Monthly Mock Test (February 29) - NEET MCQ

Here, V_0​=283V,R=3Ω,L=25×10⁻³H
C=400μF=4×10⁻⁴F
Maximum power is dissipated at resonance, for which 
 
ν=1/[2π√(LC)]​​= (1×7​)/[2×22(25×10⁻³×4×10⁻⁴)]
=(7×10^3​)/(44√10​)
=50.3Hz

A 1,3-diketo compound forms more stable enol than a monocarbonyls. Also ester group forms less stable enol than carbonyls. Hence, III, a 1 , 3-diketo ne form s highest enol content while I (monocarbonyl) forms least enol content at equilibrium.

Alpha-1-antitrysin gene is used to treat emphysema disease. This disease causes breakdown of alveoli cell and reducing the surface area for exchange of gases.

The voltage can be written as,
V=5[sinωt+(π/2​)]
The angle between the voltage and the current is 90∘.
The power dissipated in the circuit is given as,
P=V_rms​I_rms​cosϕ
=V_rms​I_rms​cos90o
=0
Thus, the power dissipated in the circuit is 0.
 

Impedance= V_ac/I_ac​ ​​=100V/0.5A ​=200Ω
R= V_dc​​/I_dc ​ =100/1​=100Ω
Lω =√ (impedance²−R²​)=√(200²−100²​)=173.2
L=173.2/ ω​= 173.2/2π50​=0.55H
 

Explanation:The induced electromotive force in any closed circuit is equal to the negative of the time rate of change of the magnetic flux enclosed by the circuit.

Two peptide chains A and B in insulin are linked via sulphur to form a disulphide linkage or disulphide bridge.

The cry1Ac gene in Bt Brinjal is under the transcriptional control of an enhanced cauliflower mosaic virus 35S (CaMV35S) promoter, which ensures the gene is expressed in all the Brinjal tissue throughout its complete life-cycle.

In the absence of any special stability factor, a hydrate of ketone is highly unstable.

The seeds of golden rice are yellow in colour due to presence of provitamin A in entire gene. This rice is natural source of vitamin A along with starch and proteins.

l = 1 m

= 314V

Cry gene produce toxin protein that chocks the gut of insects in presence of alkaline pH to cause death of insects. It is not effective against rodents.

Acetal is form ed by cyclisation

e = NBAω = NBA²πn = 8 x 0.5 x 0.09 x 2 x 3.14 x 60 = 136V

Cry gene produce protein crystals in the insects gut as alkaline medium renders it insoluble and the activated toxin binds to surface of midgut epithelial cells and creates pores that cause cell swelling and death of the insect.

Bacillus thuringiensis bacterium forms protein crystals during particular phase of growth. The crystal of toxic protein has insecticidal protein. This protein get activated in alkaline medium in the gut of insects and kills them.

Genetically modified (GM) Arabidopsis produces double stranded RNA to knock out specific parasitic genes in the nematode that harms the crops by silencing specific mRNA of nematodes.

The above exchange occur due to existence of hydrate equilibrium.

Hereditary diseases are due to defects in gene. Gene can be corrected at embryonic stage by gene therapy technique in which genes are inserted into person cells or tissue to take over the function of defective gene.

Explanation:Flux will be changed due to this current is induced momentarily

Using Agrobacterium vectors, nematodes-specific genes were introduced into the host plant. Agrobacterium naturally inserts DNA into plants by its Ti plasmid.

sp² hybridisation is very less stable at bridgehead carbon of a bicyclic compound.

The main challenge for production of insulin using rDNA technique was getting insulin assembled into a mature form

Use of genetically modified crops may increase crop production many times without use of chemicals and fertilizers. Gene coding form higher nutrient and resistance to disease can be incorporated in crop.

Conventional breeding programme takes several years to develops a new variety of crop. By use of biotechnology, required gene can be directly inserted into host plant to get required result.

The term used to refer to the use of bio-resources by multinational companies and other organizations without proper authorization from the countries and people concerned without contemporary payment is Bio-piracy. It happens when biological resources are taken or exploited without official sanction.

Flavr Savr tomato has thick fruit coat that enhance the self-life of the fruits and do not get spoiled soon. Common Indian tomato have thin coat and easily get destroyed during transportation and handling.

IV is most acidic as its conjugate base is resonance stabilised by two carbonyl groups, followed by III whose conjugate base is resonance stabilised by a carbonyl group and phenyi ring.