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TN TRB Assistant Professor Botany Paper-1 Exam - English

Duration: 180 · Questions: 130 · Max Marks: 130 · Language: 3

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Tamil

1
தமிழில் மொத்த எழுத்துக்கள் எத்தனை?
  1. A. 240
  2. B. 247
  3. C. 250
  4. D. 257
2
குறில் எழுத்துக்களின் ஒலிக்கும் கால அளவு என்ன?
  1. A. 1 மாத்திரை
  2. B. 2 மாத்திரை
  3. C. 1/2 மாத்திரை
  4. D. 3 மாத்திரை
3
நெடில் எழுத்துக்களின் ஒலிக்கும் கால அளவு என்ன?
  1. A. 1 மாத்திரை
  2. B. 2 மாத்திரை
  3. C. 1/2 மாத்திரை
  4. D. 3 மாத்திரை
4
மெய்யெழுத்துக்களின் ஒலிக்கும் கால அளவு என்ன?
  1. A. 1 மாத்திரை
  2. B. 2 மாத்திரை
  3. C. 1/2 மாத்திரை
  4. D. 3 மாத்திரை
5
"க்" என்பது எந்த வகை எழுத்து?
  1. A. உயிரெழுத்து
  2. B. மெய்யெழுத்து
  3. C. ஆய்தம்
  4. D. உயிர்மெய்
6
"அ" என்பது எந்த வகை எழுத்து?
  1. A. உயிரெழுத்து
  2. B. மெய்யெழுத்து
  3. C. ஆய்தம்
  4. D. உயிர்மெய்
7
"க" என்பது எந்த வகை எழுத்து?
  1. A. உயிரெழுத்து
  2. B. மெய்யெழுத்து
  3. C. ஆய்தம்
  4. D. உயிர்மெய்
8
"ஃ" என்பது எந்த வகை எழுத்து?
  1. A. உயிரெழுத்து
  2. B. மெய்யெழுத்து
  3. C. ஆய்தம்
  4. D. உயிர்மெய்
9
வல்லினத்திற்கான சரியான வரிசையைத் தேர்ந்தெடுங்கள்.
  1. A. ங், ஞ், ண், ந், ம், ன்
  2. B. ய, ர, ல, வ, ழ, ள
  3. C. க, ச, ட, த, ப, ற
  4. D. அ, ஆ, இ, ஈ, உ, ஊ
10
மெல்லினத்திற்கான சரியான வரிசையைத் தேர்ந்தெடுங்கள்.
  1. A. ங், ஞ், ண், ந், ம், ன்
  2. B. ய, ர, ல, வ, ழ, ள
  3. C. க, ச, ட, த, ப, ற
  4. D. அ, ஆ, இ, ஈ, உ, ஊ
11
இடையினத்திற்கான சரியான வரிசையைத் தேர்ந்தெடுங்கள்.
  1. A. ங், ஞ், ண், ந், ம், ன்
  2. B. ய, ர, ல, வ, ழ, ள
  3. C. க, ச, ட, த, ப, ற
  4. D. அ, ஆ, இ, ஈ, உ, ஊ
12
கீழ்க்கண்டவற்றில் எது குறில் எழுத்து?
  1. A. ஐ
  2. B. ஒ
  3. C. ஔ
  4. D. ஏ
13
கீழ்க்கண்டவற்றில் எது நெடில் எழுத்து?
  1. A. உ
  2. B. இ
  3. C. ஏ
  4. D. அ
14
"க் + உ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. கு
  2. B. கூ
  3. C. கெ
  4. D. கை
15
"ச் + ஆ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. சி
  2. B. சா
  3. C. சே
  4. D. சை
16
"ட் + ஈ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. டி
  2. B. டீ
  3. C. டெ
  4. D. டை
17
"ப் + ஊ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. பு
  2. B. பூ
  3. C. பெ
  4. D. பை
18
"ற் + ஒ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. று
  2. B. ரோ
  3. C. றொ
  4. D. றை
19
"ல் + ஐ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. லி
  2. B. லை
  3. C. லே
  4. D. லு
20
"வ் + ஏ" சேர்ந்தால் கிடைக்கும் எழுத்து எது?
