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Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage ($G_0$). This process occurs at the end of
Calcium is important in skeletal muscle contraction because it
The non-essential amino acid among the following is:
The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of helium atom would be:
One end of the string of length $l$ is connected to a particle of mass $m$ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed $v$, the net force on the particle (directed towards the centre) will be: ($T$ represents the tension in the string)
Newton's second law gives the measure of:
Consider aiming a beam of free electrons towards free protons. When they scatter, an electron and a proton cannot combine to produce a H-atom,
Which of the following would help in prevention of diuresis?
The voltage reading on the voltmeter V in the circuit shown below will be:
The colour code of resistance is given below: The values of resistance and tolerance, respectively are:
The variation of EMF with time for four types of generators is shown in the figures. Which amongst them can be called AC voltage?
A series R-C circuit is connected to an alternating voltage source. Consider two situations: 1. When the capacitor is air-filled. 2. When the capacitor is mica filled. If the current through the resistor is $I$ and voltage across the capacitor is $V$, then:
When gene targeting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as:
Match the organism with its use in biotechnology. List I (a) Bacillus thuringiensis (b) Thermus aquaticus (c) Agrobacterium tumefaciens (d) Salmonella typhimurium List II (i) Cloning vector (ii) Construction of first rDNA molecule (iii) DNA polymerase (iv) Cry proteins
The Balmer series for the H-atom can be observed: (a) if we measure the frequencies of light emitted when an excited atom falls to the ground state (b) if we measure the frequencies of light emitted due to transitions between excited states and the first excited state (c) in any transition in a H-atom (d) as a sequence of frequencies with the higher frequencies getting closely packed
In an AC circuit the emf (e) and the current (i) at any instant are given respectively by e = E₀ sin ωt, i = I₀ sin(ωt - ϕ). The average power in the circuit over one cycle of AC is
In an electrical circuit R, L, C, and an AC voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is π/3. If instead, C is removed from the circuit, the phase difference is again π/3. The power factor of the circuit is:
Power dissipated in an L-C-R series circuit connected to an AC source of emf ε is
An inductor 20 mH, a capacitor 50 μF, and a resistor 40 Ω are connected in series across a source of emf V = 10 sin 340t. The power loss in the AC circuit is:
The pair of electrons in the given carbanion, $\text{CH}_3\text{C}\equiv\text{C}^-$, is present in which of the following orbitals?