Movement of water through apoplast stops at the level of ________ and crosses membrane to undergo symplast till xylem cells
1.starch sheath
2.inner layer of cortex
3.endodermis
4.all of the above
Which of the following combination of hormones will promote differentiation of shoot as well as root in tissue culture?
1. Gibberellin and abscisic acid
2. Auxin and abscisic acid
3. IAA and gibberellin
4. Auxin and cytokinin
A common phycobiont in lichens are
1. Cetraria
2.Microcystis
3. Trebouxia
4.Oedogonium
Amino acids with aromatic side chain are
1. tryptophan, asparagine, tyrosine
2.tryptophan, threonine, tyrosine
3.phenylalanine, tryptophan, serine
4.phenylalanine, tryptophan, tyrosine
An amino acid yielding acetyl CoA during catabolism is
1. ketogenic
2.glucogenic
3.essential
4. both glucogenic and ketogenic
Animals lacking excretory, respiratory and circulatory structures are
1.Sponges
2. Tapeworms
3. Liver fluke
4. Threadworms
Auxin is transported polarly. Mostly, auxin movement is
1.acropetal
2.basipetal
3.centripetal
4.both (a) and (c)
 Amino acids are mostly synthesised from
1. fatty acids
2. mineral salts
3.ðœ¶-Âketoglutaric acid
4.volatile acids
 Amino acids with the aliphatic ‘R’ group are
1.Glycine, alanine, leucine
2.Serine, threonine, cysteine
3.Lysine, arginine, histidine
4.Phenylalanine, tyrosine and tryptophan
 Application of ________ can delay abscission of fruits and leaves at early stages
1.gibberellic acid
2.ethylene
3. auxin
4. cytokinin
 In plants, water movement is
1. up the potential gradient in both symplast and apoplast
2. down the potential gradient in apoplast and up the potential gradient in symplast
3.down the potential gradient in both symplast and apoplast
4.down a potential gradient in symplast and up the potential gradient in apoplast
 In roots, most of the water flows through
1.Symplast
2.Apoplast
3. Imbibition
4.Active transport
 Pressure in roots develops due to
1.) low osmotic soil potential
2. rise in transpiration
3.active absorption
4.passive absorption
 Reindeer moss is a lichen known as
1. Usnea
2.Rocella
3. Cladonia
4. Parmelia
 Symplastic movement is slower than apoplastic movement because
1. molecule has to enter through cell membrane
2.it is down the gradient
3. as it involves cytoplasmic streaming always
4. all of the above
 The group of animals to which Sycon belongs can be best described as
1. Multicellular having tissue organization, but not a body cavity
2.Unicellular or acellular
3.Multicellular with a gastrovascular cavity
4.Multicellular without any tissue organization
 The simplest amino acid is
1. Glycine
2.Alanine
3.Asparagine
4.Tyrosine
 These are ‘multicellular grade’ entity
1.Vertebrates
2.Sponges
3.Prokaryotes
4.Coelenterates
 This about lichens is incorrect
1.Lichens are indicators of pollution
2.They grow rapidly about 2cm every day
3.Some species are eaten by reindeers
4.They have symbiotic relationship between alga and fungus
 This is a crustose lichen
1.Peltigera
2.Usnea
3.Rhizocarpon
4. None of the above
 This lichen is pioneer in xerosere
1. fruticose lichen
2. foliose lichen
3.crustose lichen
4.leprose lichen
 Uneven distribution of _______ results in phototropic curvature
1. phytochrome
2. auxin
3.gibberellin
4.cytokinin
 Which of the following amino acids is not necessary to be taken in the diet?
1.histidine
2.threonine
3.serine
4.lysine
 Which one of these is commonly used synthetic auxin?
