In a nucleus, the number of ribonucleotide triphosphates, is 10 times the number of deoxy ribonucleotide triphosphates, but only deoxy ribonucleotides are added during the DNA replication. Suggest a mechanism.

During in vitro synthesis of DNA, a researcher used 2'3' - dideoxy cytidine triphosphate as raw nucleotide in placeof 2'- deoxy cytidine. What would be the consequence?

A car accelerates uniformly from rest to a speed of 10 m/s in a time of 5 s. The number of revolutions made by one of its wheels during this motion if the radius of the wheel is 1//pi m.

The angular velocity of a wheel increases from 120 to 480 rpm in10 s.The number of revolutions made during this time is

Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse source is 2.5 xx 10^15 , calculate the energy of the source.

A current of 0.2 A passes through a metal wire for 20 seconds. Calculate the number of electrons passing through the cross section of the wire during this time. (The charge on an electron = 1.6 times 10^(-19) C)

A homopolymer has only one type of buildingblock called monomer repeated 'n'number of times. A heteropolymer has more than one type of monomer. Proteins are heteropolymers made of aminoacids. While a nucleic acid like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made of.

The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = 1.60 xx 10^(-19)C )

Solve the following examples (numerical problems): A current of 0.1 A passes through a copper wire for 40 seconds. Find the charge flowing through the cross section of the wire during this time and the number of electrons carrying it. (The charge on an electron, q= -1.6 times 10^(-19) C)

Calculate the energy radiated by the electron in the hydrogen atom during its transition from the fourth Bohr orbit to the first Bohr orbit. Hence determine frequency, wavelength and wave number of corresponding spectral line. Given: E_1= -13.6 eV, h = 6.6 xx 10^-34 J-s, c = 3 xx10^8 m//s . . .

Nuclear radius R has a dependemce on the mass number (A) as R=1.3 xx 10^-6 A^(1//3) m. For a nucleus of mass number A = 125. Obtain the order of magnitude of R expressed in metre.