Physiology of Plants MCQs Part 12

1) In germinating castor seeds, the R.Q is
a) Less than one
b) More than one
c) One
d) Zero

2) In the hexose monophosphate shunt, the number of molecules of carbon dioxide evolved is
a) Less than glycolysis
b) Much less than glycolysis
c) More than glycolysis
d) Same as glycolysis

3) In succulents, the respiratory quotient is less than one due to
a) Incomplete oxidation
b) Incomplete reduction
c) Complete reduction
d) Complete oxidation

4) When one glucose molecule is completely oxidised, it changes
a) 36 ADP molecules into 36 ATP molecules
b) 38 ADP molecules into 38 ATO molecules
c) 30 ADP molecules into 30 ATP molecules
d) 32 ADP molecules into 32 ATP molecules

5) The terminal cytochrome of the respiratory chain which donates electrons to oxygen is
a) Cyt b
b) Cyt. c
c) Cyt. a1
d) Cyt. a3

6) Which one is a product of aerobic respiration?
a) Malic acid
b) Ethyl alcohol
c) Lactic acid
d) Pyruvic acid

7) How much usable energy is available during oxidative combustion of 1 gm mole of glucose in the body?
a) 686999 cal
b) 304000 cal
c) 277400
d) 686 cal

8) The number of ATP produced from one pyruvic acid during conversion to acetyl CoA is
a) 3
b) 5
c) 8
d) 15

9) a-Ketoglutarte dehydrogenase brings about
a) Oxidation and decarboxylation
b) Oxidation
c) Decarboxylation
d) Reduction

10) Substrate phosphorylation occurs during
a) Fumaric acidÝMalic Acid
b) Oxalosuccinic acidÝa-ketoglutaric acid
c) Succinic acidÝFumaric acid
d) a-Ketoglutaric acidÝSuccinic acid

11) The energy required to form glucose from pyruvate is equivalent to
a) 32 ATP
b) 16 ATP
c) 8 ATP
d) 4 ATP

12) The enzyme pair common to both EMP and C3 cycle is
a) Aldolase and enolase
b) Aldolase and triose Phosphate isomerase
c) Phosphoglyceromutase and triose phosphate isomerase
d) Cytochrome oxidase and enolase

13) The energy required to synthesise ATP from ADP and inorganic phosphate is
a) 2500 cal
b) 7600 cal
c) 12000 cal
d) 20000 cal

14) How many ATP does the metabolism of one palmitic acid molecule yield?
a) 36 ATP
b) 56 ATP
c) 129 ATP
d) 48 ATP

15) A sudden change from anaerobic to aerobic process produces the
a) Pasteur effect
b) Emerson effect
c) Blackman’s law
d) Chargaff’s rule

16) When malic acid is the respiratory substrate, the amount of CO2 released is
a) More than O2 consumed
b) Less than O2 released
c) Equal to O2 consumed
d) CO2 is not released

17) In respiration
a) 2 PGAL are formed in glycolysis and none in Krebs cycle
b) 6 PGAL in glycolysis, 3 PGAL in Krebs cycle
c) 8 PGAL in glycolysis, 3 PGAL in Krebs cycle
d) PGAL formation does not occur in respiration

18) The process taking place in the mitochondrial electron transport chain is
a) Cyclic phosphorylation
b) Oxidative phosphorylation
c) Noncyclic phosphorylation
d) Photooxidation

19) A single turn of the citric acid cycle yields
a) 2 FADH2, 2 NADH2, 2 GTP
b) 1 FADH2, 2NADH2, 1 GTP
c) 1 FADH2, 3 NADH2, 1 GTP
d) 1 FADH2, 4 NADH2, 1 GTP

20) There is no transfer of electrons from cyt b to cyt c as
a) Energy is not available
b) The two are not nearby
c) Electrons are transported in pairs
d) Electrons have no affinity for cytochromes

21) Pisum sativum is a/an
a) Autotroph
b) Heterotrop
c) Shurb
d) Tree

22) Which of the following parasites is also epiphytic?
a) Striga
b) Orobanche
c) Balanophora
d) Cuscuta

23) A plant expected to have an age of 1500 years is
a) Eucalyptus
b) Sequoia
c) Mangifera india
d) Dalbergia sisso

24) Myrmecophily is a beneficial association between a flowering plant and
a) Ants
b) Mycoplasma
c) Bacteria
d) Viruses

25) Which of these is a total root parasite?>
a) Rafflesia
b) Cassytha
c) Viscum
d) Loranthus

26) The longest plants of the world mostly belong to
a) Gymnosperms
b) Monocots
c) Dictos
d) Tree ferns

27) Cauliflory is the production of flowers
a) On an old stem from dormant buds
b) On young branches
c) From epiphyllous buds
d) In clusters

28) Which of the following is not a stem modification?
a) Ginger
b) Mango Ginger
c) Potato
d) Garlic

29) A root is a prolongation of the
a) Plumule
b) Radicle
c) Coleoptile
d) Periblem

30) In Maize, the fibrous roots develop from the
a) Lower nodes
b) Upper Nodes
c) Upper internodes
d) Non of the above

31) Roots have thorny branches in
a) Vanilla
b) Asparagus
c) Acanthorhiza
d) Pothos

32) Climbing roots occur in
a) Vanilla
b) Vanda
c) Pongamia
d) Taeniophyllum

33) Which of the following plants are used as green manure in crop fields and in sandy soils?
a) Crotalaria juncea and Alhagi camelrum
b) Calotropis procera and Phyllanthus niruri
c) Saccharum munja and Lantana camara
d) Dichanthium annulatum and Azolla nilotica

34) Which of the following has succulent roots?
a) Opuntia
b) Agave
c) Aloe
d) Asparagus

35) When four stamens are long and two short, arranged in two whorls, the condition is
a) Epiphyllous
b) Didynamous
c) Polyadelphous
d) Tetradynamous

36) The tetradynamous condition has
a) Six stamens, two short and four long
b) Six stamens, two long and four short
c) Six stamens, two short in outer whorl and four long in inner whorl
d) Four stamens, two short and two long in outer and inner whorls respectively

37) The long silky hair emerging from the cob of Maize are
a) Meant for fruit dispersal
b) Meant for attracting insects
c) Meant for protecting seeds
d) Long styles and stigmas

38) The thalamus is the
a) Base of flower
b) Base of ovary
c) Modification of pollen
d) Modification of petal

39) An inferior ovary occurs in
a) Cruciferae
b) Compositae
c) Malvaceae
d) Ranunculaceae

40) A filament attached along the whole length of the anther is the condition called
a) Adnate
b) Dorsifixed
c) Basifixed
d) Versatile

41) A tetradynamous condition occurs in
a) Petunia hybrida
b) Helianthus annuus
c) Brassica campestris
d) Hibiscus rosa sinensis

42) Identify the wrong statement:
a) A plant that bears male, female and bisexual flowers is polygamous
b) Actinomorphic flower can be dissected into two equal halves from any plane
c) Superior ovary is found in hypogynous flowers
d) Side of the flower towards the bract is called posterior side

43) Long filamentous threads protruding at the end of young cob of Maize are
a) Hairs
b) Anthers
c) Styles
d) Ovaries

44) When pistillate and bisexual flowers develop on different plants, the condition is
a) Gynodioecious
b) Gymnomonoecious
c) Polygamodioecious
d) Polygamonoecious


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