The enzyme DNA polymerase adds new nucleotides to

Important Questions on Molecular Basis of Inheritance

HARD

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Meselson and Stahl carried out centrifugation in CsCl₂ density gradient to separate:

MEDIUM

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Which one of the following will be the ratio of heavy, intermediate and light bands in Meselson and Stahl's experiment after two generations if $\mathrm{DNA}$ replication were conservative?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

E. coli fully labelled with ${}^{15}\mathrm{N}$ is allowed to grow in ${}^{14}\mathrm{N}$ medium. The two strands of DNA molecule of the first generation bacteria have:

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Which of the following statements about nucleosome is true?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Taylor conducted the experiments to prove the semiconservative mode of chromosome replication on:

MEDIUM

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

The molecular weight of E coil. DNA is $3.1\times {10}^9\mathrm{ }\mathrm{g}/\mathrm{m}\mathrm{o}\mathrm{l}$. The average molecular weight of the nucleotide pair is $660 \mathrm{g}/\mathrm{mol}$ and each nucleotide pair contributes to 0.34 nm to the length of DNA. The length of E coli DNA molecule will be approximately:

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Experiments involving use of radioactive thymidine to detect distribution of newly synthesized DNA in the chromosome was performed on which plant?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Given the fact that histone binds DNA, it should be rich in:

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

E. coli has only $4.6\times {10}^6$ base pairs and completes the process of replication within $18$ minutes; then the average rate of polymerisation is approximately:

MEDIUM

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Light DNA $\left({\mathrm{N}}^{14}\right)$ transferred to $\left({\mathrm{N}}^{15}\right)$ labelled culture medium for replication. The ratio of total number of ${\mathrm{N}}^{15}$ and ${\mathrm{N}}^{14}$ labelled strands of DNA extracted from the culture after three generations

MEDIUM

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

What is the length of human DNA containing $6.6\times {10}^9 bp$ ?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Semiconservative replication of DNA was first demonstrated in

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Considering the average molecular mass of a base to be 500 Da, what is the molecular mass of double stranded DNA of 10 base pairs?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

The experimental proof for semiconservative replication of DNA was first shown in a

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

A mixture of equal numbers of fast and slow dividing cells is cultured in medium containing a trace amount of radioactively labeled thymidine for one hour. The cells are then transferred to regular (unlabeled) medium. After 24hrs of growth in regular media

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Which one of the following has phosphoric acid anhydride bonds?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Melting temperature for double-stranded DNA is the temperature at which 50% of the double-stranded molecules are converted into single stranded molecules. Which one of the following DNA will have the highest melting temperature?

EASY

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Which one of the following elements is not directly involved in transcription?

MEDIUM

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

Choose the correct pair from the following.

MEDIUM

Biology>Genetics and Evolution>Molecular Basis of Inheritance>Replication

During DNA replication, Okazaki fragments are used to elongate: