95% of the cytoplasm ofred blood cells is the
1.Antibodies
2.Haemoglobin
3.Enzymes
4.Proteins
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
Active transport is dependent on
1.Photosynthesis
2.Respiration
3.Photophosporylation
4.Photophosporylation
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
All plants do not possess
1.Lenticels
2.Cuticle
3.Stomata
4.All of these
Breaking of terminal phosphate of ATP releases about _____ Kcal of energy.
1.6.1
2.6.3
3.7.1
4.7.3
Cellular respiration is essentially a/an _________ process.
1.Oxidation
2.Reduction.
3.Redox.
4.None of the above.
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
Cuticular transpiration is ______ of total transpiration
1.6-8%
2.5-7%
3.7-9%
4.4-6%
Cytoplasmic strands that extend through pores in adjacent cell walls are known as
1.Pseudopods
2.Symplasts
3.Plasmodesmata
4.Pili
Exceptionally the positive hydrostatic pressure generated by root pressure is about
1.600 Kpa
2.800 Kpa
3.1000 Kpa
4.900 Kpa
Final acceptor of electrons in respiratory chain is
1.NADH
2.Cytochrome a3
3.Water
4.Oxygen
In plants, water potential is determined by major factors.
1.Three
2.Four
3.Two
4.Five
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
It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood.
1.35%
2.45%
3.55%
4.75%
Lenticels look like
1.A big pore
2.Stoma
3.Sponge
4.Cars or small protusions
Lenticular transpiration is _________ of total transpiration
1.2-3%
2.1-3%
3.1-4%
4.1-2%
Low level of CO2 favours _____ of the stomata
1.Opening
2.Closure
3.Both of these
4.None of these
Open circulatory system can contain
1.Red Blood Cells
2.White Blood Cells
3.Haemoglobin
4.All of these
Pressure flow theory was proposed by
1.H-Van Mohl
2.Dixon
3.Vander wall.
4.Earnst Munch
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
QRS complex represents
1.Atrial systole
2.Ventricular systole
3.Atrial diastole
4.Ventricular diastole
Single circuit heart is found in
1.Fishes
2.Amphibians
3.Reptiles
4.Mammals
Solute potential is always
1.plus ve
2.? ve
3.plus ve or ? ve
4.Zero
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
Stomatal transpiration is _____ of total transpiration
1.90%
2.91%
3.93%
4.95%
Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
1.Bacteria
2.Viruses
3.Fungi
4.Cyanobacteria
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
The membrane of vacuoles is known as
1.Vacuoloplast
2.Tonoplast
3.Tanoplast
4.All of these
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
The opening and closing of stomata is directly controlled by the
1.Temperature
2.pH
3.Light
4.None of these
The pressure generated when water enters & inflates plant cells is called ______ potential
1.Water
2.Osmotic
3.Pressure
4.Solute
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
The uptake of water in plants involves
1.Active transport
2.Passive transport
3.Both of these
4.None of these
There are _______ hypothesis which may explain opening and closing of stomata
1.One
2.Two
3.Three
4.Four
There are _______ types of nutrients needed by plants besides light to carry out photosynthesis
1.Two
2.Three
3.Four
4.Five
They function as multisensory hydraulic valve
1.Lenticels
2.Guard cells
3.Hydathods
4.All of these
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.
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
Which of the following are proteins in nature?
1.Antibodies
2.Interferons
3.Antitoxins
4.All of these
Which of the following have thickest walls?
1.Arteries
2.Veins
3.Capillaries
4.None of these
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.
_______ component of cell wall has grreat affinity with water.
1.Lignin
2.Cellulose
3.Pectin
4.All of these
_______ give rise to macrophages, which destroy larger particles by phagocytosis.
1.Nautrophils
2.Basophila
3.Monocyte
4.Lymphocyte
_______ 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