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

Different density but do not resemble with their parent DNA

Same density resemble with their parent DNA

Same density but do not resemble with their parent DNA

Different density but resemble with their parent DNA

EASY

Earn 100

In Meselson and Stahl's experiment, heavy isotope ¹⁵N was used in the form of

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Important Questions on Molecular Basis of Inheritance

HARD

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

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

MEDIUM

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

DNA

replication were conservative?

EASY

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

E. coli fully labelled with

{}^{15}N

is allowed to grow in

{}^{14}N

medium. The two strands of DNA molecule of the first generation bacteria have:

EASY

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

Which of the following statements about nucleosome is true?

EASY

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

The molecular weight of E coil. DNA is

3.1 \times 10^{9} g / m o l

. The average molecular weight of the nucleotide pair is

660 g / 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>DNA 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>DNA 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>DNA Replication

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

MEDIUM

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

Light DNA

(N^{14})

transferred to

(N^{15})

labelled culture medium for replication. The ratio of total number of

N^{15}

and

N^{14}

labelled strands of DNA extracted from the culture after three generations

MEDIUM

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

What is the length of human DNA containing

6.6 \times 10^{9} b p

EASY

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

Semiconservative replication of DNA was first demonstrated in

EASY

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

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

EASY

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

Which one of the following has phosphoric acid anhydride bonds?

EASY

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

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

EASY

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

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

MEDIUM

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

Choose the correct pair from the following.