List of top Questions asked in NEET (UG)- 2005

In a set of reactions, acetic acid yielded a product D.
CH3COOH \(\xrightarrow[]{SOCl_2}\) A \(\xrightarrow[Anhyd.AlCl_3]{Benzene}\) B \(\xrightarrow[]{HCN}\) C \(\xrightarrow[]{HOH}\) D
The structure of D would be:
The rate of reaction between two reactants A and B decreases by a factor of 4,if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is:
Three crops that contribute maximum to global food grain production are :
Genes for cytoplasmic male sterility in plants are generally located in
Match items in column-I with those in column-II.
 Column-I Column-II
APeritrichous flagellation1Ginkgo
BLiving fossil2Macrocystes
CRhizophore3Escherichia coli
DSmallest flowering plant4Selaginella
ELargest perennial alga5Wolffia

Select the correct answer from the following : Codes :

The name of Norman Borlaug is associated with :
In which one pair both the plants can be vegetatively propagated by leaf pieces ?
More than 70% of world's freshwater is contained in :
Which one of the following characters is not typical of the class-Mammalia ?
Auxospores and hormocysts are formed, respectively, by :
At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium ?
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:
Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?
The ability of the Venus flytrap to capture insects is due to:
Which one of the following experiments suggests that simplest living organisms could not have originated spontaneously from non-living matter ?
Ectophloic siphonostele is found in:
E.coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because :
Through which cell of the embryo sac, does the pollen tube enter the embryo sac ?
An acromion process is characteristically found in the :
Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of :
Production of a human protein in bacteria by genetic engineering is possible because :
From the following statements select the wrong one
Which of the following is the simplest amino acid
All of the following statements concerning the actinomycetes filamentous soil bacterium Frankia are correct except that Frankia :
Parkinson's disease(characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter: