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Match the following genes of the lac operon with their respective products:
Two pendulums of length $121 \text{ cm}$ and $100 \text{ cm}$ start vibrating in phase. At some instant, the two are at their mean position in the same phase. The minimum number of vibrations of the shorter pendulum after which the two are again in phase at the mean position is:
Pick the wrong statement in the context with a rainbow.
A rod of length $10\text{ cm}$ lies along the principal axis of a concave mirror of focal length $10\text{ cm}$ in such a way that its end closer to the pole is $20\text{ cm}$ away from the mirror. The length of the image is:
DNA replication in bacteria occurs:
A small coin is resting on the bottom of a beaker filled with a liquid. A ray of light from the coin travels up, to the surface of the liquid and moves along its surface (see figure). How fast is the light traveling in the liquid?
If the critical angle for total internal reflection from a medium to vacuum is $45^{\circ}$, the velocity of light in the medium is:
In a three-dimensional view, the molecule of t-RNA is:
Purines found both in DNA and RNA are:
Which form of RNA has a structure resembling clover leaf?
Which one of the following statements about Histones is wrong?
A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness $3 \text{ cm}$ and a refractive index $1.5$ is placed over the mark. How should the microscope be moved to get the mark in focus again?
A ray of light is incident at an angle of incidence, $i$, on one face of a prism of angle $A$ (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is $\mu$, the angle of incidence $i$, is nearly equal to:
After about how many years of the formation of the earth, life appeared on this planet?
Genetic Drift occurs due to :
Ernst Haeckel's embryological support for evolution was disapproved by:
For a normal eye, the cornea of eye provides a converging power of $40\text{ D}$ and the least converging power of the eye lens behind the cornea is $20\text{ D}$. Using this information, the distance between the retina and the cornea-eye lens can be estimated to be:
Initiation codon in eukaryotes is:
A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
Three blocks with masses $m$, $2m$, and $3m$ are connected by strings as shown in the figure. After an upward force $F$ is applied on block $m$, the masses move upward at constant speed $v$. What is the net force on the block of mass $2m$? ($g$ is the acceleration due to gravity)