List of top Plant Biotechnology Questions on Plant Biochemistry

Match List-I with List-II

List-I (Physiological activity action in cell) & List-II (Nutrient involved)
(A). Specific inhibitor of acid phosphatase & (I). Potassium
(B). Activation of $\alpha$-amylase activity & (II). Copper
(C). Constituent of ascorbic acid oxidase & (III). Molybdenum
(D). Accumulation of putrescine under nutrient deficiency & (IV). Chlorine

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Match List-I with List-II

List-I (Time of opening/closure of stomata) & List-II (Crop/plant examples)
(A). Stomata open throught the day and close during night & (I). Cabbage, Banana, Allium
(B). Stomata close for a few hours in the evening & (II). Amphibious plants: Emergent hydrophytes
(C). Stomata open for a few hours during the day & (III). Pea, Bean, Mustard
(D). Stomata remain open during day and night & (IV). Cereals

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Match List-I with List-II

List-I (Process Enzyme) & List-II (Location in the cell)
(A). Triacylglycerol synthesis & (I). Mitochondria
(B). Glycolate oxidase & (II). Plastids
(C). Hexose Monophosphate Shunt & (III). Endoplasmic reticulum
(D). Serine synthesis in photorespiration & (IV). Peroxisome

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Idetify the the crops with low "Light Compensation Point"
(A). Lettuce
(B). Soybean
(C). Betelvine
(D). Fingermillet
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Which of the following statements about mitochondria is wrong?
Which of the following molecules can be considered as a lipid?
(A). Ubiquinone
(B). Retinol
(C). Dolichol
(D). $\beta$-Carotene
Choose the correct answer from the options given below:
Rubisco activase is a (an)

(A). Catalytic chaperone
(B). ATP-dependant enzyme
(C). Enzyme that activates Rubisco by promoting the entry of sugar phosphates to its active site
(D). Enzyme that activates Rubisco by increasing its carbamylation

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The Dihomo-Gamma-Linolenic acid (DGLA, cis,cis,cis-8,11,14-eicosatrienoic acid) is:

(A). an $\omega$-6 fatty acid
(B). formed by conjugation of two linolenic acid molecules
(C). formed by elongation of $\gamma$-linolenic acid
(D). formed by isomerization of $\alpha$-linolenic acid

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Match List-I with List-II


List-I (Enzyme) & List-II (Post Translation modification for regulation)
(A). Nitrogenase & (I). Phosphorylation and 14:3:3 proteins
(B). Glutamine synthetase & (II). ADP-ribosylation
(C). Nitrate reductase & (III). Adenylylation
(D). Rubisco & (IV). S-Nitrosylation


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Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): The disruption of $\beta$-oxidation of fatty acids in plants can potentially reduce stress-induced ROS accumulation and improve its stress tolerance.
Reason (R): In plants, $\beta$-oxidation of fatty acids takes place predominantly in peroxisomes, where first enzyme of $\beta$-oxidation viz. fatty acyl CoA oxidase produces large amounts of hydrogen peroxide.

In light of the above statements, choose the correct answer from the options given below.
Identify the crop plants with "Albuminous" seeds:
(A). Castor, Cashew, Coconut
(B). Cucumber, Tamarind, Groundnut
(C). Sunflower, Tomato, Papaya
(D). Mustard, Redgram, Pea
Choose the correct answer from the options given below:
An appropriate statistical tool used to compare the differences among three or more than three groups is:
Given below are two statements:
Statement (I): As per "Harrington thumb rules" (ISTA rules), Viability of seeds depends on storage conditions where a) For each 1% decrease in seed moisture content, the storage life of the seeds is doubled; b) For each $10^{\circ}\text{F}$ ($5.6^{\circ}\text{C}$) decrease in seed storage temperature, the storage life of seed is doubled.
Statement (II): The arithmetic sum of storage temperature in $^{\circ}\text{F}$ and the % relative humidity should not exceed 100, with no more than half the sum contributed by the temperature.
In light of the above statements, choose the most appropriate answer from the options given below.
Occurrence of "Indole Acetoldoxime Pathway" of auxin biosynthesis is characteristic to the members of this family:
Based on Distribution and Arrangement of STOMATA in leaves, Match List-I with List-II:
Choose the correct answer from the options given below:
The nutrient element essential for the synthesis of chlorophyll precursor in the biosynthesis of chlorophyll molecule:
In trees at a height of 75 meters, the magnitude of gravitational component of water potential in leaves is:
Which of the following cellular structure is found only in a plant cells?

(1). Glyoxysomes
(2). Vacuoles
(3). Lysosomes
(4). Cytoskeleton
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A) : In the secondary structure of proteins, the parallel \(\beta\)-pleated sheets are less stable than antiparallel \(\beta\)-pleated sheets.
Reason (R) : The hydrogen bonds of parallel \(\beta\)-pleated sheets are distorted in comparison to those of antiparallel \(\beta\)-pleated sheets.
In light of the above statements, choose the correct answer from the options given below:
When two phosphatidyl glycerol moieties join with each other with the elimination of one glycerol molecule, the resulting phospholipid formed is:
Which of the following enzymes contain an unusual amino acid viz. selenocysteine, at its active site?
Fructans are polymers of fructose built upon which one of the following starter units?
Match List-I with List-II
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Match List-I with List-II
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The decreasing order of the numerical values of Molar Extinction Coefficient of following amino acids at 280 nm is:
(A). Cysteine
(B). Phenylalanine
(C). Tyrosine
(D). Tryptophan
Choose the correct answer from the options given below: