List of top Plant Biotechnology Questions

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : The addition of fluoride to fermenting yeast extracts causes the buildup of 3-phosphoglycerate and 2-phosphoglycerate.
Reason (R) : The fluoride strongly inhibits the enolase enzyme in the presence of inorganic phosphate ($\text{P}_i$) by forming a tightly bound complex with the $\text{Mg}^{2+}$ at the enzymes's active site.
In light of the above statements, choose the correct answer from the options given below.
During glycolysis, the enzyme phosphoglycerate mutase catalyses the conversion of 3-phosphoglycerate (3PG) to 2-phosphoglycerate (2PG) through formation of 2,3-bisphosphoglycerate (2,3-BPG) intermediate. The phosphoryl group to 3PG for the formation of 2,3-BPG is transferred from which of the followings:
Match List-I with List-II

List-I (Coenzyme/Prosthetic group of PDH) & List-II (Location on Multienzyme Complex)
(A) Nicotinamide adenine dinucleotide & (I) Bound to Dihydrolipoyl dehydrogenase (E3)
(B) Lipoic acid & (II) Covalently linked to a Lysine on E2
(C) Coenzyme A & (III) Substrate for E2
(D) Flavin adenine dinucleotide (FAD) & (IV) Substrate for E3
The number of stereoisomers for n-carbon aldoses and ketoses respectively are:
Match List-I with List-II

List-I (Molecule) & List-II (Type of peptide)
(A) Aspartame & (I) Tripeptide
(B) Glutathione & (II) Tetrapeptide
(C) Oxytocin & (III) Nonapeptide
(D) Endomorphin & (IV) Dipeptide
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : Depsipeptides have more flexible structure and lower rotational barrier for cis-trans isomerization than their native analogs.
Reason (R) : One or more amide linkages in depsipeptides are replaced with corresponding ester groups leading to their reduced hydrogen bonding capacity, which in turn results in deformed secondary structures.
In light of the above statements, choose the correct answer from the options given below.
Match List-I with List-II

List-I (Reaction catalyzed/Name of the enzyme) & List-II (Class of enzyme)
(A) Formation and removal of carbon-carbon double bonds & (I) Ligase
(B) Amino acyl $-$ tRNA synthetase & (II) Hydrolase
(C) Transamination & (III) Lyase
(D) Removal of fatty acids from triglycerides & (IV) Transferase
The Old Yellow Enzyme (OYE), isolated by Warburg and Christian from brewers' bottom yeast in 1932, has been shown to comprise of a colourless apoprotein and a yellow cofactor. Subsequent identification of the nature of this yellow cofactor demonstrated that OYE is a(an):
Nucleosome- a fundamental unit of chromatin- contains a nucleosome core, which is composed of 146 bp (approx.) of DNA wrapped around histone octamer having which of the following composition?
Match List I with List II

List I (Name of the Fatty Acid) & List II (Type of the fatty acid)
(A) Oleic acid & (I) $\omega$-3
(B) Petroselenic acid & (II) $\omega$-6
(C) Gamma linolenic acid & (III) $\omega$-12
(D) Eicosapentaenoic acid & (IV) $\omega$-9
The following are found translocated abundantly in phloem:
A. Aminoacids
B. Sucrose
C. Phosphorus
D. Potassium
Choose the correct answer from the options given below: [Question ID = 719][Question Description = 219_34_PLB_AUG22_Q119]
Identify the "Growth Retardants" used in crop plants:
A. Maleic Hydrazide
B. Chloromequat Chloride
C. Paclobutrazole
D. Triiodobenzoic acid
Choose the correct answer from the options given below: [Question ID = 720][Question Description = 220_34_PLB_AUG22_Q120]
Most widely used chemicals for sugarcane ripening:
A. Ethrel
B. GA
C. Salicylic acid
D. Glyphosate
Choose the correct answer from the options given below: [Question ID = 715][Question Description = 215_34_PLB_AUG22_Q115]
Examples of "Climacteric fruits":
A. Banana
B. Grape
C. Tomato
D. Mango
Choose the correct answer from the options given below: [Question ID = 717][Question Description = 217_34_PLB_AUG22_Q117]
Identify "Recalcitrant seeds":
A. Mungbean
B. Rubber
C. Tea
D. Wheat
Choose the correct answer from the options given below: [Question ID = 716][Question Description = 216_34_PLB_AUG22_Q116]
Match List I with List II
List I (Nutrient Element)
A. Calcium
B. Zinc
C. Sulphur
D. Magnesium
List II (Physiological function)
I. Constituent of superoxide dismutase
II. Activation of RuBP carboxylase
III. Synthesis of chlorophyll precursor
IV. Constituent of glutathione
V. Structural component of chromosomes
Choose the correct answer from the options given below:
Match List I with List II
List I (Type of senescence)
A. Overall senescence
B. Progressive senescence
C. Top senescence
D. Deciduous senescence
List II (Example)
I. Sugarbeet
II. Gulmohar
III. Lemna
IV. Wheat
V. Tobacco
Choose the correct answer from the options given below:
The compound discovered as natural trigger for the metabolic explosion that raises the temperature of thermogenic inflorescence of Arum lillie is: [Question ID = 718][Question Description = 218_34_PLB_AUG22_Q118]
Short term treatment for about 16-20 hours, given to cut flowers with high concentration of sucrose, \(AgNO_3\), Benzyl Adenine etc to increase the shelf-life is called: [Question ID = 712][Question Description = 212_34_PLB_AUG22_Q112]
Phytochrome is localised within: [Question ID = 709][Question Description = 209_34_PLB_AUG22_Q109]
In acid soils at pH < 5, the element that becomes available in toxic amounts is: [Question ID = 708][Question Description = 208_34_PLB_AUG22_Q108]
The essential co-factor in water-oxidizing process at PS II in the light reactions of photosynthesis: [Question ID = 707][Question Description = 207_34_PLB_AUG22_Q107]
Bakane disease in rice is associated with discovery of this plant hormone: [Question ID = 710][Question Description = 210_34_PLB_AUG22_Q110]
When tissue culture medium contains both auxin and kinetin in the ratio of 10:1, the pith cells of tobacco grow and form callus. Further,
Statement I: If the ratio of auxin to cytokinin is less in the medium, a number of roots are initiated from callus
Statement II: If the ratio is more (less cytokinin than auxin), a number of shoot buds are initiated.
In light of the above statements, choose the most appropriate answer from the options given below: [Question ID = 711][Question Description = 211_34_PLB_AUG22_Q111]
Given below are two statements:
Statement I: Methyl viologen, also known as Paraquat, used as herbicide inhibits light reactions of photosynthesis.
Statement II: Paraquat blocks electron flow at plastoquinone acceptors of PS II by competing for binding sites of plastoquinone.
In light of the above statements, choose the most appropriate answer from the options given below: [Question ID = 706][Question Description = 206_34_PLB_AUG22_Q106]