Sunday, January 5, 2014

PLANT GROWTH AND DEVELOPMENT

1.    Part of the plant body where Abscisic acid is not synthesized but Cytokinins are synthesized is
    1) Leaves    2) Flowers
    3) Roots    4) Seeds
2.    If the influence of auxin on a particular part of the axis of a horizontally placed seedling is negative, then
    I) That organ shows positive phototropism
    II) That organ shows negative phtotropism
    III) That organ shows positive geotropism
    IV) That organ shows negative geotropism
    The correct combination is
    1) I and II    2) II and III
    3) II and IV    4) III and IV
3.    Avena coleotile curvature test, the bioassy for auxins, is used to
    1) Detect the presence of auxin in the Avena coleoptile tip
    2) Determine the strength of auxin in the Avena coleoptile tip
    3) Determine the activity of auxin in darkness
    4) Test the biological activity of auxin from test materials other than Avena
4.    Which of the following phytohormones have similar effect on leaf senescence
    1) ABA and Ethylene   2) ABA and Zeatin
    3) ABA and GA   
    4) Ethylene and 2-4D
5.    Select a phytohormone synthesized from a compound known as connecting link of aerobic respiration            ( NEET )
    1) A hormone promoting seed germination
    2) A hormone promoting root initiation
    3) A hormone promoting triple response growth
    4) A hormone promoting opening of stomata
6.    The importance of coleoptile tip in phototropic curvature was first experimentally confirmed by
    1) Julius von Sachs
    2) Charles Darwin and Francis Darwin
    3) Boysen-Jenson
    4) F.W. Went
7.    Which one of the following statements concerning growth regulators is incorrect
    1) Gibberellins cause the formation of more male flowers in Cannabis
    2) Abscisic acid maintains seeds in a dormant state
    3) Cytokinins increase the K+ concentration in guard cells
    4) Some synthetic auxins control grass weeds in pulse crops
8.    Study the following statements and select the correct ones
    1) Auxin is transported from base to tip in large quantities
    2) Cells on the dark side divide rapid than those on the light side
    3) Apical dominance can be removed by the decapitation
    4) Tropic movements in plants are under the control of gibberellins
9.    Name the gaseous hormone which stimulates transverse of isodiametric growth
    1) ethylene    2) ABA
    3) sodium salt of NAA
    4) ethephon
10.    Darwin discovered that Canary Grass coeloptile bends towards light only when
    1) It is 5 cm long
    2) The seedlings is growing in blue light
    3) Coeloptile tip is intact and exposed to light
    4) Cooler nights
11.    Bioassay for gibberellin is
    1) Avena curvature test
    2) Seed dormancy test
    3) Dwarf maize test
    4) Green leaf test
12.    A green plant bends towards the source of light when exposed to the light on only one side.  Which of the following is the best explanation of the phenomenon?
    1) The apices of the stems are attracted by light
    2) The plant needs light for photoshynthesis
    3) Auxin accumulates on the shaded side to induce great cell elongation on that side
    4) Light reduces length
13.    Currect sequence of different phases of growth is
    1) Cell division, Cell differentiation, Cell eleongation
    2) Cell differentiation, Cell division, Cell elongation
    3) Cell elongation, Cell division, Cell differentiation
    4) Cell division, Cell elongation, Cell differentiation
14.    Exogenous GA induces formation of male flowers on genetically female plants of
    1) Cucurbita    2) Luffa
    3) Cucumis    4) Carica
15.    The compounds having a highly specific hydrophilic group or adenine and one non specific lipophilic group are named as
    1) auxins    2) cytokinins
    3) gibberellins    4) ethylene
16.    Maximum concentration of cytokinins occurs in
    1) growing embryos and fruits
    2) apical buds
    3) lateral buds and fruits
    4) root tips
17.    The phenomenon of delay of senescence by cytokinins is known as
    1) Richmond Lang effect
    2) Senescence of effect
    3) Loomis and Torry effect
    4) Sorokinetal effect, 1962
18.    Ethylene is a by product of
    1) developing seeds
    2) ripening in some fruits
    3) developing ovules
    4) germinating seeds
19.    Match the following
    List-I    List-II
    1) Auxin    p) GA
    2) Gibberellin    q) Indole acetic acid
    3) Cytokinin    r) Abscisic acid
    4) Dormin    s) Acetic acid
        t) Zeatin
    The correct match is
    1) a-q,b-r,c-p,d-t    2) a-q,b-s,c-p,d-t
    3) a-q,b-p,c-t,d-r    4) a-q,b-t,c-p,d-r
20.    For the production of flowering
    1) only a short exposure to appropriate photoperiod is required
    2) exposure to appropriate photoperiod at any short intervals is required
    3) short exposure to appropriate photoperiod at intervals of one hour is required
    4) continuous exposure to appropriate photopheriods are required for flowering
21.    The hormone capable of replacing the requirement of long photoperiods for flowering is
    1) ethylene    2) auxin
    3) gibberellin    4) cytokinin

22.    (A) : Cytokinins are antisenescent
    (R) : Effect of cytokinins is antagonistic to ethylene
    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
23.    (A) : Gibberella fujikoroi causes bakane disease
    (R) : Fusarium moniliform is the perefect stage
    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
24.    (A) : Gibberellins, when applied to dwarf plant increase the length of the plant
    (R) : Gibberellins induce internodal growth in some genetically dwarf varieties
    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
25.    (A) : Cytokinins are produced in apical meristem region
    (R) : Cytokinins are essential for morphogenesis
    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
26.    Which one of the following pairs is not correctly matched?
    1) Adenine derivative - Kinetin
    2) Carotenoid derivative - ABA
    3) Terpenes - IAA
    4) Indole compounds - IBA
    5) Gas - Ethylene
27.    Identify two physioligical processes induced by two different phytohormones having a common precursor, which is formed due to the catalytic activity of pyruvic dehydrogenase complex   [EAMCET]
    I) More female flowers in cucumber
    II) -amylase production in barley grain
    III) Acceleration of fruit ripening in tomato
    IV) Delay in sprouting of potato tubers
    The correct combination is
    1) I and II    2) I and III
    3) II and IV    4) III and IV
28.    How does prunning help in making the hedge dense?
    1) It induces the differentiation of new shoot from root stock
    2) It frees axillary buds from apical dominance
    3) The apical shoot grows faster after prunning
    4) It releases wound hormones
29.    Pick out the correct statements [Kerala CEE]
    I) Cytokinins especially help in delaing senescence
    II) Auxins are involved in regulating apical dominance
    III) Ethylene is especially used in enhancing seed germination
    IV) Gibberellins are responsible for immature falling of leaves
    1) I and III    2) I and IV
    3) II and IV    4) I and II
30.    Identify the pair of physiological effects of two phytohormones, which are synthesized from different amino acids?   [EAMCET]
    I) Formation of perennating buds in Lemna
    II) Simultaneus flowering in pineapple
    III) Bolting in cabbage
    IV) Apical dominance in Polyalthia
    1) II and IV    2) I and IV
    3) II and III    4) I and II
31.    Identify two of the following phytohormones, which regulate the stomatal movements ? [KCET]
    I) IAA   II) GA    III) Zeatin   IV) ABA
    1) I and III    2) II and III
    3) III and IV    4) II and IV
32.    One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered, while in the other set night phase was interrupted by flash of light and it did not produce flower.  Under which of the following catagoties will you place this plant?
    1) Long day    2) Darkness neutral
    3) Day neutral    4) Short day

KEY :
    1) 3    2) 2    3) 4    4) 1    5) 1
    6) 2    7) 4    8) 3    9) 1    10) 3
    11) 3    12) 3    13) 4    14) 3     15) 2    16) 1    17) 1    18) 2    19) 3    20) 4     21) 3    22) 2    23) 3    24) 1    25) 2    26) 3    27) 3    28) 2    29) 4    30) 1    31) 3    32) 4   
NEET
1.    Gibberellic acid induces flowering in
    1) some plants only
    2) in long day plants under short day conditions
    3) in short day plants under long day conditions
    4) day neutral plants
2.    The hormones which regulate phloem transport are
    1) auxins    2) cytokinins
    3) gibberellins    4) ethylene
3.    Shock movement in ‘touch me not’ plant is
    1) seismonasty    2) photonasty
    3) chemonasty    4) thermonasty
4.    Increased availability of abscisic acid stimulates
    1) Lipid formation
    2) protein formation in cell
    3) starch synthesis is guard cells
    4) cellulose synthesis
5.    The tem photoperiodic after effect means
    1) providing the plant with appropriate photoperiods after the blossoming
    2) providing the plant with long exposures of appropriate photoperiods for flowering
    3) the effect of photoperiods after the flowering has occurred
    4) the production of flowers after a short exposure to appropriate photoperiods
6.    The phenomenon when plants require continuous photoperiodic treatment is known as
    1) Photoperiodic induction
    2) steady state induction
    3) fractional induction
    4) qualitative induction
7.    Photoperiodic induction can be produced
    1) when certain minumum vegetative growth has taken place
    2) when vegetative growth completely stops
    3) when plant reaches certain specific height
    4) irrespecitve of any of the above conditions
8.    The region of the spectrum which does not cause photoperiodic induction falls in
    1) blue region    2) red region
    3) green region    4) far red region
9.    Light break reaction means
    1) influence of short periods of dark in the light period
    2) influence of short periods of light in the dark periods
    3) influence of short periods of light in the dark periods
    4) production of some inhibitors during light periods
10.    Which of the following is the effect of a plant hormone which is synthesized more in the absence of light?
    1) Inhibits the development of seedless fruits
    2) Responsible for closing of stomata
    3) Induces the dormancy of seeds
    4) Length of intermodes increases

KEY

    1) 2         2) 2       3) 1        4) 3     5) 4
    6) 2    7) 1    8) 3    9) 2     10) 4

* * *

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

PHOTOSYNTHESIS IN HIGHER PLANTS

1.    The most distinguishable anatomical feature of C4 plants
    1) Presence of bundle sheath around vascular bundles
    2) Absence of chloroplasts in mesophyll cells
    3) Presence of agranal chloroplasts in mesophyll cells
    4) Absence of grana in bundle sheath chloroplasts
2.    Choose wrong combination with respect to the location of enzymes in C4 plants
    1) PEP case-stroma of mesophyll cell chloroplast
    2) RUBISCO-stroma of bundle sheath cell chloroplast
    3) Malic enzyme-stroma of bundle sheath cell chloroplast
    4) Pyruvate dikinase-stroma of mesophyll cell chloroplast
3.    Excessive elongation of plants and poor development of leaves when they were grown in darkness is called
    1) Foolish seedling disease    2) Bolting
    3) Embolism        4) Etiolation
4.    In Photosynthetic ‘Quinone cycle’ the number of electrons transferred from PQH2 to Cytochrome b6 is
    1) One    2) Two
    3) Three    4) Four
5.    Warburg effect is              ( NEET )
    1) The enhancement effect of light on Photosynthesis
    2) The feed back inhibition in Photosynthesis
    3) The inhibitory effect of high CO2 on Photosynthesis
    4) The inhibitory effect of high O2 on Photosynthesis
6.    In an experiment that carbon dioxide available to a C3 plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured. As photosynthesis proceeded, in which of the following molecules did the radioactivity first appear ?
    1) PGAL    2) PEP
    3)  PGA    4) RuBP
7.    In an experiment, the carbon dioxide available to a C4 plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured. As photosynthesis proceeded, in which of the following molecules did the radioactivity first appear ?
    1) Oxaloacetic acid    2) PEP
    3) Malic acid    4) RuBP
8.    Which of the following statements about absorption spectrum is correct ?
    1) At blue region absorption peak of Chl-b is at lower wavelength than that of Chl-a
    2)At red region absorption peak of  Chl-a is more than that of Chl-b
    3) At blue region absorption peak of Chl-a is more than that of Chl-b
    4) At red region absorption peak of Chl-a forms at lower wavelength than that Chl-b
9.    The following compounds are intermediates in the pathway of photorespiration     ( NEET )
    I) Phosphoglycolate    II) Serine
    III) Glyoxylate    IV) Glycine
    The correct sequence of their appearance in the pathway is
    1) I, II, III, IV    2) I, III, IV, II
    3) II, I, III, IV    4) II, I, IV, III
10.    Consider the following event in the photochemical conversion of light energy into chemical energy by chlorophyll during photosynthesis
    I) Charge separation   
    II) Absorption of qantum of energy
    III) Ejection of electron
    IV) Transfer of light energy
    1) IV, II, I, II    2) I, III, IV, II
    3) II, I, III, IV    4) II, I, IV, III
11.    Which of the following kinds of plant fixes carbon dioxide by way of crassulacean acid metabolism
    1) Oak tree    2) Cactus
    3) Grass    4) Red alga
12.    Assertion (A) :- In C4 plants, the total energy requirement for fixing CO2 by the combined C4 and Calvin cycle is five ATP and two NADPH per CO2 fixed   
    Reason    (R) :- C4 plants, consumes two excess ATP per CO2 molecule transported in comparison to C3 plant
13.    Assertion (A) :- The two carboxylations in C4 plants are spatially separated
    Reason    (R) :- PEP carboxylation occurs in mesophyll cell and RUBP carboxylation occurs in bundle sheath cells in C4 plants
14.    Assertion (A) :- Quinone cycle helps in building up H+ concentration in the lumen of the thylakoids
    Reason    (R) :- CF facilitates the transfer of three H+ from lumen to stroma for the formation every ATP molecule
15.    Assertion (A) :- The optimum temperature for C4 pathway is 300C-450C        ( NEET )
    Reason    (R) :- C4 plants show Warburg effect
16.    Inhibition of photosynthesis in high concentration of oxygen is mainly due to
    1) Distribution of RuBP carboxylase
    2)  Inactivation of RuBP carboxylase
    3) non-synthesis of RuBP carboxylase
    4) RuBP carboxylase acting as oxygenase
17.    DCMU kills the herbs by         ( NEET )
    1) Inhibiting photoreaction II of photosynthesis
    2) Checking electron transport system in photosynthesis from is PS-II to is PS-I   
    3) Inhibiting photoreaction-I of photosynthesis
    4) All of the above
18.    Assertion (A) :- Oxygen is not evolved during cyclic electron transport
    Reason    (R) :- Photolysis of water does not occur during cyclic electron transport
19.    Assertion (A) :- DCMU does not inhibit cyclic electron transport            ( NEET )
    Reason    (R) :- Cyclic transport does not
    involve the Q cycle
20.    In C4 plants, the bundle sheath cells
    1) Have thin walls to facilitate gaseous exchange
    2) Have large intercellular space
    3) Are rich in PEP carboxylase
    4) Have a high density of chloroplasts
21.    Which of the following statements is true with regard to the light reaction of photosynthesis ?
    1) In PS-II the reaction centre chlorophyll a has an obsorption peak at 700 nm hence, is called P700
    2) In PS-I the reaction centre chlorophyll  a has an absorption maxima at 680 nm and is called P680
    3) Photosystems -I and II are involved in Z scheme
    4) Only Lamellae of  grana have PS-I and PS-II

key
    1) 4        2) 1      3) 4      4) 1      5) 4 
    6) 3      7) 1      8) 1      9) 2      10) 4 
    11) 2     12) 2     13) 1     14) 2     15) 3
    16) 4    17) 2    18) 1     19) 3     20) 4
    21) 3

Saturday, January 4, 2014

EAMCET-2014 on May 17; test may go online from 2015

On the lines of CAT and BITSAT , the Engineering Agriculture and Medical Common Entrance Test (EAMCET) is likely to go online from 2015. 

An indication to this was given by the APSCHE Chairman, L. Venugopal Reddy in Hyderabad on Thursday. He said efforts were on to make the test online and sufficient time would be given for students before the decision is taken. 

He said the EAMCET for next year will be held on May 17 and the notification would be given on February 10. Results will be announced on June 9. The JNTU Hyderabad will conduct the test and N.V. Ramana Rao will be the Convenor.

Asthra