Nucleic Acids and DNA Structure Basic

Which pentose sugar is predominantly found in RNA?

Deoxyribose differs from ribose by lacking an oxygen atom at which carbon position?

The non-planarity of the furanose ring in pentose sugars is termed:

A nucleotide consists of a nitrogenous base a pentose sugar and:

Which high energy bond links the consecutive phosphoryl groups in ATP?

The linkage between two successive nucleotides in a polynucleotide chain is a:

The primary structure of DNA proceeds in which direction?

In the B-DNA double helix the major groove is characterized as:

How many base pairs are there per helical turn in B-DNA?

The rise per base pair along the helix axis in B-DNA is:

Which DNA conformation is characterized by 11 base pairs per turn and a deeper narrower major groove?

The sugar pucker predominantly found in B-DNA is:

The sugar pucker predominantly found in A-DNA is:

Which DNA conformation forms a left-handed double helix?

Z-DNA occurs most readily in DNA segments containing:

The repeating unit in Z-DNA is:

In Z-DNA the glycosidic bond conformation for purines is:

Which interaction provides the specificity for DNA base pairing?

According to Chargaffs rule the amount of Adenine is always equal to:

If a DNA molecule has 20 percent Cytosine what is the percentage of Adenine?

The temperature at which half of the helical DNA structure is lost is called the:

DNA molecules with a higher G-C content have a higher melting temperature because G-C base pairs:

Increasing the salt concentration in a DNA solution will:

Extremes of pH denature DNA by:

The linking number of a relaxed circular B-DNA is given by:

Superhelical density is mathematically defined as:

DNA with a deficiency in linking number is called:

Ethidium bromide relaxes negatively supercoiled DNA by:

Intercalation of one ethidium bromide molecule causes the DNA to unwind by approximately:

Which enzyme is responsible for changing the linking number of DNA?

The first experiment to demonstrate bacterial transformation was performed by:

In Griffiths experiment which bacterial strain was virulent and caused pneumonia?

Avery MacLeod and McCarty showed that transformation was prevented only by the addition of:

In the Hershey-Chase experiment radioactive sulfur was used to label:

The Hershey-Chase experiment proved that the genetic material of T2 phage is:

Which hypothesis proposes that the first replicating molecules on earth were RNA?

RNA molecules with catalytic activity are termed:

Double-stranded RNA molecules adopt a conformation most similar to:

RNA is rapidly hydrolyzed under alkaline conditions due to the presence of:

The alkaline cleavage of RNA produces a cyclic intermediate composed of:

The Fraenkel-Conrat and Singer experiment on TMV established that:

Nucleic acids show strong UV absorption near:

For double-stranded DNA one A260 unit is equivalent to a concentration of:

For single-stranded RNA one A260 unit is equivalent to a concentration of:

Proteins absorb UV radiation strongly at 280 nm due to the presence of:

The Bradford method for protein quantification uses a dye that binds to free amino groups especially:

In the ninhydrin test which amino acid produces a yellow color instead of purple?

Molecular chaperones assist in:

Proteins that consist of multiple polypeptide chains are called:

The absorption of UV light by nucleic acids originates from the transitions of the: