Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
A simple pendulum performs simple harmonic motion about $x = 0$ with an amplitude $a$ and time period $T$. The speed of the pendulum at $x = rac{a}{2}$ will be:
What is false for GIFT?
A sequence of how many nucleotides in messenger RNA make a codon for an amino acid?
Select the correct option: Direction of RNA synthesis | Direction of reading of the template DNA strand
The decay constant of a radio isotope is $\lambda$. If $A_1$ and $A_2$ are its activities at times $t_1$ and $t_2$ respectively, the number of nuclei which have decayed during the time $(t_1 - t_2)$ is:
The incorrect statement among the following is:
During transcription, the DNA site at which RNA polymerase binds is called:
Expressed Sequence Tags (ESTs) refers to:
The activity of a radioactive sample is measured as $N_0$ counts per minute at $t=0$ and $N_0/e$ counts per minute at $t=5$ min. The time (in minute) at which the activity reduces to half its value is:
A radioisotope X with a half-life 1.4 × 10^9 yr decays into Y which is stable. A sample of the rock from a cave was found to contain X and Y in the ratio 1:7. The age of the rock is:
What is the role of RNA polymerase III in the process of transcription in Eukaryotes?
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
The mass of a ${}_{3}^{7}\mathrm{Li}$ nucleus is 0.042 u less than the sum of the masses of its nucleons. The binding energy per nucleon of ${}_{3}^{7}\mathrm{Li}$ nucleus is nearly:
Which one of the following equations of motion represents simple harmonic motion where $k$, $k_0$, $k_1$, and $a$ are all positive?
A particle is executing SHM along a straight line. Its velocities at distances $x_1$ and $x_2$ from the mean position are $v_1$ and $v_2$, respectively. Its time period is:
A person can see objects clearly only when they lie between 50 cm and 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be:
A radioactive nucleus ${}_{Z}^{A}\mathrm{X}$ undergoes spontaneous decay in the sequence ${}_{Z}\mathrm{X} \rightarrow {}_{Z-1}\mathrm{B} \rightarrow {}_{Z-3}\mathrm{C} \rightarrow {}_{Z-2}\mathrm{D}$, where $Z$ is the atomic number of element $\mathrm{X}$. The possible decay particles in the sequence are:
In the given figure, a diode D is connected to an external resistance $R = 100 \, \Omega$ and an e.m.f of $3.5\text{ V}$. If the barrier potential developed across the diode is $0.5\text{ V}$, the current in the circuit will be:
The unit of permittivity of free space $\varepsilon_0$ is
Henry/ohm can be expressed in: