List of top Questions asked in NEET (UG)

Two bodies of mass $4\,kg$ and $6\,kg$ are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :

Match the following with respect to meiosis: 

a	Zygotene	i	Terminalization
b	Pachytene	ii	Chiasmata
c	Diplotene	iii	Crossing over
d	Diakinesis	iv	Synapsis

Select the correct option from the following:

The energy required to break one bond in DNA is $10^{-20}J $. This value in eV is nearly

The half-life for a zero order reaction having $0.02\, M$ initial concentration of reactant is $100\, s$. The rate constant (in $mol \,L^{-1} s^{-1})$ for the reaction is

The rate constant for a first order reaction is $4.606 \times 10^{-3} s^{-1}$. The time required to reduce $2.0\,g$ of the reactant to $0.2\,g$ is :

The total energy of an electron in the $n^{th}$ stationary orbit of the hydrogen atom can be obtained by

The transverse section of a plant shows following anatomical features: 
(a) Large number of scattered vascular bundles surrounded by bundle sheath. 
(b) Large conspicuous parenchymatous ground tissue. 
(c) Vascular bundles conjoint and closed. 
(d) Phloem parenchyma absent. 
Identify the category of plant and its part

Identify the wrong statement with reference to immunity.

The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are :

In gel electrophoresis, separated DNA fragments can be visualized with the help of :

The specific palindromic sequence which is recognized by EcoRI is:

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

Match the following concerning essential elements and their functions in plants:

a	Iron	i	Photolysis of water
b	Zinc	ii	Pollen germination
c	Boron	iii	Required for chlorophyll biosynthesis
d	Manganese	iv	IAA biosynthesis

Match the following :

a	Inhibitor of catalytic activity	i	Ricin
b	Possess peptide bonds	ii	Malonate
c	Cell wall material in fungi	iii	Chitin
d	Secondary metabolite	iv	Collagen

Which of the following statements is not correct?

Match the following columns and select the correct option.

	Column I		Column II
a	6- 15 pairs of gill slits	i	Trygon
b	Heterocercal  caudal fin	ii	Cyclostomes
c	Air Bladder	iii	Chondrichthyes
d	Poison sting	iv	Osteichthyes

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their :

Identify the correct statement with reference to human digestive system.

Match the following columns and select the correct option.

Column I		Column II
A	Clostridium	I	Cyclosporin-A
B	Trichoderma	II	Butyric Acid
C	Monascus	III	Butyric Acid
D	Aspergillus niger	IV	Blood cholesterol lowering agent

Presence of which of the following conditions in urine are indicative of Diabetes Mellitus ? (1) Uremia and Ketonuria (2) Uremia and Renal Calculi (3) Ketonuria and Glycosuria (4) Renal calculi and Hyperglycaemia

Select the option including all sexually transmitted diseases.

Which of the following hormone levels will cause release of ovum (ovulation) from the graffian топсІе

Match the following with respect to meiosis:

	Column I		Column II
A	Bt cotton	I	Gene therapy
B	Adenosine	II	Cellular defence deaminase deficiency
C	RNAi	III	Detection of HIV infection
D	PCR	IV	Bacillus thuringiensis

Montreal protocol was signed in 1987 for control of:

Which of the following is correct about viroids?