Sunday, January 5, 2014

RESPIRATION IN PLANTS

EAMCET
1.    Enzymes that catalyse the substrate level phosphorylation reactions in Glycolysis belong to
    1) Oxido-reductases    2) Transferases    3) Hydrolases    4) Ligases
2.    Which of the following reactions takes place in the matrix of the cell Organelle, that is referred to as ‘Power house of the cell’
    1) Hydration of Fumaric acid    2) Oxidation of Glycolic acid
    3) Dehydrogenation of Glyceraldehyde 3-phosphate
    4) Decarboxylation of Malic acid
3.    NADH + H+ is utilized in this reaction during alcoholic fermentation
    1) Conversion of Pyruvic acid to Acetaldehyde
    2) Conversion of GAP to Bisphosphoglyceric acid
    3) Conversion of Acetaldehyde to Ethyl alcohol
    4) Conversion of Pyruvic acid to Acetyl C0-A
4.    The enzyme that catalyses phosphorylation of the substrate without ATP molecule is
    1) Glyceraldehyde 3-phosphate dehydrogenase
    2) Glucose 6-phosphotransferase
    3) Phosphofructokinase
    4) Pynuvatedikinase
5.    Catalytic action of multienzyme complex, involving six different co-factors, is needed for the formation of
    1) Acetyl phosphate    2) Acetyl Co.A    3) Pyruvic acid    4) a-Ketoglutaric acid
6.    The only enzyme that catalyses the reduction of substrate in the biochemical reactions of Anaerobic respiration is
    1) Pyruvic decarboxylase    2) Glyceraldehyde phosphate dehydrogense    3) Alcohol dehydrogenase    4) Enolase
7.    How many oxygen atoms are required for Respiratory electron transport, for the oxidation of one molecule of 3 phosphoglyceric acid
    1) 14    2) 5    3) 10    4) 4
8.    Energy currency of the cell is with this molecular formula
    1) C16H10N5O13P3    2) C10H16N5O13P3    3) C10H16N5O3P13    4) C16H10N5O3P13
9.    Product of first biological oxidation in Kerbs cycle is
    1) Isocitric acid        2) Oxalosuccinic acid
    3)  Ketoglutaric acid    4) Succinic acid
10.    When one molecule of Glucose is completely oxidized in aerobic respiration, how many molecules of carbon dioxide are released in tricarboxylic acid cycles?
    1) one    2) six    3) three    4) four
11.    Calculate the number of ATP produced for one Glyceraldehyde 3-phosphate molecule by the end of aerobic respiration through Electron transport only.
    1) 20    2) 16    3) 15    4) 18
12.    Number of ATP generated in ETS on oxidation of reduced co-enzymes for one glucose molecules in cytosol by the end of aerobic respiration
    1) 4 ATP    2) 36 aTP    3) 32 ATP    4) 6 ATP
13.    Number of ATP molecules formed through oxidative decarboxylation reactions when one Glucose molecule is oxidized in aerobic respiration
    1) 11    2) 19    3) 15    4) 12
14.    The correct sequence of electron carriers (Cytochromes) in Respiratory electron transport system is
    1) a, a3, b, c, and c1    2) b, c, c1, a and a3    3) b, c1, c, a and a3    4) a3, a, c, c1 and b
15.    If one molecule of Pyruvic acid, which is formed as end product of Glycolysis, is subjected to anaerobic respiration, then there is
    1) Loss of 2 molecules of ATP    2) Gain of 2 molecules of ATP
    3) Gain of 4 molecules of ATP    4) Loss of 4 molecules of ATP
16.    The ATP output of aerobic respiration is more than that of anaerobic respiration per one glucose molecule by
    1) 18 times    2) 2 times
    3) 4 times    4) 8 times
17.    The number of oxidations, substrate level phosphorylations and decarboxylations respectively in HDP (glycolysis) pathway are
    1) 1,2,1    2) 2,1,0
    3) 1,2,0    4) 1,1,1
18.    Pick out the correct statement from following
    1) In glycolysis, hydration is followed dephosphorylation
    2) In link reaction, 2CO2 are removed from phyruvic acid
    3) One turn of Krebs cycle requires 3NAD+ 1 FAD
    4) In Krebs cycle, dehydration is immediate followed by oxidation
19.    The substrates of 1st oxidation and 4th oxidation of Kerbs cycle are formed respectively by
    1) Dehydration and hydration
    2) Hydration and dehydration
    3) Decarboxylation and cleavage
    4) Hydration and hydration
20.    In cellular respiration, oxygen is used as the final receptor of
    1) Nitrogen    2) Iron
    3) Carbon    4) Hydrogen
21.    One molecule of glucose requires 2 ATP to get phosphorylated to form Fructose 1-6 Biphosphate in glycolysis.  How many ATP are used in the same process if the substrate is fructose?
    1) 1    2) 2    3) 0    4) 4
22.    Total ATP through aerobic EMP pathway can be
    1) 6    2) 10
    3) 2    4) 8
23.    In how many steps is CO2 produced in aerobic respiration
    1) 1    2) 2
    3) 3    4) 6
24.    In Kerb’s cycle the first product is citric acid which is a 6-carbon compound.  It is formed by a condensing irreversible reaction between
    1) OAA and puruvic acid
    2) OAA and Acetyl CO-A
    3) Pyruvic acid and Acetyl CO-A
    4) OAA and citrate synthetase
