Molecular basis of Inheritance TS

Nucleic acids are polymers of :

Identify the incorrectly matched pair :

\(
\begin{array}{|l|l|l|}
\hline & \text { Organism } & \text { Length of DNA } \\
\hline \text { 1. } & \text { Bacteriophage } \phi \text { 174 } & \text { 5386 base pairs } \\
\hline \text { 2. } & \text { Bacteriophage Lambda } & 48502 \text { base pairs } \\
\hline \text { 3. } & \text { Eschrichia coli } & 4 \times 10^6 \text { base pairs } \\
\hline \text { 4. } & \text { Human beings } & 3.3 \times 10^9 \text { base pairs } \\
\hline
\end{array}
\)

Which of the following is a pyrimidine base found in DNA ? 

Which of the following would be nucleoside found only in RNA ?

The backbone of a polynucleotide chain is made of :

At which position in the ribose is an additional –OH present [with respect to Deoxyribose] ?

What is another name for thymine ?

DNA was first identified by :

Watson and Crick based their model of DNA on X-ray diffraction data produced by :

The base pairing in a double stranded DNA is correctly described as : 

If each strand of a ds DNA acts as a template for a new strand, the two daughter DNA will be :

Which of the following is not a feature of the double helix model of DNA ?

The distance between a base pair in the DNA double helix is approximately :

The central dogma of molecular biology was proposed by :

In some viruses, the flow of genetic information is from RNA to DNA. These viruses are :

The length of DNA in a typical mammalian cell is approximately :

Histones are :

A typical nucleosome unit consists of about :

Nucleosomes constitute the repeating subunits of a structure in the nucleus called :

Transcriptionally, active chromatin is termed as :

Frederick Griffith discovered :

Prior to the work of Avery, Macleod, and McCarty, the genetic material was thought to be :

In Avery, Macleod, and McCarty’s experiment, the transformation of bacteria was inhibited by :

The unequivocal proof that DNA is the genetic material was provided by :

Viruses grown on radioactive sulfur contain :

Hershey and Chase proved DNA as the genetic material in their experiment because :

RNA is not the genetic material in :

A molecule that can act as a genetic material must fulfill all the following criteria except :

DNA is structurally and chemically more stable than RNA because of the following except : 

What radioactive isotope was used by Meselson and Stahl to label DNA in their experiment ?

The density gradient in Meselson and Stahl’s experiment was of :

If E.coli was allowed to grow for 80 minutes after transfer from \(
{ }^{15} \mathrm{~N} \text { to }{ }^{14} \mathrm{~N}
\) medium, the number of hybrid density DNA molecules would be :

Any mistakes during DNA replication by the enzyme would result into :

Reverse transcriptase is a:

Which of the following acts as the substrate and provides energy for DNA replication ?

DNA replication is correctly described as :

The discontinuously synthesized DNA fragments are later joined by :

A failure in cell division after DNA replication results in :

A transcription unit does not contain :

DNA-dependent RNA polymerase catalyzes polymerization in :

At any instant, RNA is transcribed on which of the following strands of DNA ?

In a transcription unit, with respect to structural genes, the promoter is located :

\(
\begin{array}{|l|l|}
\hline 1 . & \text { Upstream and 5′ } \\
\hline 2 . & \text { Upstream and 3′ } \\
\hline 3 . & \text { Downstream and 5′ } \\
\hline 4 . & \text { Downstream and 3′ } \\
\hline
\end{array}
\)

What facilitates the opening of the helix during the elongation step of transcription ?

The core RNA polymerase is capable of catalyzing which steps of transcription?

Which of the following helps in the termination of transcription?

Transcription and translation can be coupled in:

A segment of DNA coding for a polypeptide is most accurately defined as :

In eukaryotes, the sequences that appear in mature or processed mRNA are called :

In most prokaryotes, the transcription unit is :

Which of the following RNAs plays both structural and catalytic roles ?

In a transcription unit, RNA polymerase binds to :