Neet
·
1) Kreb's has been awarded Nobel Prize in 1953 for explaining
A)
Energy forming process in the cell
B)
ATP metabolism
C)
Respiration chain
D)
Oxidation of cytoplasm
·
2) The product formed by maleic dehydrogenase is
A)
Maleic acid
B)
Fumaric acid
C)
Oxaloacetic acid
D)
Succinic acid
·
3) In presence of TPP and carboxylase, pyruvic acid is transformed
into
A)
Acetaldehyde and
CO2
B)
Ethyl alcohol and
CO2
C)
Citric acid and
CO2
D)
None of the above
·
4) TCA cycle is a
A)
Direct oxidation pathway
B)
Indirect oxidation pathway
C)
Both [a] and [b]
D)
None of the above
·
5) Hydrogen of malate is accepted by
A)
FAD
B)
FMN
C)
NAD
D)
COQ
·
6) Which of the coenzyme is used in acetylation reaction
A)
CoA
B)
FAD
C)
FMN
D)
None of the above
·
7) Ferredoxin is a
A)
Protein
B)
Fat
C)
Phenol
D)
None of the above
·
8) Which intermediate compound is involved in the synthesis of
amino acids
A)
Malic acid
B)
Citric acid
C)
α−
ketogluteric acid
D)
Isocitric acid
·
9) In ATP molecule energy is stored in
A)
Chemical bonds
B)
Hydrogen bonds
C)
Carbon bonds
D)
Pyrophosphate bonds
·
10) The process by which the energy of glucose is released under
aerobic respiration was discovered by
A)
Hopkins
B)
Lister
C)
Kreb's
D)
Pasteur
·
11) Kreb's cycle is termed as the aerobic phase of respiration
because
A)
It consumes oxygen
B)
Oxygen acts as a catalyst
C)
Aerobic conditions are essential for the continued operation of electron
transport system
D)
All the above
·
12) Between which of the following stages GTP is formed by
substrate level phosphorylation
A)
Succinate to fumarate
B)
Ketoglutarate to succinate
C)
Oxalosuccinate to glutarate
D)
Fumarate to malate
·
13) How many molecules of ATP are produced per molecule of
FADH2
oxidised
A) One
B) Two
C) Three
D) Four
·
14) A molecule of ATP is formed when electron passes from
A)
Cyt c to Cyt a
B)
Cyt a to Cyt c
C)
Cyt b to Cyt c
D)
Cyt c to Cyt b
·
15) Which of the following is not a part of Kreb's cycle
A)
Dehydrogenation
B)
Acetylation
C)
Oxidative phosphorylation
D)
Decarboxylation
·
16) The number of steps required for oxidation of one molecule of
pyruvic acid is
A)
5
B)
6
C)
3
D)
12
·
17) Kreb's cycle is also known as [NCERT 1975; EAMCET 1981; BHU
1978]
A)
Glyoxylate cycle
B)
EMP pathway
C)
Citric acid cycle
D)
Glycolate cycle
·
18) Synthesis of ATP in mitochondria require [BHU 1979; DPMT 1992]
A)
Oxygen
B)
NADP
C)
FMN
D)
Pyruvic acid
·
19) The universal hydrogen acceptor is [CPMT 1980; DPMT 1992]
A)
NAD (Coenzyme-I)
B)
ATP
C)
CoA
D)
FMN
·
20) Most of the energy in the cell is liberated by oxidation of
carbohydrate when [BHU 1980]
A)
Pyruvic acid is converted into
CO2
and
H2O
B)
Pyruvic acid is converted into Acetyl
CoA
C)
Sugar is converted into pyruvic acid
D)
Glucose is converted in alcohol and
CO2
·
21) Complete oxidation of 1 gm molecule of glucose gives rise to
[CPMT 1980; MP PMT 1991]
A)
68,60,000 cal
B)
6,86,000 cal
C)
68,600 cal
D)
6,800 cal
·
22) Link between glycolysis and Kreb's cycle is [CBSE PMT 1997,
2000; BHU 1982, 2000; MP PMT 1987, 89, 93, 98, 2001; CPMT 2001; BVP 2001; MHCET
2004]
A)
Citric acid
B)
Acetyl CoA
C)
Succinic acid
D)
Oxaloacetic acid
·
23) In respiration, pyruvic acid is [CPMT 1984, 88; MP PMT 1986]
A)
Formed only when oxygen is available
B)
One of the product of Kreb's cycle
C)
Broken down into two carbon fragments and
CO2
D)
A result of protein breakdown
·
24) Organelles which are regarded as 'Power house of the cell' and