  1. A. வி
  2. B. வே
  3. C. வை
  4. D. வு
21
பின்வரும் சொற்களில் எது எழுத்துக்களைப் பிரித்து எழுதப்பட வேண்டும்?
  1. A. மரம்இலை
  2. B. புத்தகம்
  3. C. வீடு
  4. D. சூரியன்
22
"வானம்" என்ற சொல்லை இணைத்து எழுதும்போது சரியான வடிவம் எது?
  1. A. வான ம
  2. B. வா னம்
  3. C. வானம்
  4. D. வா நம்
23
பின்வரும் சொற்களில் எது எழுத்துக்களை இணைக்கும்போது தவறாக உள்ளது?
  1. A. பூந் தோட்டம்
  2. B. காலைவணக்கம்
  3. C. மாலைநேரம்
  4. D. சூரியஒளி
24
"நிலா" + "நிறம்" இணைக்கும்போது சரியான வடிவம் எது?
  1. A. நிலாநிறம்
  2. B. நிலா நிறம்
  3. C. நி லாநிறம்
  4. D. நிலாநி றம்
25
கோடுகளை இணைப்பதற்கு எடுத்துக்காட்டு சொல் எது?
  1. A. பள்ளி
  2. B. ஆசிரியர்
  3. C. மாணவன்
  4. D. புத்தகப்பை
26
பின்வரும் பத்தியைப் படித்து, "கட்டுரைகள் எதை விளக்குகின்றன?" என்ற கேள்விக்கு பதிலளிக்கவும்: "கட்டுரைகள் ஒரு குறிப்பிட்ட தலைப்பை ஆழமாக விளக்குகின்றன."
  1. A. விளையாட்டு முடிவுகள்
  2. B. ஒரு குறிப்பிட்ட தலைப்பை ஆழமாக விளக்குதல்
  3. C. விளம்பரங்கள்
  4. D. வானிலை அறிக்கைகள்
27
பின்வரும் பத்தியைப் படித்து, "பத்திரிகைகள் மக்களுக்கு எவ்வாறு உதவுகின்றன?" என்ற கேள்விக்கு பதிலளிக்கவும்: "பத்திரிகைகள் செய்திகள், தகவல்கள் மற்றும் கருத்துக்களை வழங்குகின்றன."
  1. A. உணவு வழங்குதல்
  2. B. செய்திகள், தகவல்கள், கருத்துக்களை வழங்குதல்
  3. C. விளையாட்டு பயிற்சி
  4. D. மருத்துவ உதவி
28
பின்வரும் பழமொழியைப் படித்து, "கற்றது கை மண்ணளவு, கல்லாதது உலகளவு என்றால் என்ன பொருள்?" என்ற கேள்விக்கு பதிலளிக்கவும்: "கற்றது கை மண்ணளவு, கல்லாதது உலகளவு."
  1. A. கற்றல் முடிவில்லை
  2. B. பணம் முக்கியம்
  3. C. உடல் ஆரோக்கியம் அவசியம்
  4. D. நட்பு முக்கியம்
29
பின்வரும் பழமொழியைப் படித்து, "நல்லவன் நெடுங்காலம் வாழ்வான் என்றால் என்ன பொருள்?" என்ற கேள்விக்கு பதிலளிக்கவும்: "நல்லவன் நெடுங்காலம் வாழ்வான்."
  1. A. நல்லவர்கள் நீண்ட காலம் வாழ்வார்கள்
  2. B. தீயவர்கள் வெற்றி பெறுவார்கள்
  3. C. பணம் சேமிப்பது முக்கியம்
  4. D. உணவை வீணாக்காதே
30
பின்வரும் பழமொழியைப் படித்து, "காக்கை கரைந்தால் காக்கும் என்றால் என்ன பொருள்?" என்ற கேள்விக்கு பதிலளிக்கவும்: "காக்கை கரைந்தால் காக்கும்."
  1. A. காக்கை உணவைப் பகிரும்
  2. B. உறவினர்கள் உதவுவார்கள்
  3. C. மழை பெய்யும்
  4. D. பறவைகள் பறக்கும்

Botany

1
Plant viruses usually contain :
  1. A.RNA
  2. B.DNA
  3. C.DNA and RNA
  4. D.DNA or RNA
2
Viruses were discovered by :
  1. A.Stanley
  2. B.Ivanowski
  3. C.Twort
  4. D.Herelle
3
Which statement best defines viruses?
  1. A.Acellular infectious agents that replicate only inside living host cells
  2. B.Cellular microorganisms containing only DNA
  3. C.Free-living microorganisms capable of independent metabolism
  4. D.Cellular microorganisms containing only RNA
4
Which infectious agents consist essentially of small, naked RNA molecules without a protein coat?
  1. A.Virions
  2. B.Prions
  3. C.Viroids
  4. D.Bacteriophages
5
Coliphage f X 174 contains :
  1. A.double stranded RNA
  2. B.single stranded DNA
  3. C.double stranded DNA
  4. D.single stranded RNA
6
Viruses differ from living organisms in that, they :
  1. A.can grow inside a living host
  2. B.can multiply inside a living host
  3. C.can undergo mutation inside a living host
  4. D.are non-cellular
7
Virus which attacks E.coli is called :
  1. A.bacteriophage
  2. B.coliphage
  3. C.phytophage
  4. D.zoophage
8
Which characteristic distinguishes viruses from cellular organisms?
  1. A.They possess ribosomes for protein synthesis
  2. B.They have independent energy metabolism
  3. C.They are acellular and depend on host cells for replication
  4. D.They reproduce by binary fission
9
The genome of a temperate bacteriophage integrated into the bacterial chromosome is termed as?
  1. A.Prophage
  2. B.Episome
  3. C.Plasmid
  4. D.Capsomere
10
Virus was crystallized and isolated first by :
  1. A.J.D. Ivanowski
  2. B.F.C. Bawden
  3. C.W.M. Stanley
  4. D.K.M. Smith
11
Little leaf disease of brinjal is primarily associated with which pathogen?
  1. A.Phytoplasma
  2. B.Begomovirus
  3. C.Fungus
  4. D.Viroid
12
Which approximate size range includes many of the smallest known conventional virus particles?
  1. A.20–30 nm
  2. B.100–150 nm
  3. C.500–700 nm
  4. D.1–2 µm
13
Which of the following is devoid of protein coat, with a constitution of RNA only ?
  1. A.Tobacco mosaic virus
  2. B.Poxvirus
  3. C.Potato spindle tuber virus
  4. D.None of the above
14
Genetic modification brought about by a virus in a bacteria is known as :
  1. A.transformation
  2. B.transduction
  3. C.conjugation
  4. D.candidiasis
15
Which property makes the classification of viruses as strictly living or non-living problematic?
  1. A.They reproduce independently outside cells
  2. B.They possess cellular organelles but lack DNA
  3. C.They replicate in host cells but are metabolically inactive outside them
  4. D.They perform independent respiration outside host cells
16
Influenza viruses contain which type of genetic material?
  1. A.Double-stranded DNA
  2. B.Single-stranded RNA
  3. C.Single-stranded DNA
  4. D.Double-stranded RNA
17
Edward Jenner is best known for pioneering vaccination against which disease?
  1. A.Smallpox
  2. B.Chickenpox
  3. C.Rabies
  4. D.Poliomyelitis
18
Roux Sarcoma virus contains :
  1. A.RNA
  2. B.DNA
  3. C.DNA and RNA
  4. D.None of these
19
Which of the following is a viral disease of potato ?
  1. A.Early blight of potato
  2. B.Late blight of potato
  3. C.Leaf roll of potato
  4. D.None of the above
20
The term Virus' has been derived from a Latin word meaning :
  1. A.poison
  2. B.secretion
  3. C.cell
  4. D.venom
21
Which type of chemical bond is primarily responsible for the high boiling point of water in biological systems?
