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Bio 101 Glendale college > exam 2 2017 > Flashcards

exam 2 2017 Flashcards

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1
Q

reactions that require or consume free energy are called

A

endergonic reactions

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2
Q

T or F the G of a reaction depends on whether an enzyme is present or not

A

false

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3
Q

T or F enzymes lower the actication energy of the chemical reactions they catalyze

A

True

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4
Q

an inhibitor binds noncovelently to the active site of an enzyme what kind of inhibitor is it

A

Competitive

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5
Q

in a chemical reaction the rate
A. the rate depends on the value of G
B. the rate depends on the activation energy
C. the entropy change depends on the activation energy
D. the activation energy depends on the value of G
E. the change in free enery depends on the activation energy

A

B. the rate depends on the activation energy

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6
Q

H= G+TS. T is temp what is H, G, and S

A

H is enthalpy G is free energy and S is entropy

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7
Q

according to the second law of thermodynamics what happens when energy is converted from one form to another

A

the amount of usable energy decreases

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8
Q

some enzyme will not function properly without the binding of inorganic ions these ions are called

A

cofactors

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9
Q

where doest the citric acid cycle occur in eukaryotes

A

matrix of the mitochondria

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10
Q

what kind of cells are capable of glycolysis

A

all kinds/ universal

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11
Q

what kind of organisms can do photosynthesis

A

plants and some bacteria and some Protista

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12
Q

photosynthesis in green plants occurs during the day respiration inplants occurs

A

all the time

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13
Q

which of the following processes produce NADH

A. glycolysis 
B. Citric acid cycle 
C. pyruvate oxidation 
D a and B 
E. A B and C
A

E all of the above

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14
Q

triose phosphate (G3P) dehydrogenase catalyzes the conversion of gyceraldehyde 3-phosphate to ?

A

1, 3 biphosphoglycerate

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15
Q

during glycolysis what is the substrate for pyruvate kinase

A

phosphoenolpyruvate

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16
Q

which enzymes is most responsible for regulating the rate of glycolysis

A

phosphofructokinase

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17
Q

what is the product of the reaction catalyzed by rubisco during photosynthesis

A

3-phosophoglycerate

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18
Q

which of the following is a substrate for rubisco

A. oxygen
B. CO2
C. Glyceraldehyde 3- phosphate
D. RUMP
E both a and B
A

E both A and B

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19
Q

in which plants does lost of photorespiration occur when its hot and Dry

A

C3 plants

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20
Q

which of the following statements about CAM plants is false?

a. they use rubisco to fix carbon dioxide during the day
b. they use PEP carboxylase to fix carbon dioxide at night
c. Cactus are CAM plants
d. CAM plants don’t use the Calvin Cycle
e. CAM plants have both photosystem I and photosystem II

A

D CaM plants don use the calvin cycle

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21
Q

where does the calvin cycle take place in eukaryotes

A

in the stroma

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22
Q

some animals use their mitochondria to make the heat instead of ATP how do they do this ?

A

they have a special protein in the membrane that allows protons to diffuse across the membrane

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23
Q

what happens when a molecule (clorophyll for example) absorbs light

A

an electron is boosted to a higher energy level

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24
Q

the calvin cycle produces a 3 carbon molecule that leaves the cycle and maybe used to make glucose what is this molecule called

A

glyceraldehyde 3-phosphate

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25
Q

when pyruvate is converted to lactate what other products are formed>

A

NAD+

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26
Q

ATP synthase is locates where in eukaryotic cells ?

A

inner membrane o the mitochondria and thylakoid membrane

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27
Q

fermentation in eukaryotic cells occurs in the

A

cytoplasm

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28
Q

ATP synthase catalyzes a chemical reaction tht required energy what is the immediate source of energy used by ATP synthase?

A

proton gradient

29
Q

in the mitochondrial electron transport chain what donates electrons to oxygen directly ?

A

Cytochrome C oxidase

30
Q

oxaloacetate accepts an acetyl group from acetyl_CoA what molecule will be produced?

A

citrate

31
Q

which of the following are products of pyruvate oxidation

a. carbon dioxide
b. NADH
c. acetyl CoA
d. a and c
e. a,b, and c
A

e. a,b, and c

32
Q

which of the following prpcesses use oxygen

a. citric acid cycle
b. glycolysis
c. electron transport chain
d. a and c
e. a,b, and c

A

c. electron transport chain

33
Q

how many atp molecules can be made per molecule of glucose by glycolysis and cellular respiration

A

~32

34
Q

in human cells the fermentation process produces

A

Lactic acid

35
Q

before fats can be used as an energy source they must be hydrolyzed to

A

glycerol and fatty acids

36
Q

what organism did Leland hartwell use to study regulation of the eukaryotic cell cycle

A

yeast

37
Q

NADPH is a

A

coenzyme

38
Q

where does a substrate bind to an enzyme?

