List of top Questions asked in NEET (UG)- 2021

Match List - I with List - II.

List - 1		List - 1
a	Lenticels	i	Phellogen
b	Cork cambium	ii	Suberin deposition
c	Secondary cortex	iii	Exchange of gases
d	Cork	iv	Phelioderm

Choose the correct answer from the options given below.

For a plane electromagnetic wave propagating in $x$-direction, which one of the following combination gives the correct possible directions for electric field (E) and magnetic field (B) respectively?

Which of the following is an incorrect statement ?

In spite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

During the process of gene amplification using PCR, if very high temperature is not maintained in the beginning, then which of the following steps of PCR will be affected first?

The compound which shows metamerism is :

Which of the following statements is incorrect?

Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature ?

Gemmae are present in:

In a potentiometer circuit a cell of EMF $1.5\, V$ gives balance point at $36\, cm$ length of wire. If another cell of EMF $2.5\, V$ replaces the first cell, then at what length of the wire, the balance point occurs ?

Amensalism can be represented as:

Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities. Match Column - I and Column - II with appropriate relations.

Column I		Column II
A	Drift Velocity	P	$\frac{ m }{ ne ^{2} \rho}$
B	Electrical Resistivity	Q	$ne v_{ d }$
C	Relaxation Period	R	$\frac{ e E }{ m } \tau$
D	Current Density	S	$\frac{ E }{ J }$

Statement I : The codon 'AUG' codes for methionine and phenylalanine. Statement II : 'AAA' and 'AAG' both codons code for the amino acid lysine. In the light of the above statements, choose the correct answer from the options given below.

Succus entericus is referred to as :

Which of the following stages of meiosis involves division of centromere?

An organic compound contains $78 \%$ (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is: [Atomic wt. of $C$ is $12, H$ is $1$]

The escape velocity from the Earth's surface is $v$. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is :

Gemmae are present in:

A convex lens ‘A’ of focal length 20 cm and a concave lens ‘B’ of focal length 5 cm are kept along the same axis with a distance ‘d’ between them. If a parallel beam of light falling on ‘A’ leaves ‘B’ as a parallel beam, then the distance ‘d’ in cm will be

The electron concentration in an n-type semiconductor is the same as the hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them

For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y?

The centriole undergoes duplication during

The structures of beryllium chloride in solid state and vapor phase, are

For a reaction A$\rightarrow$B, the enthalpy of the reaction is −4.2 kJ mol⁻¹ and the enthalpy of activation is 9.6 kJ mol⁻¹. The correct potential energy profile for the reaction is shown in option

Column I		Column II
A	Drift Velocity	P	\(\frac{ m }{ ne ^{2} \rho}\)
B	Electrical Resistivity	Q	\(ne v_{ d }\)
C	Relaxation Period	R	\(\frac{ e E }{ m } \tau\)
D	Current Density	S	\(\frac{ E }{ J }\)