  1. A.Covalent bond
  2. B.Ionic bond
  3. C.Hydrogen bond
  4. D.Van der Waals bond
22
The bond dissociation energy of a C-H bond in methane is higher than that of a C-C bond in ethane due to:
  1. A.Higher electronegativity of hydrogen
  2. B.Shorter bond length of C-H
  3. C.Stronger Van der Waals forces
  4. D.Greater ionic character
23
In a peptide bond, the partial double-bond character arises due to:
  1. A.Hydrogen bonding with water
  2. B.Resonance between C=O and C-N bonds
  3. C.Hydrophobic interactions
  4. D.Electrostatic repulsion
24
Which interaction is least commonly involved in stabilizing the tertiary structure of a typical protein?
  1. A.Disulfide bond
  2. B.Coordinate covalent bond
  3. C.Hydrogen bond
  4. D.Hydrophobic interaction
25
The molecular geometry of a water molecule is bent due to:
  1. A.sp hybridization of oxygen
  2. B.Triple bond formation
  3. C.Lone pair repulsion on oxygen
  4. D.Ionic interactions
26
Which covalent linkage is hydrolyzed during the enzymatic digestion of polysaccharides?
  1. A.Peptide bond
  2. B.Phosphodiester bond
  3. C.Glycosidic bond
  4. D.Disulfide bond
27
The electronegativity difference between atoms in a peptide bond primarily affects:
  1. A.Bond length
  2. B.Bond polarity
  3. C.Bond angle
  4. D.Bond strength
28
In a typical glycerophospholipid, fatty acids are attached by ester bonds to?
  1. A.Glycerol
  2. B.Phosphate
  3. C.Choline
  4. D.Sphingosine
29
Which polysaccharide is a highly branched homopolymer of glucose containing α-1,4 linkages in its chains and α-1,6 linkages at branch points?
  1. A.Cellulose
  2. B.Glycogen
  3. C.Chitin
  4. D.Amylose
30
The primary structural feature distinguishing sphingolipids from glycerophospholipids is:
  1. A.Single fatty acid chain
  2. B.Absence of a phosphate group
  3. C.Presence of a glycerol backbone
  4. D.Presence of a sphingosine backbone
31
Which amino acid is least likely to be found in the core of a globular protein due to its hydrophilic nature?
  1. A.Arginine
  2. B.Valine
  3. C.Leucine
  4. D.Isoleucine
32
The primary function of the heme group in hemoglobin is:
  1. A.Electron transfer
  2. B.Structural stabilization
  3. C.Oxygen binding
  4. D.Hydrophobic core formation
33
Which nucleic acid component is responsible for the negative charge of DNA at physiological pH?
  1. A.Nitrogenous base
  2. B.Ribose sugar
  3. C.Deoxyribose sugar
  4. D.Phosphate group
34
Which structural feature distinguishes amylopectin from amylose?
  1. A.Amylopectin contains α-1,6 branch points
  2. B.Amylopectin is composed of fructose
  3. C.Amylose contains β-1,4 linkages
  4. D.Amylose contains chitin monomers
35
Which vitamin functions as a coenzyme in carboxylation reactions?
  1. A.Vitamin C
  2. B.Vitamin B7 (Biotin)
  3. C.Vitamin B12
  4. D.Vitamin D
36
Which interaction contributes importantly to stabilization of the collagen triple helix?
  1. A.Interchain hydrogen bonding
  2. B.β-sheet formation
  3. C.Phosphodiester bonding
  4. D.Glycosidic bonding
37
Which class of amphipathic lipids is a major structural component of biological membrane bilayers?
  1. A.Triacylglycerols
  2. B.Phospholipids
  3. C.Waxes
  4. D.Cholesteryl esters
38
Which biomolecule is primarily responsible for storing genetic information in eukaryotic cells?
  1. A.DNA
  2. B.RNA
  3. C.Protein
  4. D.Lipid
39
Which functional groups of amino acids participate directly in formation of a peptide bond?
