EASY
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DNA replication begins at specific sites situated on the molecule. Such sites are called

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Important Questions on Gene

HARD
Life Science>Relationship>Gene>DNA - The Hereditary Material
Meselson and Stahl carried out centrifugation in CsCl2 density gradient to separate:
MEDIUM
Life Science>Relationship>Gene>DNA - The Hereditary Material
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
Life Science>Relationship>Gene>DNA - The Hereditary Material
Experiments involving use of radioactive thymidine to detect distribution of newly synthesized DNA in the chromosome was performed on which plant?
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
Which of the following statements about nucleosome is true?
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
Taylor conducted the experiments to prove the semiconservative mode of chromosome replication on:
MEDIUM
Life Science>Relationship>Gene>DNA - The Hereditary Material
The molecular weight of E coil. DNA is 3.1×109 g/mol. 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
Life Science>Relationship>Gene>DNA - The Hereditary Material
E. coli fully labelled with N15 is allowed to grow in N14 medium. The two strands of DNA molecule of the first generation bacteria have:
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
Given the fact that histone binds DNA, it should be rich in:
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
E. coli has only 4.6×106 base pairs and completes the process of replication within 18 minutes; then the average rate of polymerisation is approximately:
MEDIUM
Life Science>Relationship>Gene>DNA - The Hereditary Material
Light DNA N14 transferred to N15 labelled culture medium for replication. The ratio of total number of N15 and N14 labelled strands of DNA extracted from the culture after three generations
MEDIUM
Life Science>Relationship>Gene>DNA - The Hereditary Material
What is the length of human DNA containing 6.6×109 bp ?
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
Semiconservative replication of DNA was first demonstrated in
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
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
Life Science>Relationship>Gene>DNA - The Hereditary Material
The experimental proof for semiconservative replication of DNA was first shown in a
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
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
Life Science>Relationship>Gene>DNA - The Hereditary Material
Which one of the following has phosphoric acid anhydride bonds?
EASY
Life Science>Relationship>Gene>DNA - The Hereditary Material
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
Life Science>Relationship>Gene>DNA - The Hereditary Material
Which one of the following elements is not directly involved in transcription?
MEDIUM
Life Science>Relationship>Gene>DNA - The Hereditary Material
Choose the correct pair from the following.
MEDIUM
Life Science>Relationship>Gene>DNA - The Hereditary Material
During DNA replication, Okazaki fragments are used to elongate: