List of top Questions asked in GAT-B- 2021

Match the components in List I with those in the List II.
List I: A. Down's Syndrome, B. Turner Syndrome, C. Phenylketonuria, D. Sickle cell anemia
List II: I. Autosomal recessive trait, II. Point mutation, III. Females only, IV. 21 Trisomy
Mendel's discovery in pea plants may be considered incidental since the chosen traits were
Height of a human being is a typical example of which mode of inheritance?
Choose the incorrect statement from the following.
A solid cylinder and a hollow cylinder of the equal radius and mass start rolling down (without slipping) on a fixed inclined plane from rest at the same time at the same height from the ground. Which of the following statements is correct?
Which among the following organs is NOT capable of secreting hormones?
The position of a particle moving along the X-axis as a function of time t (in seconds) is given by $X = t^{3}-9t + 2$. The magnitude of the acceleration of the particle at $t=3$ seconds is:
A radioactive material has a half life of 10 years. What fraction of radioactive nuclei will remain undecayed with respect to the initial sample after 20 years?
A metal ball weighs 50 g in air and 25 g when dipped in a liquid of density $1.25~g/cm^{3}.$ The metal ball weighs _____ when dipped in a liquid of density $1.2~g/cm^{3}$
A battery of emf 1.50 V and internal resistance 0.50 ohm supplies a current of 100 mA. The potential difference across the terminal of the battery will be:
A mass of 5 kg is moving along a circular path of radius 1 m. If the mass moves with 300 revolutions per minute, its kinetic energy would be:
Light waves entering a medium with higher refractive index undergo
Two inclined frictionless tracks, one gradual and the other steep meet at A from where two stones are allowed to slide down from rest, one on each track as shown in the figure below.
Which of the following statements is correct?
Assume that the earth is a perfect sphere. If the interior of the earth contained matter which is not of the same density everywhere, then the acceleration due to gravity on the surface of the earth will:
The equation describing acceleration (a) as a function of displacement (x) for four different particles is given below. Which one of these is executing simple harmonic motion?
A copper and a steel wire of the same diameter are connected end to end. A deforming force F is applied to this composite wire which causes a total elongation of 3 cm. The two wires will have
A vehicle travels half of the total distance (L) with speed $V_1$ and the other half with speed $V_2$, then its average speed over this whole distance is:
A far away object approaches a convergent lens from the left with a uniform speed of $5~m/s$ and stops at the focus. During this time the image on the right moves:
The half life of a chemical reaction is 1386 seconds. The specific rate constant for the reaction is:
Different structural information about glucose can be derived by reacting it with different reagents. Which of the following is correct?
A positive charge +q is located at the center of mass of a cube, sphere and cylinder. The total electric flux through the surface:
Electrical energy is transmitted over large distances at high alternating voltages because:
In ethanol, $C_{2}H_{5}OH$, there are covalent bonds, hydrogen bonds and van der Waals' forces. Which bonds or forces are broken when ethanol is vaporized?
Which of following reactions has a positive entropy change ($\Delta S^{\circ}$)?
The equation for the complete combustion of butane is:
$2C_{4}H_{10} + 13O_{2} \rightarrow 8CO_{2} + 10H_{2}O$
What is the amount (in mole) of carbon dioxide formed by the complete combustion of three moles of n-butane?