in which oxidative reaction of respiratory process take place are [CPMT 1984]
A)
Chloroplast
B)
Ribosome
C)
Mitochondria
D)
Endoplasmic reticulum
·
25) ATP synthesis occurs on the [AIIMS 1984]
A)
Outer membrane of mitochondrion
B)
Inner membrane of mitochondrion
C)
Matrix
D)
None of the above
·
26) The reaction of Kreb's cycle take place [CPMT 1984, 85, 88,
93, 94; BHU 1985, 88; CBSE PMT 1996; MP PMT 1997; JIPMER 2001; AIEEE 2003]
A)
In cytoplasm
B)
In endoplasmic reticulum
C)
In matrix of mitochondria
D)
On the surface of mitochondrion
·
27) Which of the following is the site of respiration within the
cell [CPMT 1984; RPMT 1995; Bihar MDAT 1995; AFMC 2003]
A)
Ribosomes
B)
Nucleus
C)
Golgi body
D)
Mitochondria
·
28) Mitochondria is the site of [CPMT 1985]
A)
CO2
uptake in photosynthesis
B)
O2
uptake during respiration
C)
The release of energy during respiration
D)
Cell division
·
29) Largest amount of phosphate bond energy is produced in the
process of respiration during [CPMT 1984; DPMT 1991; BHU 2002]
A)
Anaerobic respiration
B)
Glycolysis
C)
Kreb's cycle
D)
None of the above
·
30) In Kreb's cycle the hydrogen atoms removed at succinate level
are accepted by [CPMT 1985]
A)
FAD
B)
ADP
C)
ATP
D)
NAD
·
31) Which of the following observation most strongly support the
view that mitochondria contain electron transfer enzymes aggregated into
compact associations [AIIMS 1985; BHU 1991]
A)
A contractile protein capable of utilizing ATP has been obtained from
mitochondria
B)
Mitochondria have highly folded inner wall
C)
Disruption of mitochondria yields membrane fragments which are able to
synthesize ATP
D)
Mitochondria in animal embryos have a tendency to concentrate in cells which
are to become part of locomotory structures
·
32) Oxidative
phosphorylation occurs in [DPMT 1985; CPMT 1983; CET Pune 1998]
A)
Outer membrane of mitochondria
B)
Inner membrane of mitochondria
C)
Stroma of chloroplast
D)
Grana of chloroplast
·
33) Kreb's cycle starts with the formation of six carbon compounds
by reaction between [RPMT 1985]
A)
Maleic acid and acetyl CoA
B)
Succinic acid and pyruvic acid
C)
Fumaric acid and pyruvic acid
D)
Acetyl CoA and oxaloacetic acid
·
34) Respiratory enzymes are located in [DPMT 1986; MP PMT 2001;
AMU 2005]
A)
Mitochondrial matrix (mitochondria)
B)
Perimitochondrial space
C)
Cristae
D)
Outer membrane
·
35) Food is converted to energy in [DPMT 1987]
A)
Chloroplast
B)
Nucleus
C)
Mitochondria
D)
None of the above
·
36) The cycle in which pyruvic acid is broken down in presence of
oxygen is known as [MP PMT 1988]
A)
Glycolysis
B)
Kreb's cycle
C)
Anaerobic respiration
D)
None of the above
·
37) Which of the following is correct sequence in Kreb's cycle
[BHU 1989]
A)
Isocitric acid
→
Oxalosuccinic acid
→
α−
ketogluteric acid
B)
Oxalosuccinic acid
→
Isocitric acid
α−
ketogluteric acid
C)
α−
ketogluteric acid
→
Isocitric acid
→
Oxalosuccinic acid
D)
Isocitric acid
→
α−
ketogluteric acid
→
Oxalosuccinic acid
·
38) In how many steps,
CO2
is released in aerobic respiration of pyruvic acid [MP PMT 1989]
A) One
B) Six
C) Three
D) Twelve
·
39) In which among the following oxidative phosphorylation occurs
during electron transport [CPMT 1990]
A)
Chloroplast
B)
Ribosomes
C)
Mitochondria
D)
Glyoxysomes
·
40) The formation of acetyl coenzyme-A from pyruvic acid is the
result of its [CPMT 1990]
A)
Reduction
B)
Dehydration
C)
Dephosphorylation
D)
Oxidative decarboxylation
·
41) Oxidation of succinate to fumerate in the Kreb's cycle is due
to [CPMT 1990]
A)
Loss of electron from it
B)
Removal of hydrogen from it
C)
Addition of oxygen to it
D)
None of the above
·
42) Oxidative phosphorylation and photophosphorylation both
require the electron carrier [MP PMT 1990]
A)
Cytochrome
B)
Oxygen
C)
Carbon dioxide
D)
Water
·
43) Cytochrome helps in [AFMC 1994; MP PMT 1996]
A)
Oxidation of glucose
B)
Release of energy
C)
Electron transport
D)
Growth
·
44) Cellular energy is provided through respiration and oxidation
by [DPMT 1991]
A)
Golgi apparatus
B)
Endoplasmic reticulum
C)
Ribosomes
D)
Mitochondria
·
45) Aerobic respiration which yields maximum ATP molecules is
completed on [AMU 1990; BHU 1999]
A)
Mitochondria
B)
General cytoplasm
C)
General cytoplasm and mitochondria
D)
Somewhere else
·
46) The membrane bound enzyme involved in Kreb's cycle is [AIIMS
1994]
A) Malate dehydrogenase
B) Fumarase
C) cis acotinase
D)
Succinic dehydrogenase
·
47) Biological oxidation in Kreb's cycle involves [MP PMT 1994]
A)
N2
B)
CO2
C)
O2
D)
SO2
·
48) Oxidative phosphorylation is the formation of [CBSE PMT 1992;
BHU 1994, 99]
A)
NADPH2
in respiration
B)
ATP in respiration
C)
NADPH2
in photosynthesis
D)
ATP in photosynthesis
·
49) Mineral activator needed for the enzymes carboxylase of TCA
cycle is [NCERT 1975, 79]
A)
Mg++
B)
Fe+++
C)
Mo++
D)
Mn++
·
50) Kreb's cycle involves the formation of [AFMC 1987]
A)
Lactic acid from glucose
B)
Change of pyruvic acid to energy transformation
C)
Pyruvic acid from glucose
D)
ATP from ADP
·
51) In the electron transport system, the reduced coenzymes are
regenerated by [CPMT 1990]
A)
Loss of hydrogen
B)
Loss of electron
C)
Addition of oxygen
D)
None of the above
·
52) In an electron transport chain in terminal oxidation the
cytochrome which donates electrons to
O2
is [CPMT 1990]
A) Cytochrome b
B) Cytochrome c
C) Cytochrome
a3
D) Cytochrome a
·
53) Kreb's cycle begins with [CBSE PMT 1991]
A)
Pyruvic acid
B)
Hydrochloric acid
C)
Corticosteroids
D)
Lysine
·
54) In ETS, electron combines to [CPMT 1994]
A)
Cytochrome
B)
H2
C)
O2
D)
H2O
·
55) Enzymes of oxydative phosphorylation found in [CPMT 1983, 84;
RPMT 1995; JIPMER 2001]
A)
Endoplasmic reticulum
B)
Chloroplast
C)
Mitochondria
D)
Golgi complex
·
56) The full form of NAD is [CPMT 1977]
A)
Nicotine adenosine diphosphate
B)
Nicotinamide adenosine dinucleotide
C)
Nicotinamide adenine dinucleotide
D)
Nicotinamide adenine diphosphate
·
57) The last or terminal cytochrome in respiratory chain is [CBSE
PMT 1992; RPMT 1997]
A)
Cytb
B)
Cyta3
C)
Cyta
D)
Cytc
·
58) Upon the oxidation of one mole of pyruvate by mitochondrial
respiration, the moles of ATP generated are [BHU 1994; KCET 1998]
A)
38
B)
30
C)
8
D)
15
·
59) Kreb's cycle is also called [EAMCET 1995]
A)
TCA cycle
B)
Citric acid cycle
C)
Tricarboxylic cycle
D)
All the above
·
60) Kreb's cycle is found in [AFMC 1996]
A)
Anaerobic respiration
B)
Photorespiration
C)
Photosynthesis
D)
Aerobic respiration
·
61) The importance of Kreb's cycle is in the production of [MP PMT
1996]
A)
Acetyl CoA
B)
Water
C)
ATP
D)
ADP
·
62) The correct sequence of electron acceptor in ATP synthesis is
[CBSE PMT 1997]
A)
Cytaa b c
B)
Cytb c a a3
C)
Cytb c a3 a
D)
Cytc b a a3
·
63) In Kreb's cycle, the FAD precipitates as electron acceptor
during the conversion of [CBSE PMT 1997]
A)
Succinyl CoA to succinic acid
B)
a-ketoglutarate to succinyl CoA
C)
Fumaric acid to maleic acid
D)
Succinic acid to fumaric acid
·
64) Which transfer electrons in E.T.S. (electron transport system)
[CPMT 1998]
A)
Phytochrome
B)
F1
particles
C)
Fe - S
D)
Cytochrome
·
65) The pyruvic acid formed in Glycolysis is oxidised to
CO2
and
H2O
in a cycle called [MP PMT 1999]
A) Calvin cycle
B) Hill reaction
C) Kreb's cycle
D) Nitrogen cycle
·
66) Which one of the following energy storing compound is formed
when succinyl CoA is converted into succinic acid [BHU 2000]
A)
ADP
B)
ATP
C)
AMP
D)
GTP
·
67) Which of the following is not an electron transferring
molecule [KCET 2001]
A)
ATP
B)
NAD+
C)
Fe-S protein
D)
Co-enzyme Q
·
68) Cytochromes are [CBSE PMT 2001]
A)
Lipid
B)
Glycoprotein
C)
Metalloporphyrins
D)
Fe++
containing with porphyrin pigment
A)
Cristae of mitochondria
B)
Matrix of mitochondria
C) Outer mitochondrial membrane
D) Entire inner mitochondrial membrane
·
70) Final electron acceptor in ETS is [Kerala CET 2002; CPMT 2003;
BHU 2004]
A)
H2O
B)
O2
C)
cvta3
D)
cvta
·
71) Kreb's cycle takes place in [BVP 2001; MHCET 2002]
A)
Chloroplast
B)
Peroxisomes
C)
Mitochondria
D)
Cytoplasm
·
72)
FADH2
is produced during the following reaction [MHCET 2002]
A) Succinic acid to
fumaric acid
B) Fumaric acid to
malic acid
C) Succinyl Co-A to
succinic acid
D) Isocitric acid to
oxaloacetic acid
·
73) The order of occurrence of the cytochromes in the
F1
particles is [MHCET 2002]
A)
cyt b, cyt c, cyt a−cyt a3
B)
cyt c, cyt b, cyt a−cyt a3
C)
cyt a, cyt b, cyt c−cyt a3
D)
cyt a3−cyt a, cyt c, cyt b
·
74) In which one of the following do the two names refer to one
and the same thing [CBSE PMT 2003]
A)
Tricarboxylic acid cycle and urea cycle
B)
Kreb's cycle and Calvin cycle
C)
Tricarboxylic acid cycle and citric acid cycle.
D)
Citric acid cycle and Calvin cycle
·
75) Kreb's cycle is also called as: [MHCET 2003]
A)
Tricarboxylic acid cycle
B)
Oxidative phosphorylation
C)
EMP pathway
D)
Glycolysis
·
76) Which of the following is produced during Kreb's cycle [BVP
2003]
A)
Citric acid
B)
Lactic acid
C)
Acetyl coenzyme-A
D)
Acetic acid
·
77) Activity of succinic dehydrogenase involves the following in
TCA cycle [DPMT 2004]
A)
NAD
B)
FAD
C)
GDP
D)
ATP
·
78) In oxidative photophosphorylation, the last 3 steps are as
follows [Orissa JEE 2004]
Q→C→aa3→O2
A)
Q→C
is
H+
absorbing site
B)
aa3→O2+H+
yielding site
C)
Q→C
is
H+
yielding site and
aa3→O2
is
H+
absorbing site
D) No
H+
is absorbed or released
·
79) Which of the following does not function as an electron
carrier [Kerala PMT 2004]
A)
Coenzyme Q
B)
Cytochrome-c
C)
Cytochrome-a
D)
Cytochrome
−a3
E)
H2O
·
80) The enzymes for electron transport system are located in the
[Kerala PMT 2004]
A)
Plastid
B)
Endoplasmic reticulum
C)
Ribosomes
D)
Mitochondria
E)
Golgi bodies
·
81) During which stage in the complete oxidation of glucose are
the greatest number of ATP molecules formed from APD [CBSE PMT 2005]
A)
Conversion pyrubic acid to acetyl CoA
B)
Electron transport chain
C)
Glycolysis
D)
Kreb's cycle
·
82) Which of the following is not an intermediate of Kreb's cycle
[Bihar 2005]
A)
Acetyl Co-A
B)
Citric acid
C)
Succinic acid
D)
Lactic acid
·
83) Which can accept a hydride ion during electron transduction
system [Manipal 2005]
A)
FADH, NADH
B)
FAD+, NADP+
C)
FAD+, NADH
D)
FADH, NAD+
·
84) In aerobic respiration citric acid cycle takes place in
[Orissa JEE 2005]
A)
Cytosol
B)
Mitochondria
C)
Peroxisomes
D)
Endoplasmic reticulum
A) Ubiquinone
B) Acetyl CoA
C) Tricarboxylic acid
D) Ferricyanide
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