Deck 6: Cell Structure

Question 1

Which are NO T one of the ways that cells connect to each other?

A) Gap junction
B) Adherens junction
C) Desmosome
D) Zonula occludens
E) Connectosome

Answer 1

E

Question 2

Of the following, the organelle most involved in the synthesis of lipids is the

A) Rough endoplasmic reticulum
B) Smooth endoplasmic reticulum
C) Golgi apparatus
D) Peroxisome
E) E ndosome

Answer 2

B

Question 3

Kinesin and dynein move vesicles and other cargo along tracts composed of

A) M yos in
B) D es m in
C) Ac tin
D) Tu bu lin
E) Interm edia te filam ents

Answer 3

D

Question 4

Doub le mem branes a re part of the structure of

A) The endoplasmic reticulum
B) The m itoc ho nd ria
C) The peroxisome
D) The Golgi apparaturs
E) The cytoskeleton

Question 5

The boundary between the inside and outside of a cell is provided by the

A) Cell membrane
B) Endoplasmic reticulum mem brane
C) Mitochondrial membrane
D) Nuclear Envelope
E) Cytoskeleton

Question 6

Gap junctions are formed by

A) Integrins
B) Cadherins
C) D es m op lak in
D) Co nn exin
E) Pla ko ph ilin

Question 7

The concentration of solutes in the cytoplasm of most cells follows which of the following order, from grea test to least:

A) Na>K>ATP>Ca
B) K>Na>ATP>Ca
C) Na>K>Ca>ATP
D) Na>ATP>K>Ca
E) ATP>Na>K>Ca

Question 8

Which o f th e fo llow ing su pp or ts th e e nd os ym bio tic h ypo the sis

A) Mitochondria contain circular DNA separate from nuclear DNA
B) Mitochondria consume oxygen
C) Lysosomes contain hydrolytic enzymes
D) Mitochondria import proteins from the cytoplasm
E) Ribosomes contain RNA

Question 9

Cells adhere to each other through all of the following junctions EXCEPT

A) Desm osomes
B) Gap junctions
C) Zonula adherens
D) Zonula occludens
E) Zo nu la cad hera

Question 10

The Svedberg is defined as

A) kT /D
B) 6wy
C) m 2r / g
D) (dr/d t) / m 2r
E) -þ v

Question 11

The relative centrifugal force is given as

A) kT /D
B) 6wy
C) m 2r / g
D) (dr/d t) / m 2r
E) -þ v

Question 12

Most of the oxygen consumption of human cells occurs in the

A) Cytosol
B) Peroxisomes
C) Lysosomes
D) Nucleus
E) M itoc ho nd ria

Question 13

Purified subcellular organelles are most often isolated by

A) Electron microscopy
B) Differential centrifugation
C) Fr ee zon e e lec tro ph or es is
D) Light microscopy
E) Bouyant density centrifugation

Question 14

Of the following, the organelle most involved with packaging and pro ce ss ing of s ec re ted pro tein s is the

A) Endoplasmic reticulum
B) Peroxisome
C) Golgi apparatus
D) Nucleus
E) M itoc ho nd ria

Question 15

Proteasomes degrade proteins that are "tagged" by

A) Myristoylation
B) Palmitoylation
C) Formation of disulfide bonds
D) Farnesylation
E) Ubiquitinylation

Question 16

Intermediate filaments differ from the other cytoskeletal filaments in that

A) Intermediate filaments have a polarity (+ and - ends)
B) Intermediate filaments are dynamic along their entire length, not just the ends
C) They are approximately 100 nm in diameter
D) Intermediate filaments are polymers of globular monom eric proteins
E) Interm edia te filam ents do n ot diffe r from the o ther c ytosk eletal e lem ents exc ept in s ize

Question 17

The endosymbiotic hypothesis proposes that

A) Lysosomes fuse with endocytotic vesicles to form secondary lysosomes
B) Phagocytosis was a precursor to the gastrointestinal system
C) Secon dary active transpo rt is neces sary for life
D) M itoc ho nd ria or igin ated from eng ulfm en t of a ero bic b acte ria
E) T he nu cle us wa s o nc e a se pa ra te c ell

Question 18

All of the following organelles of the cell have mem branes that enclose a space except

A) M itoc ho nd ria
B) Peroxisomes
C) Cytoskeleton
D) Lysosomes
E) Nucleus