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Cell Bio > exam 3 TYK > Flashcards

exam 3 TYK Flashcards

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Biology 101 flashcards
1
Q

alpha tubule protein

A

nexin

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2
Q

side arms

A

generate force to slide microtubules past one another

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3
Q

function of cytoplasmic dynein

A

movement along microtubule toward its minus end

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4
Q

function of axonemal dynein

A

generates force for sliding of flagellar microtubules

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5
Q

function of tropomodulin

A

prevents loss of subunits from filament minus end

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6
Q

function of microvilli

A

increase cell surface area

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7
Q

cause of crassulacean acid metabolism (CAM)

A

severe water restriction

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8
Q

function of nebulin

A

stabilizes thin filaments

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9
Q

salvage pathway

A

glycolate pathway

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10
Q

where are axonemal tubules located?

A

cilia and flagella

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11
Q

role of actin binding proteins

A

polymerization process, elongation of F-actin, stability and organization of the filaments

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12
Q

role of Rho GTPase

A

involved in the formation of actin structure in cells

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13
Q

T or F: Continuous carbon assimilation in the Calvin cycle is made possible by the regeneration of ribulose-1,5-bisphosphate

A

true

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14
Q

T or F: When a photon is absorbed by a pigment (light-absorbing molecule), such as chlorophyll, the energy of the photon is transferred to an electron to move it from a low to a high energy orbital

A

true

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15
Q

dual enzymatic functions of rubisco

A

oxygenase and carboxylase

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16
Q

T or F: Protein glycosylation in the ER starts with the dolichol phosphate

A

true

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17
Q

T or F: Calnexin and calreticulin helps in the proper folding of glycoproteins synthesize in ER

A

true

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18
Q

T or F: COPI target vesicles to the Golgi apparatus or ER

A

true

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19
Q

The vesicles of receptor mediated endocytosis are covered with a lattice of __________

A

clathrin

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20
Q

T or F: Plastocyanin is a mobile electron transport giving its electron to ferrodoxin NADP reductase

A

false

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21
Q

Starch synthesis occurs in the chloroplast _______

A

stroma

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22
Q

T or F: Rac is involved in the polymerization of microtubules

A

false, actin filament polymerization

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23
Q

Nuclear lamins are a member of the _____

A

IFs

24
Q

T or F: Colchicine affects microtubules assembly

A

true

25
Q

T or F: Actin bundles give shape and support flagella

A

false

26
Q

T or F: Cytochalasin D affects microfilaments

A

true

27
Q

Disulfide bonds are often found to stabilize _________ protein structure

A

tertiary

28
Q

Which characteristics of a free-living bacteria have mitochondria lost over time?

A

motility

29
Q

T or F: actin filaments may form axonemes containing doublet microfilament

A

false

30
Q

site of photosynthesis in cyanobacteria

A

photosynthetic membranes

31
Q

function of nexin in the axoneme

A

links adjacent outer doublets to limit sliding

32
Q

function of capZ

A

prevents assembly and disassembly at microfilament plus ends

33
Q

enzyme not involved in the regulation of the citric acid cycle

A

succinate dehydrogenase (no NADH production)

34
Q

Pyruvate dehydrogenase is NOT regulated by ______

A

ATP

35
Q

In a lysosomal storage disease, newly synthesized lysosome hydrolases are secreted from the cells rather than being delivered to the lysosomes. What is one possible mechanism for this result?

A

mannose is not phosphorylated in the cis-golgi network

36
Q

Comparing cells synthesizing secretory proteins and cells secreting steroid hormones, the cells synthesizing the steroid hormones have more ________ ER

A

smooth

37
Q

_____ plants make use of the hatch-slack cycle

A

C4

38
Q

the calvin cycle occurs in the chloroplast _________

A

stroma

39
Q

The transfer of energy directly from a photoexcited electron in a pigment molecule to another electron in an adjacent pigment molecule occurs by ______________________________

A

resonance energy transfer

40
Q

two main types of microtubules

A

cytoplasmic and axonemal

41
Q

tissue specific

A

intermediate filaments

42
Q

function of cytochalasins

A

prevent addition of monomers to preexisting microfilaments

43
Q

chemotaxis

A

directional movement in response to a graded chemical stimulus

44
Q

The ________ protein complex facilitates the interaction between cytoplasmic dynein, a cargo vesicle, and a microtubule

A

dynactin

45
Q

T or F: A microtubule-organizing center (MTOC) anchors only the minus ends of cytoplasmic microtubules

A

true

46
Q

A protein that is N-glycosylated is expected to be __________________

A

secreted from the cell

47
Q

Biosynthesis of sucrose occurs in the __________

A

cytosol

48
Q

T or F: COPII vesicles final destination is the golgi apparatus

A

true

49
Q

T or F: SNARE proteins are retention proteins in Golgi apparatus

A

false

50
Q

T or F: microtubules are made of two monomeres

A

true

51
Q

T or F: Actin bundles give shape and support to cilia found in intestinal mucosal cells

A

false

52
Q

In which organelle would you expect to first find a protein destined to be secreted from a cell?

A

ER

53
Q

T or F: lamellipodia contain bundles of microtubules that push the plasma membrane forward

A

false

54
Q

Which protein would be a good drug target for interfering with microfilament network breakdown?

A

gelsolin

55
Q

T or F: FADH2 transfers its electron to complex II

A

true

56
Q

substrates of citric acid cycle

A

oxaloacetate
citrate
isocitrate
a ketoglutarate
succinyl coa
succinate
fumarate
malate

57
Q

T or F: β-oxidation lengthens fatty acids by addition of two carbons

A

false

Cell Bio (14 decks)

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