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
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
A common phycobiont in lichens are
1. Cetraria
2.Microcystis
3. Trebouxia
4.Oedogonium
Posted Date:-2021-02-22 13:35:03
Amino acids with aromatic side chain are
1. tryptophan, asparagine, tyrosine
2.tryptophan, threonine, tyrosine
3.phenylalanine, tryptophan, serine
4.phenylalanine, tryptophan, tyrosine
Posted Date:-2021-02-22 13:35:03
An amino acid yielding acetyl CoA during catabolism is
1. ketogenic
2.glucogenic
3.essential
4. both glucogenic and ketogenic
Posted Date:-2021-02-22 13:35:03
Animals lacking excretory, respiratory and circulatory structures are
1.Sponges
2. Tapeworms
3. Liver fluke
4. Threadworms
Posted Date:-2021-02-22 13:35:03
Auxin is transported polarly. Mostly, auxin movement is
1.acropetal
2.basipetal
3.centripetal
4.both (a) and (c)
Posted Date:-2021-02-22 13:35:03
 Amino acids are mostly synthesised from
1. fatty acids
2. mineral salts
3.ðœ¶-Âketoglutaric acid
4.volatile acids
Posted Date:-2021-02-22 13:35:03
 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
Posted Date:-2021-02-22 13:35:03
 Application of ________ can delay abscission of fruits and leaves at early stages
1.gibberellic acid
2.ethylene
3. auxin
4. cytokinin
Posted Date:-2021-02-22 13:35:03
 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
Posted Date:-2021-02-22 13:35:03
 In roots, most of the water flows through
1.Symplast
2.Apoplast
3. Imbibition
4.Active transport
Posted Date:-2021-02-22 13:35:03
 Pressure in roots develops due to
1.) low osmotic soil potential
2. rise in transpiration
3.active absorption
4.passive absorption
Posted Date:-2021-02-22 13:35:03
 Reindeer moss is a lichen known as
1. Usnea
2.Rocella
3. Cladonia
4. Parmelia
Posted Date:-2021-02-22 13:35:03
 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
Posted Date:-2021-02-22 13:35:03
 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
Posted Date:-2021-02-22 13:35:03
 The simplest amino acid is
1. Glycine
2.Alanine
3.Asparagine
4.Tyrosine
Posted Date:-2021-02-22 13:35:03
 These are ‘multicellular grade’ entity
1.Vertebrates
2.Sponges
3.Prokaryotes
4.Coelenterates
Posted Date:-2021-02-22 13:35:03
 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
Posted Date:-2021-02-22 13:35:03
 This is a crustose lichen
1.Peltigera
2.Usnea
3.Rhizocarpon
4. None of the above
Posted Date:-2021-02-22 13:35:03
 This lichen is pioneer in xerosere
1. fruticose lichen
2. foliose lichen
3.crustose lichen
4.leprose lichen
Posted Date:-2021-02-22 13:35:03
 Uneven distribution of _______ results in phototropic curvature
1. phytochrome
2. auxin
3.gibberellin
4.cytokinin
Posted Date:-2021-02-22 13:35:03
 Which of the following amino acids is not necessary to be taken in the diet?
1.histidine
2.threonine
3.serine
4.lysine
Posted Date:-2021-02-22 13:35:03
 Which one of these is commonly used synthetic auxin?
1.NAA
2.IAA
3. IBA
4. GA
Posted Date:-2021-02-22 13:35:03
 _____________ is the name of the dried skeleton of ‘Venus flower basket’
1. Euplectella
2.Euspongia
3. Leucosolenia
4. Spongila
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
Commonly applied hormone in tea plantation is
1.abscisic acid
2. ethylene
3.indole-Â3-Âacetic acid
4. zeatin
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
Flowering can be induced in pineapple by application of
1. Abscisic acid
2.NAA, 2,4Â-D
3.Phenylacetic acid
4.Cytokinin
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
Ability to give rise to a new individual entity from body parts is
1.Reproduction
2. Fragmentation
3. Regeneration
4.Fission
Posted Date:-2021-02-22 13:35:03
Majorly, lichens are the pollution indicators of
1.CO
2.Mercury
3.NO2
4.SO2
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
Regeneration of a limb or tail is an example of
1. Epimorphosis
2.Autotomy
3.Compensatory hypertrophy
4. Morphallaxis
Posted Date:-2021-02-22 13:35:03
Removal of apical bud results in
1.more axillary buds
2. flowering ceases
3.more lateral branches
4.plant growth ceases
Posted Date:-2021-02-22 13:35:03
The first amino acid of any polypeptide chain in eukaryotes is
1.valine
2. methionine
3. glycine
4.alanine
Posted Date:-2021-02-22 13:35:03
The naturally occurring proteins consist of
1. D-amino acids
2. L-amino acids
3.both (a) and (b)
4.none of these
Posted Date:-2021-02-22 13:35:03
The symbiotic association of algae and fungi is known as
1.Mycorrhiza
2. lichen
3.Mycoplasma
4.Both (a) and (b)
Posted Date:-2021-02-22 13:35:03
The Avena curvature test is an accurate bioassay for
1. ABA
2.GA3
3. IAA
4.Ethylene
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03
This is not part of apoplast
1. cell walls
2. vessels
3. intercellular spaces
4.sieve tubes
Posted Date:-2021-02-22 13:35:03
Vegetative reproduction in lichens takes place by
1. isidia
2. soredia
3. fragmentation
4.all of the above
Posted Date:-2021-02-22 13:35:03
Which among the following is not polymeric?
1.Carbohydrates
2.Nucleic acids
3. Proteins
4. Lipids
Posted Date:-2021-02-22 13:35:03
Which of the following amino acids has to be supplemented in the diet?
1. phenylalanine
2.cysteine
3. glutamine
4. asparagine
Posted Date:-2021-02-22 13:35:03
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
Posted Date:-2021-02-22 13:35:03