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The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are:
The plant hormone used to destroy weeds in a field
Which is the basis of genetic mapping of the human genome as well as DNA fingerprinting?
In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the:
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence called:
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is $20 \text{ m/s}^2$ at a distance of $5 \text{ m}$ from the mean position. The time period of oscillation is:
During simple harmonic motion of a body, the energy at the extreme position is:
Choose the correct pair from the following :
Which of the following organisms are known as chief producers in the oceans?
Number of base pairs in human chromosomes are:
A radioactive nucleus ${}_Z^A X$ undergoes spontaneous decay in the sequence ${}_Z^A X \to {}_{Z-1} B \to {}_{Z-3} C \to {}_{Z-2} D$, where $Z$ is the atomic number of element $X$. The possible decay particles in the sequence are
The period of oscillation of a mass $M$ suspended from a spring of negligible mass is $T$. If along with it another mass $M$ is also suspended, the period of oscillation will now be:
The refracting angle of a prism is $A$, and refractive index of the material of the prism is $\cot(A/2)$. The angle of minimum deviation is:
Given below are two statements: Statement I: In the lac operon, the z gene codes beta-galactosidase which is primarily responsible for the hydrolysis of lactose into galactose and glucose. Statement II: In addition to lactose, glucose or galactose can also induce lac operon. In the light of the above statements choose the correct answer from the options given below:
Complete the flow chart on central dogma:
Given below are two statements: Statement I: The process of copying genetic information from one strand of the DNA into RNA is termed as transcription. Statement II: A transcription unit in DNA is defined primarily by the three regions in the DNA i.e. a promoter, the structural gene and a terminator. In the light of the above statements, choose the correct answer from the options given below:
A plank with a box on it at one end is gradually raised about the other end. As the angle of inclination with the horizontal reaches $30^\circ$, the box starts to slip and slides $4.0 \text{ m}$ down the plank in $4.0 \text{ s}$. The coefficients of static and kinetic friction between the box and the plank will be, respectively:
The refractive index of the material of a prism is $\sqrt{2}$ and the angle of the prism is $30^\circ$. One of the two refracting surfaces of the prism is made a mirror inwards with a silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if the angle of incidence on the prism is:
Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage?
Semiconservative replication of DNA was first demonstrated in: