_______ component of cell wall has grreat affinity with water.
1.Lignin
2.Cellulose
3.Pectin
4.All of these
Posted Date:-2021-09-08 21:07:47
_______ give rise to macrophages, which destroy larger particles by phagocytosis.
1.Nautrophils
2.Basophila
3.Monocyte
4.Lymphocyte
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_______ potential is the measure of the change in water potential of a system due to the presence of solute molecules.
1.Osmotic
2.Pressure
3.Both of these
4.None of these
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95% of the cytoplasm ofred blood cells is the
1.Antibodies
2.Haemoglobin
3.Enzymes
4.Proteins
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A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called
1.Transpiration pull
2.Root pressure
3.Osmotic pressure.
4.None of these
Posted Date:-2021-09-08 21:07:47
Active transport is dependent on
1.Photosynthesis
2.Respiration
3.Photophosporylation
4.Photophosporylation
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Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are
1.Hydathods
2.Stomata
3.Lenticels
4.None of these
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All plants do not possess
1.Lenticels
2.Cuticle
3.Stomata
4.All of these
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Breaking of terminal phosphate of ATP releases about _____ Kcal of energy.
1.6.1
2.6.3
3.7.1
4.7.3
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Cellular respiration is essentially a/an _________ process.
1.Oxidation
2.Reduction.
3.Redox.
4.None of the above.
Posted Date:-2021-09-08 21:07:47
Commonly in other plants than tall ones the speed of upward movement of water is
1.8mh-1
2.1 mh-1
3.7 mh-1
4.4 mh-1
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Cuticular transpiration is ______ of total transpiration
1.6-8%
2.5-7%
3.7-9%
4.4-6%
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Cytoplasmic strands that extend through pores in adjacent cell walls are known as
1.Pseudopods
2.Symplasts
3.Plasmodesmata
4.Pili
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Exceptionally the positive hydrostatic pressure generated by root pressure is about
1.600 Kpa
2.800 Kpa
3.1000 Kpa
4.900 Kpa
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Final acceptor of electrons in respiratory chain is
1.NADH
2.Cytochrome a3
3.Water
4.Oxygen
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In plants, water potential is determined by major factors.
1.Three
2.Four
3.Two
4.Five
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In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.
1.Tonoplast
2.Apoplast
3.Symplast
4.Vacuolar
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It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood.
1.35%
2.45%
3.55%
4.75%
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Lenticels look like
1.A big pore
2.Stoma
3.Sponge
4.Cars or small protusions
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Lenticular transpiration is _________ of total transpiration
1.2-3%
2.1-3%
3.1-4%
4.1-2%
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Low level of CO2 favours _____ of the stomata
1.Opening
2.Closure
3.Both of these
4.None of these
Posted Date:-2021-09-08 21:07:47
Open circulatory system can contain
1.Red Blood Cells
2.White Blood Cells
3.Haemoglobin
4.All of these
Posted Date:-2021-09-08 21:07:47
Pressure flow theory was proposed by
1.H-Van Mohl
2.Dixon
3.Vander wall.
4.Earnst Munch
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Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called
1.Transpiration pull
2.Root pressure
3.Ascent of sap.
4.All of these
Posted Date:-2021-09-08 21:07:47
QRS complex represents
1.Atrial systole
2.Ventricular systole
3.Atrial diastole
4.Ventricular diastole
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Single circuit heart is found in
1.Fishes
2.Amphibians
3.Reptiles
4.Mammals
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Solute potential is always
1.plus ve
2.? ve
3.plus ve or ? ve
4.Zero
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Stomata open due to _____ of K+ into the guard cells from the surrounding epidermis
1.Diffusion
2.Active transport
3.Osmosis
4.All of these
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Stomatal transpiration is _____ of total transpiration
1.90%
2.91%
3.93%
4.95%
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Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
1.Bacteria
2.Viruses
3.Fungi
4.Cyanobacteria
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The diffusion of ions along with water also takes place by mass flow system along the ______ path
1.Tonoplast
2.Apoplast
3.Symplast
4.Vacuolar
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The membrane of vacuoles is known as
1.Vacuoloplast
2.Tonoplast
3.Tanoplast
4.All of these
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The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)
1.Deffusion
2.Osmosis
3.Active transport
4.None of these
Posted Date:-2021-09-08 21:07:47
The opening and closing of stomata is directly controlled by the
1.Temperature
2.pH
3.Light
4.None of these
Posted Date:-2021-09-08 21:07:47
The pressure generated when water enters & inflates plant cells is called ______ potential
1.Water
2.Osmotic
3.Pressure
4.Solute
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The site/s where most of the uptake of water and minerals take place is/are
1.Root hairs
2.Root cells
3.Underground stem
4.All of these
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The uptake of water in plants involves
1.Active transport
2.Passive transport
3.Both of these
4.None of these
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There are _______ hypothesis which may explain opening and closing of stomata
1.One
2.Two
3.Three
4.Four
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There are _______ types of nutrients needed by plants besides light to carry out photosynthesis
1.Two
2.Three
3.Four
4.Five
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They function as multisensory hydraulic valve
1.Lenticels
2.Guard cells
3.Hydathods
4.All of these
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Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called:
1.Diffusion
2.Facilitated diffusion.
3.Passive transport.
4.Active transport.
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Tricuspid valve is present
1.Between right atrium and right ventricle
2.Between left atrium and left ventricle
3.At base of pulmonary artery
4.At base of aorta
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Which of the following are proteins in nature?
1.Antibodies
2.Interferons
3.Antitoxins
4.All of these
Posted Date:-2021-09-08 21:07:47
Which of the following have thickest walls?
1.Arteries
2.Veins
3.Capillaries
4.None of these
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Which of the following is true about hearts of earthworm?
1.There are 5-7 pairs of heart.
2.They are present between 1-7th segments.
3.They are present lateral to the oesophagus.
4.They pump blood from ventral to dorsal vessel.
Posted Date:-2021-09-08 21:07:47