In C4 plants, initial carbon dioxide fixation occurs in chloroplasts of
A. Palisade tissue
B. Spongy parenchyma
C. Guard cells
D. Hypodermis and chlorenchyma
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Passage of minerals from topsoil to subsoil through seepage of water is known as
A. Leaching
B. Percolation
C. Conduction
D. Transpiration
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Plants exchange water with environment through structures by two cells
A. Hydathodes
B. Lenticells
C. Stomata
D. All of these
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CAN is a/an
A. Nitrate fertiliser
B. Ammonium fertiliser
C. Both A and B
D. None of these
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Organelles involved in photorespiration are
A. Mitochondria, chloroplasts and ribosomes
B. Mitochondria peroxisomes and chloroplasts
C. Mitochondria, nucleus and ribosomes
D. Mitochondria, peroxisomes and glyoxysomes
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In sugarcane, 14 CO2 is fixed in malic acid. The enzyme is
A. RuBP carboxylase
B. PEP carboxylase
C. Ribulose phosphate kinase
D. Fructose phosphatase
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Which strategy involves exclusion of pathogen?
A. Certification
B. Inspection
C. Quarantine
D. All of these
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Which of these is not an inorganic fungicide?
A. Sulphur
B. Mercury
C. Copper
D. Oxanthiin
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Cell wall of Chytridimycetes class of fungi is composed of
A. Peptidoglycon
B. Cellulose
C. Glucans + Cellulose
D. Glucan + Chitin
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The symptoms of powdery mildew of pea (caused by Erysiphe polygoni) first appears on
A. Stem
B. Roots
C. Leaves
D. Flowers
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Nitrogen fertilisation is applied for growth, but its excess
A. hastens maturity
B. delays maturity
C. improves colour
D. improves quality
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What is true for photosynthesis?
A. Both carbon dioxide and water are oxidised
B. Both carbon dioxide and water are reduced
C. Carbon dioxide is oxidised and water reduced
D. Carbon dioxide is reduced and water oxidised
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Which of the following plant cells will show totipotency?
A. Seive tubes
B. Xylem vessels
C. Meristem
D. Cork cells
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Select the correct match for the following
1. Net ATP produced in glycolysis
2. Positive Benedict's test
3. Genes unable to express in presence of their alleles
4. A character controlled by many genes
A. 36, glucose, recessive, polygenic
B. 8, glucose, recessive, polygenic
C. 32, sucrose, recessive, polygenic
D. 8, fructose, dominat, polygenic
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Which is not associated with ascent of sap in tall
A. Continuity of water column
B. Transpiration pull
C. Pressure of tracheary elements
D. Cohesion and adhesion of water molecules
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The cauliflower mosaic virus particles contain
A. DNA
B. RNA
C. Both A and B
D. Either A or B
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In glycolysis ultimately (or end product of glycolysis) is
A. Protein is converted into glucose
B. Glucose is converted into glycogen
C. Starch is converted into glucose
D. Glucose is converted into pyruvic acid
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Number of amino acid in TMV is
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In double fertilization, male gamete and secondary nucleus form
A. Endosperm
B. Gamete
C. Embryo
D. Egg
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Essential macronutrients are
A. Produced by growth hormones
B. Absorbed from soil
C. Produced by enzymes
D. Manufactured during photosynthesis
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