A

active site

39
Q

what enzyme is the main regulator of the citric acid cycle

A

isocitrate dehydrogenase

40
Q

what part of the electron transport chain accepts electrons from both succinate dehydrogenase and nadh-q reductase

A

ubiquinone

41
Q

write the balanced chemical equation that summarizes photosynthesis

A

6CO2 + 12H2O –> C6H12O6 + 6O2 + 6H2O

42
Q

WRITE THE BALANCED CHEMICAL EQUATION THAT SUMMARZES CELLULAR RESPIRATION

A

C6H12O6 + 6O2 -> 6CO2 + 6H2O

43
Q

NAME THE ENZYME FOR THIS REACTION

GLUCOSE–> GLUCOSE 6-PHOSPHATE

A

HEXOKINASE

44
Q

REACTIONS THAT REQUIRE OR CONSUME FREE ENERGY ARE CALLED

A

ENDERGONIC

45
Q

THE DELTA G OF A REACTION DEPENDS ON WHETHER AN ENZYME IS PRESENT OR NOT? t OR F

A

F

46
Q

AOME ENZYMES WILL NOT FUNCTION PROPERLY WITH OUT THE BINDING OF INORGANIC IONS THESE IONS ARE CALLED?

A

COFACTORS

47
Q

IN THE MITOCONDRIAL ELECTRON TRANSPORT CHAIN WHAT DONATES ELECTRONS TO OXYGEN DIRECTLY>

A

CYTOCHROME C OXIDASE

48
Q

WHICH OF THE FOLLOWING ARE PRODUCTS OF PYRUVATE OXIDATION

a CARBON DIOXIDE
B. NADH
C. ACETYL CoA

A

A B AND C

49
Q

HOW MANY ATP MOLECULES CAN BE MADE PER MOLECULE OF GLUCOSE BY GLYCOLYSIS AND CELLULAR RESPIRATION ?

A

~32

50
Q

IN HUMAN MUSCLE CELLS THE FERMENTATION PROCESS PRODUCES

A

LACTIC ACID

51
Q

WHICH OF THE FOLLOWING ARE PRODUCED BY THE CYCLIC ELECTRON TRANSPORT IN CHLOROPLAST

A. ATP 
B. CARBON DIOXIDE
C OXYGEN
D NDPH 
C ATP OXYGEN AND NADPH
A

A ATP

52
Q

WHICH OF THE FOLLOWING ARE PRODUCED BY NON CYCLIC ELECTRON TRANS PORT IN THE CHLOROPLAST

A. ATP 
B. CARBON DIOXIDE
C OXYGEN
D NDPH 
C ATP OXYGEN AND NADPH
A

ATP OXYGEN AND NADPH

53
Q

THE OXYGEN THAT IS PRODUCED DURNING PHOTOSYNTHESIS IS

A

MADE BY PHOTOSYSTEM II

54
Q

WHERE DOES THE CALVIN CYCLE TAKE PLACE IN EUKARYOTES

A

IN THE STROMA

55
Q

SOME ANIMALS USE THEIR MITOCHONDRIA TO MAKE HEAT INSTEAD OF ATP HOW DO THEYDO THIS ?

A

THEY HAVE A SPECIAL PROTEIN IN THE MEMBRANE THAT ALLOWS PROTONS TO DIFFUSE ACROSS THE MEMBRANE

56
Q

THE CALVIN CYCLE PRODUCES A 3 CARBON MOLECULE THAT LEAVES THE CYCLE AND MAY BE USED TO MAKE GLUCOSE WHAT IS THIS MOLECULE

A

GLYCERALDEHYDE 3 PHOSPHATE

57
Q

WHEN PYRUVATE IS CONVERTED TO LACTATE WHAT OTHER PROUCTS ARE FORMED

A

NAD+

58
Q

FERMINTATION IN EUKAYOTIC CELLS OCCURS IN THE

A

CYTOPLASM

59
Q

WHICH OF THE following processes produce O2?
a calvin cycle
b noncyclic electron transport
c cyclic electron transport

A

B non cyclic electron transport

60
Q

t or f ATP and NADPH are produced in the light reaction

A

true

61
Q

electrons are transferred from photosystem I to photosystem II during the lught reaction

A

false

62
Q

which of the following processes make NADPH

A glycolysis
B citric acid cycle
c electron transport chain

A

glycolysis and citric acid cycle

63
Q

what enzyme catalyzes the conversion of glucose to glucose 6-phospate

A

hexokinase

64
Q

what enzyme catalyzes the conversion of fructose-1,6bisphosphate to dihydroxyacetone phosphate and glyceraldehyde3-phosphate

A

aldolase

65
Q

triose phosphate dehydrogenase catalyses the conversion of glyceraldehyde 3-phosphate

A

1,3bisphospglycerate

66
Q

GLYCOLYSIS IS AN AEROBIC REACTION

A

FALSE

67
Q

WHAT IS THE PRODUCT CATALYZED BY RUBISCO

A

3-PHOSPHOGLYCERATE

68
Q

IN NONCYCLIC PHOTOSYNTHETIC ELECTON TRANSPORT WATER IS USED TO ?

A

REDUCE CHLOROPHYLL

69
Q

WHAT OCCURS IN THE THYLACOID MEMBRANE

A

LIGHT REACTION AND PHOTOSYNTHESIS

Bio 101 Glendale college (7 decks)

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