exam 3 TYK

Question 1

alpha tubule protein

Answer 1

nexin

Question 2

side arms

Answer 2

generate force to slide microtubules past one another

Question 3

function of cytoplasmic dynein

Answer 3

movement along microtubule toward its minus end

Question 4

function of axonemal dynein

Answer 4

generates force for sliding of flagellar microtubules

Question 5

function of tropomodulin

Answer 5

prevents loss of subunits from filament minus end

Question 6

function of microvilli

Answer 6

increase cell surface area

Question 7

cause of crassulacean acid metabolism (CAM)

Answer 7

severe water restriction

Question 8

function of nebulin

Answer 8

stabilizes thin filaments

Question 9

salvage pathway

Answer 9

glycolate pathway

Question 10

where are axonemal tubules located?

Answer 10

cilia and flagella

Question 11

role of actin binding proteins

Answer 11

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

Question 12

role of Rho GTPase

Answer 12

involved in the formation of actin structure in cells

Question 13

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

Answer 13

true

Question 14

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

Answer 14

true

Question 15

dual enzymatic functions of rubisco

Answer 15

oxygenase and carboxylase

Question 16

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

Answer 16

true

Question 17

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

Answer 17

true

Question 18

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

Answer 18

true

Question 19

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

Answer 19

clathrin

Question 20

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

Answer 20

false

Question 21

Starch synthesis occurs in the chloroplast _______

Answer 21

stroma

Question 22

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

Answer 22

false, actin filament polymerization

Question 23

Nuclear lamins are a member of the _____

Answer 23

IFs

Question 24

T or F: Colchicine affects microtubules assembly

Answer 24

true

Question 25

T or F: Actin bundles give shape and support flagella

Answer 25

false

Question 26

T or F: Cytochalasin D affects microfilaments

Answer 26

true

Question 27

Disulfide bonds are often found to stabilize _________ protein structure

Answer 27

tertiary

Question 28

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

Answer 28

motility

Question 29

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

Answer 29

false

Question 30

site of photosynthesis in cyanobacteria

Answer 30

photosynthetic membranes

Question 31

function of nexin in the axoneme

Answer 31

links adjacent outer doublets to limit sliding

Question 32

function of capZ

Answer 32

prevents assembly and disassembly at microfilament plus ends

Question 33

enzyme not involved in the regulation of the citric acid cycle

Answer 33

succinate dehydrogenase (no NADH production)

Question 34

Pyruvate dehydrogenase is NOT regulated by ______

Answer 34

ATP

Question 35

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?

Answer 35

mannose is not phosphorylated in the cis-golgi network

Question 36

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

Answer 36

smooth

Question 37

_____ plants make use of the hatch-slack cycle

Answer 37

C4

Question 38

the calvin cycle occurs in the chloroplast _________

Answer 38

stroma

Question 39

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

Answer 39

resonance energy transfer

Question 40

two main types of microtubules

Answer 40

cytoplasmic and axonemal

Question 41

tissue specific

Answer 41

intermediate filaments

Question 42

function of cytochalasins

Answer 42

prevent addition of monomers to preexisting microfilaments

Question 43

chemotaxis

Answer 43

directional movement in response to a graded chemical stimulus

Question 44

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

Answer 44

dynactin

Question 45

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

Answer 45

true

Question 46

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

Answer 46

secreted from the cell

Question 47

Biosynthesis of sucrose occurs in the __________

Answer 47

cytosol

Question 48

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

Answer 48

true

Question 49

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

Answer 49

false

Question 50

T or F: microtubules are made of two monomeres

Answer 50

true

Question 51

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

Answer 51

false

Question 52

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

Answer 52

ER

Question 53

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

Answer 53

false

Question 54

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

Answer 54

gelsolin

Question 55

T or F: FADH2 transfers its electron to complex II

Answer 55

true

Question 56

substrates of citric acid cycle

Answer 56

oxaloacetate citrate isocitrate a ketoglutarate succinyl coa succinate fumarate malate

Question 57

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

Answer 57

false