1.NAA
2.IAA
3. IBA
4. GA
 _____________ is the name of the dried skeleton of ‘Venus flower basket’
1. Euplectella
2.Euspongia
3. Leucosolenia
4. Spongila
Collared, flagellated cells that cover large parts of the inner chambers of sponges, helping water circulation to continue are
1.Porocytes
2.Choanocytes
3. Amoebocytes
4. Pinacocytes
Commonly applied hormone in tea plantation is
1.abscisic acid
2. ethylene
3.indole-Â3-Âacetic acid
4. zeatin
Epimorphosis is regeneration through
1.The repatterning of existing cells as seen in hydra
2. The reinitiation of division in existing cells, followed by patterning, as occurs in amphibians such as newts
3. The repatterning of existing cells as seen in amphibians
4.The reinitiation of embryonic growth from remaining cells as seen in Hydra
Find the incorrect match
1. Abscisic acid Â- Stomatal closure
2. IAA Â- Cell wall elongation
3.Cytokinin Â- Cell division
4.Gibberellic acid Â- Leaf abscission
Flowering can be induced in pineapple by application of
1. Abscisic acid
2.NAA, 2,4Â-D
3.Phenylacetic acid
4.Cytokinin
In plants, this about apoplast and symplast water movement is true
1.being down a potential gradient
2.an equal rate of transport
3. conduction through interconnected protoplasts
4.assistance by cytoplasmic streaming
In the studies on the atmospheric pollution, lichens are important as they
1. can readily multiply in polluted atmosphere
2. are very sensitive to pollutants
3. efficiently purify the atmosphere
4.can also be grown in greatly polluted atmospherE
Ability to give rise to a new individual entity from body parts is
1.Reproduction
2. Fragmentation
3. Regeneration
4.Fission
Majorly, lichens are the pollution indicators of
1.CO
2.Mercury
3.NO2
4.SO2
Members of phylum Porifera are
1.Mostly freshwater animals but few are marine entities
2. Mostly marine animals but few are freshwater entities
3. Exclusively freshwater animal
4.Exclusively marine animals
Most of the movement in roots through apoplast is due to
1.endodermal cells are loosely packed and hence no resistance to water movement
2.medullary cells are loosely packed and hence no resistance to water movement
3. cortical cells are loosely packed and hence no resistance to water movement
4.pericycle cells are loosely packed and hence no resistance to water movement
Most of the scientists deem the algal-fungal relationship in lichens as helotism. Helotism is a
1.master-master relationship
2.master-slave relationship
3. a kind of mutualism
4. a kind of symbiotic association
Pick the incorrect statement regarding apoplast movement
1. movement of water is through mass flow
2.gradient-dependant
3. mass flow of water takes place as a result of cohesive and adhesive properties of water
4.continuous water stream gets tension when water is absorbed by root hairs
Regeneration of a limb or tail is an example of
1. Epimorphosis
2.Autotomy
3.Compensatory hypertrophy
4. Morphallaxis
Removal of apical bud results in
1.more axillary buds
2. flowering ceases
3.more lateral branches
4.plant growth ceases
The first amino acid of any polypeptide chain in eukaryotes is
1.valine
2. methionine
3. glycine
4.alanine
The naturally occurring proteins consist of
1. D-amino acids
2. L-amino acids
3.both (a) and (b)
4.none of these
The symbiotic association of algae and fungi is known as
1.Mycorrhiza
2. lichen
3.Mycoplasma
4.Both (a) and (b)
The Avena curvature test is an accurate bioassay for
1. ABA
2.GA3
3. IAA
4.Ethylene
This about sponges is true
1. one mouth, innumerable exits
2.innumerable mouths, one exit
3.large spacious stomach
4. spicules are composed of chitin
This is not part of apoplast
1. cell walls
2. vessels
3. intercellular spaces
4.sieve tubes
Vegetative reproduction in lichens takes place by
1. isidia
2. soredia
3. fragmentation
4.all of the above
Which among the following is not polymeric?
1.Carbohydrates
2.Nucleic acids
3. Proteins
4. Lipids
Which of the following amino acids has to be supplemented in the diet?
1. phenylalanine
2.cysteine
3. glutamine
4. asparagine
Which of the following statements does not hold true in context of apoplast?
1.occurs through intercellular spaces and cell walls
2.system of adjacent cell walls is continuous all through the plant
3. crosses cell membrane
4.discontinuous path at the place of casparian strips of endodermis in roots