Transmission electron
transmitted through a specimen and focused to produce an
microscopy (TEM)
image.

Scanning electron microscopy Electrons scan the specimen surface, which reveals external
(SEM) features in 3D

Freeze fracture microscopy cells are frozen and a knife is used to crack them open

focuses mainly on cellular structure and emphasizes optical
Cytology
techniques

Biochemistry focuses on cellular structure and function

focuses on information flow and heredity and includes
Genetics
sequencing of the entire genome in numerous organisms

uses centrifugation to separate/isolate different structures and
Subcellular fractionation
macromolecules

, are capable of very high speeds (over 100,000 revolutions per
Ultracentrifuges
minute)

techniques to separate molecules from a solution based on size,
Chromatography
charge, or chemical affinity

uses an electrical field to move proteins, DNA or RNA molecules
Electrophoresis
through a medium based on size/charge

is used to determine the size and composition of individual
Mass Spectrometry
proteins

Enzymes serve as catalysts, increasing the rates of chemical reactions

structural proteins physical support and shape

motility proteins contraction and movement

regulatory proteins control and coordinate cell function

transport proteins move substances into and out of cells

signaling proteins communication between cells

receptor proteins enable cells to respond to chemical stimuli from the environment

defensive proteins protection against disease

storage proteins storage of amino acids

Amino acids are linked together dehydration
stepwise into a linear polymer
by _________ reactions

N- (amino) terminus the end of a polypeptide chain that carries a free a-amino group

The end of a polypeptide chain that carries a free carboxyl
C- (carboxyl) terminus
group (-COOH).

Covalent disulfide bonds form sulfur, cysteine
between the _____ atoms of two
_________ residues

Disulfide bons form through oxidation, reduction
_________ and can be broken
through __________

form in water and between amino acids in a polypeptide chain
hydrogen bonds
via their R groups

ionic bonds form between positively and negatively charged R groups

Weak attractions between molecules or parts of molecules that
Van Der Waals interactions
result from transient local partial charges.

a type of weak chemical interaction caused when molecules that
Hydrophobic interactions
do not mix with water coalesce to exclude water

Primary structure Sequence of amino acids in a protein.

describes local regions of structure that result from hydrogen
Secondary structure bonding between N H and C O groups along the polypeptide
backbone (alpha helix and beta sheets)

B sheet characterized by a maximum of hydrogen bonding

the overall, three-dimensional shape of a polypeptide due to
tertiary structure interactions of the R groups of the amino acids making up the
chain.

The particular shape of a complex, aggregate protein, defined
quaternary structure by the characteristic three-dimensional arrangement of its
constituent subunits, each a polypeptide.

units of secondary structure consist of short stretches of alpha
Motifs
helices and beta sheets

Native conformation the most stable possible 3D structure of a particular polypeptide
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