  1. A.Two hydroxyl groups
  2. B.Amino and carboxyl groups
  3. C.Two amino groups
  4. D.Sulfhydryl and phosphate groups
40
Which carbohydrate is a major component of fungal cell walls?
  1. A.Chitin
  2. B.Cellulose
  3. C.Glycogen
  4. D.Starch
41
In plant photosystem I, phylloquinone (vitamin K1) primarily functions as an?
  1. A.Electron carrier
  2. B.Cell-wall component
  3. C.Light-harvesting chlorophyll
  4. D.Carbon-fixation enzyme
42
How does cholesterol primarily influence the physical properties of animal cell membranes?
  1. A.It buffers membrane fluidity across temperature changes
  2. B.It forms peptide cross-links between membrane proteins
  3. C.It hydrolyzes membrane phospholipids
  4. D.It produces ATP within the bilayer
43
Which interaction is primarily responsible for the hydrophobic effect in protein folding?
  1. A.Hydrogen bonding
  2. B.Van der Waals forces
  3. C.Entropy-driven exclusion of water
  4. D.Ionic bonding
44
The interaction between the side chains of lysine and glutamic acid in a protein is an example of:
  1. A.Hydrogen bond
  2. B.Hydrophobic interaction
  3. C.Electrostatic interaction
  4. D.Van der Waals force
45
Which interaction makes a major contribution to the stability of stacked adjacent bases within double-stranded DNA?
  1. A.Base-stacking interactions
  2. B.Disulfide bonding
  3. C.Peptide bonding
  4. D.Coordinate covalent bonding
46
The stability of a protein's alpha helix is primarily due to:
  1. A.Hydrophobic interactions
  2. B.Ionic bonds
  3. C.Disulfide bonds
  4. D.Hydrogen bonds between backbone atoms
47
Which interaction contributes most to the stability of lipid bilayers?
  1. A.Hydrogen bonding
  2. B.Covalent bonding
  3. C.Ionic bonding
  4. D.Hydrophobic interactions
48
The interaction between the aromatic rings of phenylalanine residues in a protein is an example of:
  1. A.Hydrogen bonding
  2. B.Pi-pi stacking
  3. C.Ionic interaction
  4. D.Disulfide bonding
49
Which stabilizing interaction is disrupted by high salt concentrations in a protein solution?
  1. A.Hydrophobic interaction
  2. B.Van der Waals force
  3. C.Hydrogen bonding
  4. D.Electrostatic interaction
50
Water molecules commonly interact with polar groups of biomolecules primarily through?
  1. A.Covalent bonds
  2. B.Hydrogen bonds
  3. C.Peptide bonds
  4. D.Disulfide bonds
51
Which interaction is most sensitive to changes in pH in a protein structure?
  1. A.Hydrophobic interaction
  2. B.Electrostatic interaction
  3. C.Hydrogen bonding
  4. D.Van der Waals force
52
Which combination commonly contributes to stabilization of protein quaternary structure?
  1. A.Hydrophobic interactions and hydrogen bonds
  2. B.Peptide bonds between every subunit
  3. C.Glycosidic linkages between subunits
  4. D.Phosphodiester bonds between subunits
53
The Henderson-Hasselbalch equation is used to calculate:
  1. A.Enzyme kinetics
  2. B.pH of a buffer solution
  3. C.Gibbs free energy
  4. D.Colligative properties
54
Which property of water helps dissolve ions by reducing electrostatic attraction between oppositely charged species?
  1. A.High dielectric constant
  2. B.Low polarity
  3. C.Low specific heat
  4. D.Low heat of vaporization
55
For a given first-order reaction, which factor commonly changes its rate constant?
  1. A.Initial reactant concentration
  2. B.Temperature
  3. C.Initial product concentration
  4. D.Amount of reactant already consumed
56
At constant temperature and pressure, what is the sign of ΔG for a spontaneous process proceeding in the forward direction?
  1. A.Positive
  2. B.Negative
  3. C.Always zero
  4. D.Undefined
57
Which colligative property is most relevant for determining the molecular weight of a protein in solution?
