NEET UG 2022 — Molecular Basis of Inheritance

If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as:

If $A$ and $C$ make $30 \%$ and $20 \%$ of DNA, respectively, what will be the percentage composition of $\mathrm{T}$ and $\mathrm{G}$ ?

If DNA contained sulphur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?

If the length of a DNA molecule is $1.1$ metres, what will be the approximate number of base pairs?

In an E. coli strain, i gene gets mutated, and its product cannot bind the inducer molecule. If the growth medium is provided with lactose, what will be the outcome?

In lac operon, $z$ gene codes for :

Match List - I with List - II :  Choose the correct answer from the options given below :

Match List-I with List-II : \(\begin{array}{|l|l|} \hline \text { List - I } & \text { List - II } \\ \hline \text { (a) Bacteriophage } \phi \times 174 & \text { (i) } 48502 \text { base pairs } \\ \text { (b) Bacteriophage lambda } & \text { (ii) } 5386 \text { nucleotides } \\ \text { (c) Escherichia coli } & \text { (iii) } 3.3 \times 109 \text { base pairs } \\ \text { (d) Haploid content of human DNA } & \text { (iv) } 4.6 \times 106 \text { base pairs } \\ \hline \end{array}\) Choose the correct answer from the options given below:

Read the following statements and choose the set of correct statements: (a) Euchromatin is loosely packed chromatin. (b) Heterochromatin is transcriptionally active. (c) Histone octamer is wrapped by negatively charged DNA in the nucleosome. (d) Histones are rich in lysine and arginine. (e) A typical nucleosome contains 400bp of DNA helix. Choose the correct answer from the options given below:

Ten E. coli cells with $N15$-dsDNA are incubated in medium containing $N14$ nucleotide. After $60$ minutes, how many E. coli cells will have DNA totally free from $N15$?

The process of translation of mRNA to proteins begins as soon as :