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All posts related to Medical entrance

Muhilan
Shared from NEET Mock - 4 on Apr 27, 2019 10:53 PM

A heavy nucleus at rest breaks into two fragments, which fly off with velocities in the ratio of 8 : 1. The respective ratio of the radii of the fragments (assumed spherical) is

 
1 : 2
1 : 4
4 : 1
2 : 1
Please type your answer before submitting.

As the particles have different velocities their masses are different. Considering this as a SUPER ELASTIC COLLISON we get. m1v1=m2v2, as,v1:v2=8:1 ;hence m1:m2=1:8, also nuclear density is constant, let it be=D,let the volume of the particles be v1 and v2 respectively. now, v1:v2=m1/D:m2/D=1:8, as volume of a sphere=4/3 pie Rcube, R1cube:R2cube=1:8; hence,R1:R2=1:2

Muhilan
Shared from NEET Mock - 3 on Apr 26, 2019 1:31 PM

Which of the following statements is/are correct?

a. Genes are thread-like structures in the nucleus of a cell formed of DNA, which carries the chromosomes.
b. The dominant gene decides the appearance of an organism even in the presence of an alternative gene.
c. The recessive gene decides the appearance of a person in the presence of the dominant gene.

 
a only
b only
c only
b and c
a and c
Please type your answer before submitting.

When the pair is Tt, T is expressed and when the pair is tt, t is expressed. hence b and c both are correct. but genes are present in chromosomes, not the chromosomes in the gene. hence a is incorrect.

Muhilan
Shared from NEET Mock - 2 on Apr 24, 2019 11:33 PM

Two ideal junction diodes D1 and D2 are connected to a battery as shown in the figure. What is the current supplied by the battery if its terminals are interchanged?

 
0.25 A
0.5 A
0.75 A
Zero
Please type your answer before submitting.

In D2 n terminal connected to positive p connected to negative . IT is reverse biased .D1 is forward bias

Dhruv Jagannath
Shared from Chemistry (Practice Test) on Apr 23, 2019 6:18 PM

Which of the following is anhydride of perchloric acid?

 
Cl2O7
Cl2O5
Cl2O3
HCIO
Please type your answer before submitting.

Question no 16 can you give me the structure of anhydride of perchloric acid

Jeeva
Shared from NEET Mock - 6 on Apr 22, 2019 7:12 PM

Breastfeeding is the best way to feed a baby. The circulation of a two month old breast-fed baby will contain which of the following maternal antibodies?

 
IgA
IgD
IgE
IgG
IgM
Please type your answer before submitting.

Ig a is for what