In terms of descending order of percentage proportions of leucocytes in human blood, which one is correct?

Agranulocytes formed in spleen and lymph nodes are non-granular white blood cells that contain non-lobulated nuclei. These from about 35% of total leucocytes $\left( {3.5{\rm{\;}} \times {{10}^9}{\rm{\;per\;litre}}} \right).$ These are of two types-monocytes and lymphocytes.

The correct Option is "Neutrophils → lymphocytes → monocytes → eosinophils → basophils"

Neutrophils → basophils → lymphocytes → eosinophils → monocytes

Neutrophils → monocytes → lymphocytes → eosinophils → basophils

Neutrophils → eosinophils → basophils → lymphocytes → monocytes

Which one is correct?

All phyla from Porifera to Echinodermata, including phylum-Arthropoda are non-chordates, i.e., lacking notochord

Notochord is ectodermal in origin present in some animals

Notochord is a mesodermally derived rod like structure formed on the dorsal side in embryonic development in some animals

The correct Option is "Both (b) and (c)"

Which one is correct regarding the number of teeth and dental formula with reference to a child of age between 4 to 6 years?

Dentition in human is diphyodont, heterodont and teeth are arranged in socket of jaw bone, i.e., thecodont. Diphyodont means that teeth appears in two set during their life. A set of milky or temporary or deciduous teeth, which are replaced by permanent teeth between 6-12 of age. These milky teeth in human child includes 8 incisors, 4 canines and 8 molars (PM are absent). So, the dental formula of a child between the age of 4-6 years is ${\rm{I}}\frac{2}{2}{\rm{\;C}}\frac{1}{1}{\rm{\;PM}}\frac{0}{0}{\rm{\;M}}\frac{2}{2} \times 2 = 20$

The correct Option is "$\frac{{2102}}{{2012}} \times 2 = 20$"

$\frac{{212}}{{213}} \times 2 = 24$

$\frac{{2123}}{{2123}} \times 2 =32 $

$\frac{{2103}}{{2003}} \times 2 = 22$

Which one is correct about the physiology of eye?

The intraocular pressure is about 10-15 mm Hg (~α kPa). The pupils constrict when the eye focuses on a near object. The aqueous humour is secreted by the ciliary bodies and differs in composition from the plasma.

The pressure within the eye (the intraocular pressure) is about 1.5 mm Hg (0.2 kPa)

The correct Option is "When light is shone in one eye both pupils constrict"

The pupils dilate when the eye is focused on a near object

The aqueous humour is an ultrafiltrate of plasma

Which one is correct regarding the ear and hearing?

If air conduction and bone conduction showed a similar degree of hearing loss, the subject would have sensorineural hearing loss. The ear is most sensitive to frequencies between 1 kHz and 3 kHz. The endolymph is not an ultrafiltrate of plasma but is rich in potassium and low in sodium.

The correct Option is "The range of human hearing is from 20 Hz to 20 kHz"

Conductive hearing loss would be evident if a person had a similar degree of hearing loss for air conduction and bone conduction

The ear is most sensitive to frequencies between about 100 Hz and 300 Hz

The endolymph of the scala media is similar in composition to plasma

Which one is correct for ${C_4} - $ plants? Mesophyll Bundle Sheath

In ${C_4} - $ plants, the PEP case is present in mesophyll cells (${C_4} - $ cycle) and RuBisCo is present bundle sheath cells (${C_3} - $cycle)

The correct Option is "PEPcase ${C_4} - $ cycle RuBisCo ${C_3}$-cycle"

PEPcase Calvin cycle RuBisCo ${C_4} - $ cycle

RuBisCo ${C_4} - $ cycle PEPcase ${C_3} - $ cycleV

RuBisCo ${C_2} - $ cycle PEPcase ${C_3} - $ cyce

Which one is correct sequence in glycolysis?

The correct sequence in glycolysis is Glucose-6-phosphate $ \to $ 3-phosphoglyceraldehyde Phosphoenol $ \to $ 3-phosphoglyceric acid $ \to $ Pyruvate $ \to $ Pyruvic acid.

G-6-P→PEP → 3-PGAL → 3-PGA

The correct Option is "G-6-P→3-PGAL → 3-PGA → PEP"

G-6-P→PEP → 3-PGA → 3-PGAL

G-6-P→3-PGA →3-PGAL → PEP

Which one is correct?

${{\rm{O}}_2}$ has two unpaired electrons.

The correct Option is "Dioxygen is paramagnetic"

Which one is correct?

Zn is above iron in electrochemical series.

Ni displaces zinc from its solution

The correct Option is "Zn displaces iron from its solution"

Ag displaces copper from its solution

Cu displaces nickel from its solution

Which one is correct representation for, $2{\rm{S}}{{\rm{O}}_3}\;\leftrightharpoons2{\rm{S}}{{\rm{O}}_2} + {{\rm{O}}_2}?$

Follow law of mass action equations.

${K_p} = \frac{{{{\left( {{p_{{\rm{S}}{{\rm{O}}_2}}}} \right)}^2}\left( {{p_{{{\rm{O}}_2}}}} \right)}}{{{{\left( {{p_{{\rm{S}}{{\rm{O}}_3}}}} \right)}^2}}}$

${K_c} = \frac{{{{\left[ {{\rm{S}}{{\rm{O}}_2}} \right]}^2}\left[ {{{\rm{O}}_2}} \right]}}{{{{\left[ {{\rm{S}}{{\rm{O}}_3}} \right]}^2}}}$

${K_p} = \frac{{{{\left( {{\rm{mole }}\;{\rm{of}}\;{\rm{S}}{{\rm{O}}_2}} \right)}^2} \times \left( {{\rm{mole}}\;{\rm{ of}}\;{{\rm{O}}_2}} \right)}}{{{{\left( {{\rm{mole }}\;{\rm{of}}\;{\rm{S}}{{\rm{O}}_3}} \right)}^2}}} \times \left[ {\frac{P}{{{\rm{total mole }}\;{\rm{at}}\;{\rm{ equilibrium}}}}} \right]$

The correct Option is "All of the above"

Which one is correct relation :

$\Delta G = \Delta H - T\Delta S,\Delta G = - nEF$ and $\Delta G = \Delta H + T{\left[ {\frac{{\partial \left( {\Delta G} \right)}}{{\partial T}}} \right]_P}$ ∴ $\Delta H = - nF\left[ {E - T{{\left( {\frac{{\partial E}}{{\partial T}}} \right)}_P}} \right]$ ∴ $\Delta S = nF{\left( {\frac{{\partial E}}{{\partial T}}} \right)_P}$

The correct Option is "$\Delta S = {\left( {\frac{{\partial E}}{{\partial T}}} \right)_P} \times nF$"

${\left( {\frac{{\partial E}}{{\partial T}}} \right)_P} = \frac{{\Delta G - \Delta H}}{T}$

${\left( {\frac{{\partial E}}{{\partial T}}} \right)_P} = \frac{{\partial \left( {\Delta S} \right)}}{{\partial T}}$

$ - \Delta S = {\left( {\frac{{\partial E}}{{\partial T}}} \right)_P} \times nF$

Which one is correct about conductivity water?

These are characteristic of conductivity water.

The water whose own conductance is very small

The water obtained after 7-8 times distillation

Kohlrausch prepared the conductivity water for the first time

The correct Option is "All of the above"

Which one is correct for the given change?

These are facts about addition reaction.

The product formed is trans-2-methyl-1-cyclopentanol

The correct Option is "All of the above"

Which one is correct?

In the molarity and normality the volume of the solution is considered while in molality the mass of the solvent is considered. Molarity and normality change with temperature because of expansion of contraction of the liquid with temperature. However, molality does not change with temperature because mass of the solvent does not change with temperature.

Molality changes with temperature.

The correct Option is "Molality does not change with temperature."

Molarity does not change with temperature.

Normality does not change with temperature.

Which one is correct statement?

Orthophosphoric acid $\left( {{{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_4}} \right)$ is a tribasic acid because it has three replaceable hydrogen atoms. Hence the basicity of ${{{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_3}}$ is 3. While phosphorous acid $\left( {{{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_4}} \right)$ dibasic acid because it has two replaceable hydrogen atoms. Hence the basicity of ${{{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_3}}$ is 2 . Its structure is as

Basicity of ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{4}}}$ and ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{3}}}$ is 3 and 3 respectively

Acidiity of ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{4}}}$ and ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{3}}}$ is 3 and 3 respectively

Acidity of ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{4}}}$ and ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{3}}}$ is 3 and 2 respectively

The correct Option is "Basicity of ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{4}}}$ and ${{\rm{H}}_{\rm{3}}}{\rm{P}}{{\rm{O}}_{\rm{3}}}$ is 3 and 2 respectively"

Optic nerve leave the eye and retinal blood vessel enter it. The optic nerves leave the eye and the retinal blood vessels enter it at a point medial to and slightly above the posterior pole of the eyeball. Photoreceptor cells are not present in that region and hence it is called blind spot. At the posterior pole of the eye, lateral to the blind spot there is a yellowish pigmented spot called macula lutea with a central pit called the fovea. The fovea is a thinned-out portion of the retina where only the cones are densely packed. It is the point where the visual acuity (resolution) is the greatest

The correct Option is "Optic nerves leave the eye and retinal blood vessels enter it"

Retinal blood vessels leave the eye and optic nerves enter it

There is no involvement of optic nerves at all

There is no involvement of retinal blood vessels at all

Transport of electrolytes through loop of Henle takes place by

Active and passive both are the ways to transport electrolyte through loop of Henle

The correct Option is "Both (a) and (b)"

Choose the correct statements w.r.t. chordates.

Some chordates possess post-anal tail in adult stage.

All chordates possess notochord in adult as well as in embryonic stage

In all chordates, the dorsal hollow nerve chord is replaced by brain and spinal cord

Heart is ventral in all chordates without any exception

The correct Option is "Post anal tail is present in adult stage also, in some chordates"

Volume of air breathed in and out, while at rest is called

Tidal volume is the volume of air inspired or expired or expired with each normal breath. This is about 500 mL in adult person.

The correct Option is "Tidal volume"

…A… is composed of endoderm inside and splanchonopleuric extraembryonic mesoderm outside. In humans it is small and non-functional except for …B… to placenta. A and B in the statement refers to

Extraembryonic or Foetal Membranes The growing embryo/foetus develops four membranes called the extraembryoic or foetal membranes. These include chorion, aminion, allantois and yolk sac (i) Chorion It is made up of trophoblast outside and somatopleuric extraembryonic mesoderm inside. It completely surrounds the embryo and protects it. It also takes part in the formation of placenta (ii) Amnion It is composed of trophoblast inside and somatopleuric extraembryonic mesoderm outside. The space between the embryo and the amnion is called the amniotic cavity, which is filled with a clear, watery fluid secreted by both the embryo and the membrane. The amniotic fluid prevents dessication of the embryo and acts as a protective cushion that absorbs shocks (iii) Allantois The allantois is composed of endoderm inside and splanchnopleuric extraembryoic mesoderm outside. It is a sac like structure, which arises from the gut of the embryo near the yolk sac. In human the allantois is small and non-functional except for furnishing blood vessels to the placenta (iv) Yolk Sac The primary yolk sac consists of endoderm inside and splanchnopleuric extraembryoic mesoderm outside. The yolk sac is non-functional in human beings except that it functions as the site of early blood cell formation

The correct Option is "A-Allantois; B-blood vessel"

The Question is from Zoology Breathing and exchange of gases Transport of gases, and it was created by the author Mr. BALACHANDRA.N

The correct Option is "A-104; B-40"

The excretory material of bony fish is

The excretory material of bony fishes like Hippocampus is ammonia. So, bony fishes are ammonotelic.

The correct Option is "Ammonia"

Statements about the mechanism of muscle contraction are given below. I. Acetylcholine is released when the neural signal reaches the motor end plate. II. Muscle contraction is initiated by a signal sent by CNS via a sensory neuron. III. During muscle contraction isotropic band gets elongated. IV. Repeated activation of the muscles can lead to lactic acid accumulation. Identify the correct statement.

The junction between a motor neuron and the sarcolemma of the muscle fiber is called the neuromuscular junction or motor-end plate. A neural signal reaching this junction (motor-end plate) releases a neurotransmitter (acetylcholine) which generates an action potential in the sarcolemma.