S Tejaswini asked • 20 minutes ago

Let W_{1} and W_{2} be subspaces of the real vector space defined by

W_{1} = {(x_{1,}x_{2}, ...,x_{100}) : x_{i} = 0 if i is divisible by 4},

W_{2} = { (x_{1};x_{2}, ....x_{100}) : x_{i} = 0 if i is divisible by 5}.

Then the dimension of W_{1} ∩ W_{2} is ____

W

W

Then the dimension of W

Correct answer is between '60,60'. Can you explain this answer?

Debajyoti Banerjee asked • 34 minutes ago

Flower is a modified shoot or a branch. Which one of the following DOES NOT provide evidence in support of the above statement?

- a)Axis nature of the thalamus
- b)Leaf- like arrangement of the floral members
- c)Homology of floral and vegetative buds
- d)Occurrence of mitosis in the floral tissues

Correct answer is option 'D'. Can you explain this answer?

Anand Prajapati asked • 1 hour ago

A 1 W point source at origin emits light uniformly in all the directions. If the units for both the axes are measured in centimetre, then the Poynting vector at the point (1,1,0) in W/cm^{2} is are unit vectors in Cartesian − coordinate system. )

- a)
- b)
- c)
- d)

Correct answer is option 'A'. Can you explain this answer?

Yukta Mahashabde asked • 1 hour ago

The minimum light intensity that the human eye can perceive is 10^{-10} Wm^{-2}. The area of the opening of our eye (the pupil) is approximately 4 cm^{-2}. Consider yellow light with wavelength λ = 600 nm. The number of photons incident on the retina per second at the minimum intensity for the eye to respond is

- a)1.5 × 10
^{3} - b)5 × 10
^{3} - c)8 × 10
^{3} - d)1.2 × 10
^{4}

Correct answer is option 'D'. Can you explain this answer?

Preetha Dilip asked • 1 hour ago

The standard oxidation potentials for oxidation of NADH and H_{2}O are + 0.315 V and – 0.815 V, respectively. The standard free energy for oxidation of 1 mole of NADH by oxygen under standard conditions (correct to 1 decimal place) is _______ kJ. [Faraday Constant is 96500 C mole^{–1}]

Correct answer is between '-219.0,-217.0'. Can you explain this answer?

Sakil Ahmed asked • 1 hour ago

Males of a fish species react to other males of their species intruding into their territories with a characteristic headstand display. In an experiment, a male fish in an aquarium was shown a mirror, which provoked the headstand display. Non- reflective objects of the same shape and size, and water from other aquaria housing male fish of the same species in similar physiological condition failed to evoke a response. This experiment shows that

- a)Visual cues are not sufficient to evoke the headstand response
- b)Visual cues are sufficient to evoke the headstand response
- c)Chemical cues are sufficient to evoke the headstand response
- d)Chemical cues are not sufficient to evoke the headstand response

Correct answer is option 'B,D'. Can you explain this answer?

Semina Pradhan asked • 2 hours ago

Two molecules of a protein associate to form a homodimer. Let S be the combined translational and rotational entropies of one monomer.

The combined translational and rotational entropies of the homodimer will be

The combined translational and rotational entropies of the homodimer will be

- a)2×S
- b)S
- c)Marginally more than 2×S
- d)Marginally more than S

Correct answer is option 'D'. Can you explain this answer?

Lovely Dixit asked • 2 hours ago

Kriahna Kant asked • 2 hours ago

Two mammalian cell lines with doubling times of 12 h and 36 h were cultured with radioactive thymidine for 8 h. The cells were further cultured without the radioactive thymidine for 72 h. Incorporated radioactivity was measured in equal number of cells in each culture, which revealed that

- a)both the cell lines had the same amount of radioactivity
- b)the fast growing cells had more radioactivity
- c)the slow growing cells had more radioactivity
- d)neither of the cells had any radioactivity

Correct answer is option 'C'. Can you explain this answer?

Ram Ram asked • 2 hours ago

A small spherical ball having charge q and mass m, is tied to a thin massless nonconducting string of length l. The other end of the string is fixed to an infinitely extended thin non-conducting sheet with uniform surface charge density σ . Under equilibrium, the string makes an angle 45° with the sheet as shown in the figure. Then σ is given by (g is the acceleration due to gravity and ε_{0 }is the permittivity of free space)

- a)
- b)
- c)
- d)

Correct answer is option 'C'. Can you explain this answer?

Semina Pradhan asked • 3 hours ago

Which one of the following statements on ‘cro repressor’ and ‘immunity repressor’ of lambda phage is NOT correct?

- a)Both bestow immunity to externally infecting phage
- b)Both inhibit phage gene expression and help in the integration into host genome
- c)The production and maintenance of the lysogenic state is due to the antagonism of two repressors
- d)Upon infection by lambda phage, cro gene is transcribed resulting in the synthesis of a protein repressor that inhibits the synthesis of immunity repressor

Correct answer is option 'B'. Can you explain this answer?

B P S asked • 4 hours ago

With respect to periodic properties, the CORRECT statement is

- a)Electron affinity order is F > O > Cl
- b)First ionisation energy order is Al > Mg > K
- c)Atomic radius order is N > P > As
- d)Ionic radius order is K
^{+}> Ca^{2+}> Mg^{2+}

Correct answer is option 'D'. Can you explain this answer?

Reeti Padhan asked • 4 hours ago

Which of the following statement(s) is(are) TRUE?

- a)There exists a connected set in R which is not compact
- b)Arbitrary union of closed intervals in R need not be compact
- c)Arbitrary union of closed intervals in R is always closed
- d)Every bounded infinite subset R of R has a limit point in V itself

Correct answer is option 'A,B'. Can you explain this answer?

Ankita Dubey asked • 5 hours ago

Aluminium (Al) can occur in both tetrahedral and octahedral co- ordinations in silicates. The amount of octahedral Al in a pyroxene crystal of composition MG_{1.4} Fe_{0.4} Al_{0.4} Si_{1.8} O_{6} is ____ (give answer in one decimal place).

Correct answer is '0.2'. Can you explain this answer?

Rachika Soni asked • 5 hours ago

The plane of polarisation of a plane polarized light rotates by 60^{° }after passing through a waveplate. The pass-axis of the wave plate is at an angle α with respect to the plane of polarisation of theincident light. The wave plate and α are

- a)λ/4, 60
^{°} - b)λ/2, 30
^{°} - c)λ/2, 120
^{°} - d)λ/4, 30
^{°}

Correct answer is option 'B'. Can you explain this answer?

Rachika Soni asked • 5 hours ago

Two beams of light in the visible range (400 nm - 700 nm) interfere with each other at a point. The optical path difference between them is 5000 nm. Which of the following wavelengths will interfere constructively at the given point?

- a)416.67 nm
- b)555.55 nm
- c)625 nm
- d)666.66 nm

Correct answer is option 'A,B,C'. Can you explain this answer?

Aniket Choudhary asked • 6 hours ago

A nozzle is in the shape of a truncated cone, as shown in the figure. The area at the wide end is 25 cm^{2} and the narrow end has an area of 1 cm^{2}. Water enters the wider end at a rate of 500 gm/sec. The height of the nozzle is 50 cm and it is kept vertical with the wider end at the bottom. The magnitude of the pressure difference in kPa (1 kPa = 10^{3} N/m^{2}) between the two ends of the nozzle is _______________.

Correct answer is '17.5'. Can you explain this answer?

Manohar Lal Jat asked • 6 hours ago

Which of the following statement(s) is/are true?

- a)Newton’s laws of motion and Maxwell’s equations are both invariant under Lorentz transformations.
- b)Newton’s laws of motion and Maxwell’s equations are both invariant under Galilean transformations.
- c)Newton’s laws of motion are invariant under Galilean transformations and Maxwell’s equations are invariant under Lorentz transformations.
- d)Newton’s laws of motion are invariant under Lorentz transformations and Maxwell’s equations are invariant under Galilean transformations.

Correct answer is option 'C'. Can you explain this answer?

Pawan Solanki asked • 7 hours ago

2,4-Dinitrophenol (DNP) is an uncoupler that

- a)cannot freely pass through plasma membrane
- b)enhances ATP production
- c)is a non-toxic compound at high dose
- d)makes the inner mitochondrial membrane leaky to protons

Correct answer is option 'D'. Can you explain this answer?

Prem Mehrotra asked • 7 hours ago

A reaction follows second order rate law,

- a)A plot of [A] versus t is a straight line
- b)A plot of 1/[A] versus t is a straight line
- c)A plot of ln[A] versus t is a straight line
- d)A plot of e
^{[A]}versus t is a straight line

Correct answer is option 'B'. Can you explain this answer?

Yukta Mahashabde asked • 8 hours ago

An enzyme requires both aspartate (pKa of side chain = 4.5) and histidine (pKa of side chain = 6.5) residues in the catalytic site to be protonated for activity. The expected enzyme activity (in %) at a pH of 5.5 would be closed to

- a)90
- b)78
- c)50
- d)10

Correct answer is option 'D'. Can you explain this answer?

Esha Kumari asked • 8 hours ago

Viral capsids are made up of morphological subunits called capsomeres. One of the common capsomeres is icosahedral. The icosahedron is a regular polyhedron with

- a)16 triangular facets and 12 vertices.
- b)20 triangular facets and 12 vertices.
- c)16 triangular facets and 16 vertices.
- d)20 triangular facets and 16 vertices.

Correct answer is option 'B'. Can you explain this answer?

Jyota Mishr asked • 8 hours ago

Calculate the liquid function potential at 25°C between two solutions of HCl having mean ionic activities of 0.01 and 0.001, respectively. The transference number of H^{ } ion (f_{t}) in HCl may be taken as 0.83.

- a)0.0061
- b)0.0039
- c)0.0010
- d)0.0090

Correct answer is option 'B'. Can you explain this answer?

Csphk Pre asked • 9 hours ago

Out of the following statements, choose the correct option(s) about a perfect conductor.

- a)The conductor has an equipotential surface
- b)Net charge, if any, resides only on the surface of conductor
- c)Electric field cannot exist inside the conductor
- d)Just outside the conductor, the electric field is always perpendicular to its surface

Correct answer is option 'A,B,C,D'. Can you explain this answer?

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