  1. A.Boiling point elevation
  2. B.Freezing point depression
  3. C.Osmotic pressure
  4. D.Vapor pressure lowering
58
The pKa of an amino acid’s carboxyl group is typically around:
  1. A.7.0
  2. B.2.0
  3. C.9.0
  4. D.12.0
59
According to the second law of thermodynamics, a spontaneous process results in?
  1. A.A decrease in total entropy of the universe
  2. B.An increase in total entropy of the universe
  3. C.Destruction of energy
  4. D.Constant entropy of both system and surroundings
60
For an enzyme obeying Michaelis-Menten kinetics, Km is equal to the substrate concentration at which the reaction velocity is?
  1. A.Vmax
  2. B.2Vmax
  3. C.Vmax/2
  4. D.Vmax/4
61
Plant-water relations primarily deal with:
  1. A.The movement and utilization of water in plants
  2. B.The synthesis of sugars
  3. C.The production of pigments
  4. D.The formation of cell walls
62
Water potential in plants is defined as:
  1. A.The amount of water in cells
  2. B.The kinetic energy of water
  3. C.The potential energy of water per unit volume
  4. D.The rate of water movement
63
The water potential of pure water at standard conditions is:
  1. A.Positive
  2. B.Zero
  3. C.Negative
  4. D.Variable
64
Water potential is influenced by:
  1. A.Solute potential and pressure potential
  2. B.Temperature only
  3. C.Light intensity
  4. D.Soil pH
65
Solute potential is also known as:
  1. A.Matric potential
  2. B.Turgor potential
  3. C.Osmotic potential
  4. D.Gravitational potential
66
Pressure potential in plant cells is due to:
  1. A.Turgor pressure against the cell wall
  2. B.Osmotic pressure only
  3. C.Gravitational force
  4. D.Light intensity
67
The movement of water in plants is driven by:
  1. A.Water potential gradient
  2. B.Temperature gradient
  3. C.Light gradient
  4. D.Nutrient gradient
68
Water moves from:
  1. A.Higher to lower water potential
  2. B.Lower to higher water potential
  3. C.Equal water potential
  4. D.No movement occurs
69
The main pathway for water uptake in roots is:
  1. A.Active transport
  2. B.Transpiration only
  3. C.Guttation
  4. D.Apoplast and symplast
70
The apoplast pathway involves water movement through:
  1. A.Cytoplasm of cells
  2. B.Cell walls and intercellular spaces
  3. C.Plasmodesmata
  4. D.Vacuoles
71
The symplast pathway involves water movement through:
  1. A.Xylem vessels
  2. B.Cell walls
  3. C.Intercellular spaces
  4. D.Cytoplasm and plasmodesmata
72
The Casparian strip in roots forces water to move through:
  1. A.The xylem directly
  2. B.The apoplast pathway
  3. C.The symplast pathway
  4. D.The phloem
73
Transpiration is the loss of water from plants in the form of:
  1. A.Liquid through phloem
  2. B.Liquid through roots
  3. C.Gas through xylem
  4. D.Water vapor through stomata
74
The main driving force for transpiration is:
  1. A.Capillary action
  2. B.Root pressure
  3. C.Evaporation from leaf surfaces
  4. D.Active transport
75
Stomata are primarily located on:
  1. A.Flowers
  2. B.Roots
  3. C.Stems
  4. D.Leaves
76
The opening and closing of stomata are regulated by:
  1. A.Xylem cells
  2. B.Epidermal cells
  3. C.Mesophyll cells
  4. D.Guard cells
77
Turgor pressure in guard cells is controlled by:
  1. A.Calcium ion movement
  2. B.Sodium ion movement
  3. C.Potassium ion movement
  4. D.Chloride ion movement
78
Wilting in plants occurs due to:
  1. A.Excess water uptake
  2. B.Loss of turgor pressure
  3. C.High solute potential
  4. D.Increased transpiration
79
Root pressure is responsible for:
  1. A.Osmosis
  2. B.Transpiration
  3. C.Guttation
  4. D.Diffusion
80
Guttation is the exudation of:
  1. A.Sap from xylem
  2. B.Water vapor from stomata
  3. C.Liquid water from hydathodes
  4. D.Sugars from phloem
81
The cohesion-tension theory explains:
  1. A.Water movement in xylem
  2. B.Sugar transport in phloem
  3. C.Nutrient uptake in roots
  4. D.Gas exchange in leaves
82
The cohesion-tension theory is driven by:
  1. A.Transpiration and cohesive properties of water
  2. B.Root pressure only
  3. C.Active transport
  4. D.Osmotic pressure only
83
Water molecules exhibit cohesion due to:
  1. A.Van der Waals forces
  2. B.Ionic bonding
  3. C.Covalent bonding
  4. D.Hydrogen bonding
84
The main tissue for water transport in plants is:
  1. A.Parenchyma
  2. B.Phloem
  3. C.Xylem
  4. D.Collenchyma
85
Xylem vessels are:
  1. A.Photosynthetic cells
  2. B.Living cells
  3. C.Dead, lignified cells
  4. D.Storage cells
86
The rate of transpiration is highest under:
  1. A.High humidity and low temperature
  2. B.Low humidity and high temperature
  3. C.High humidity and high temperature
  4. D.Low humidity and low temperature
87
The matric potential in plant-water relations is due to:
  1. A.Solute concentration
  2. B.Surface tension in cell walls
  3. C.Turgor pressure
  4. D.Gravitational force
88
Plasmolysis occurs when a plant cell is placed in:
  1. A.Hypertonic solution
  2. B.Hypotonic solution
  3. C.Isotonic solution
  4. D.Pure water
89
Incipient plasmolysis is the stage where:
  1. A.The cell membrane just begins to pull away from the cell wall
  2. B.The cell bursts
  3. C.The cell becomes fully turgid
  4. D.The cell dies
90
What is primarily responsible for maintaining turgidity in a plant cell?
  1. A.Outward diffusion of solutes
  2. B.Turgor pressure generated by water entry
  3. C.Loss of water from the vacuole
  4. D.Breakdown of the cell wall
91
The main source of water for plants is:
  1. A.Atmospheric water
  2. B.Rainwater
  3. C.Soil water
  4. D.Ground water
92
The water absorption by roots is primarily through:
  1. A.Xylem vessels
  2. B.Root hairs
  3. C.Phloem cells
  4. D.Epidermal cells
93
The process of water movement through the apoplast is:
  1. A.Active and selective
  2. B.Passive and non-selective
  3. C.Active and non-selective
  4. D.Passive and selective
94
The endodermis in roots acts as a:
  1. A.Barrier to water and solute movement
  2. B.Conduit for water
  3. C.Storage tissue
  4. D.Photosynthetic tissue
95
What is the water potential of a fully turgid plant cell when it is in equilibrium with pure water at standard conditions?
  1. A.Zero
  2. B.Always positive
  3. C.Highly negative
  4. D.Equal to its solute potential
96
Which two components are generally the major determinants of water potential in a typical plant cell?
  1. A.Solute potential and pressure potential
  2. B.Light potential and thermal potential
  3. C.Electrical potential and respiratory potential
  4. D.Pigment potential and metabolic potential
97
The xylem transport of water is:
  1. A.Passive and driven by transpiration pull
  2. B.Active and energy-dependent
  3. C.Driven by root pressure only
  4. D.Driven by solute concentration
98
The primary function of transpiration in plants is:
  1. A.Sugar transport
  2. B.Photosynthesis
  3. C.Cooling and nutrient transport
  4. D.Cell division
99
The antitranspirants are used to:
  1. A.Enhance photosynthesis
  2. B.Increase transpiration
  3. C.Reduce transpiration rate
  4. D.Promote guttation
100
Membrane transport in plants involves:
  1. A.DNA replication
  2. B.Synthesis of cell walls
  3. C.Photosynthetic reactions
  4. D.Movement of substances across cell membranes
Question for TN TRB Assistant Professor Botany 2026 - Quiz / Questions / MCQ - Toppersexam