25.    Largest amount of reduced coenzymes is produced in respiration during
    1) glycolysis
    2) Kreb’s cycle
    3) anaerobic respiration
    4) fermentation by yeast
26.    Ratio of ATP in aerobic and anaerobic respiration is
    1) 18 :2    2) 18 : 1
    3) 36 : 1    4) 4 : 1
27.    Ratio of CO2 produced in aerobic and anaerobic respiration is
    1) 3 : 1    2) 2 : 1
    3) 4 : 1    4) 1 : 1
28.    One molecule of pyruvic acid produces how many molecules of CO2 in mitochondrion
    1) 3    2) 2
    3) 4    4) 6
29.    Most of the energy in cell is liberated by the oxidation of carbohydrates when
    1) pyruvic acid is changed into CO2 & H2O
    2) pyruvic acid is converted into Acetyl CoA
    3) Sugar is coverted into Pyruvic acid
    4) glucose is converted into Alcohol & CO2
30.    In Krebs cycle how many oxidation (dehydrogenation) occur?
    1) 4    2) 6
    3) 2    4) 1
31.    According to Mitchell’s Chemiosmotic coupling theory of ATP formation, passage of 2e– form NADH2 over ETC releases energy to push out protons (PROTON PUMP).  These protons then pass inwardly through F1 head (ATP ase) to form ATP.  How many ATP are formed when three protons return to inner chamber through F1 of F0-F1 particle
    1) 1 ATP    2) 3 ATP
    3) 2 ATP    4) 36 ATP
32.    Number of electrons transported in ETS when one molecule of O2 is reduced to water
    1) 2    2) 8
    3) 6    4) 4
33.    Approximately how much Kcal energy is produced in biological oxidation per one molecule of glucose oxidation?
    1) 150       2) 3600    3) 686       4) 100
34.    Number of oxysome particles in each mitochondrion are
    1) 104    2) 104 to 105
    3) 105    4) countless
35.    Total ATP produced through ETS by oxidation of one molecule of glucose in Mitochondria of eukaryotes is
    1) 36       2) 38    3) 34     4) 32
36.    The free energy change from the breakdown of 1 molecule of glucose into 6CO2 and 6H2O is 686 k.cal, yet only about 273 k.cal of this is captured within 36ATP molecules.  The rest is
    1) lost as heat
    2) lost within CO2
    3) used to regenerate the TCA cycle
    4) used to reduced O2
37.    Cyt a3 has
    1) Fe and Cu    2) Fe
    3) Mn    4) Fe, Mn+Cl
38.    In mitochondria, how many ATP are formed by oxidation of 1 mol. of glucose during aerobic respiration
    1) 36         2) 34    3) 38         4) 30
39.    One turn of Kreb’s cycle produced how many ATP through ETS
    1) 22         2) 11    3) 12        4) 24
40.    Correct sequence of events in Kreb’s cycle is
    1) Acetyl CoAcitratepyruvate-ketoglutaratesuccinatemalate fumarateOAA
    2) Acetyl CoAcitric acid-ketoglutaric acidsuccinic acid fumaric acidmalic acidOAA
    3) Acetyl CoAcitric acidmalic acid -ketoglutaric acid -succinic acidOAA
    4) All are wrong
41.    Wounding of organs results in
    1) Decrease in rate of respiration
    2) Increase in rate of respiration
    3) stopping of respiration
    4) no effect on respiraion
42.    When one molecules of sucrose is subjected to glycolysis, it produces ... ATP molecules as net gain
    1) 4          2) 2    3) 0           4) 12
Assertion & Reason
1) Both (A) and (R) are true and (R) is the correct explanation of (A)
2) Both (A) and (R) are true and (R) is not the correct explanation of (A)
3) (A) is true but (R) is false
4) Both (A) are (R) wrong
43.    (A) : Kreb’s cycle is an amphibolic pathway
    (R) : Coenzymes are both oxidised and reduced during Kreb’s cycle
44.    (A) : Clostridium is a facultative anaerobe
    (R) : Ckistridium cannot sustain anaerobic conditions
45.    (A) : During NADH2 oxidation protons of matrix reach the perimitochondrial space through inner membrane
    (R) : During ATP formation H+ of perimito chondiral space reach matrix through F0-F1 particles.
46.    (A) : Acetyl Co.A is popularly known as connecting link between glycosis and Krebs cycle
    (R) : Acetyl Co.A is formed from the end product of glycolysis and it starts the Krebs cycle.
47.    (A) : The Krebs cycle is more productive step than glycolysis and link reaction in aerobic respiration
    (R) : Krebs cycle alone involve four oxidations out of six oxidation of aerobic respiration
48.    (A) : Net energy gain of anaerobic respiration is 2ATP
    (R) : In Anaerobes two glycolytic NADH are oxidized in the cytosol and 2 ATP obtained as net gain by SLP

KEY :
    1) 2    2) 1    3) 3    4) 1    5) 2   
    6) 3    7) 2    8) 2    9) 2    10) 4    11) 2    12) 1    13) 4    14) 3    15) 1    16) 1    17) 3    18) 3    19) 4    20) 4    21) 2    22) 4    23) 3    24) 2    25) 2    26) 2    27) 1    28) 1    29) 1    30) 1    31) 1    32) 4    33) 3    34) 2    35) 4    36) 1    37) 1    38) 2    39) 2    40) 2    41) 2    42) 1    43) 3    44) 4    45) 2    46) 1    47) 1    48) 1

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ASTHRA JUNIOR COLLEGE , VIJAYAWADA