Psoralen can DNA if photo-activated.

• A) Alkylate
• B)
• C)
• D)

The bond angles in protein primary structure resulting from rotations at C are labelled (phi) for the

• A) N-alpha C
• B)
• C)
• D)

Meselson and Stahl performed a classical experiment to distinguish among three possible models of DNA replication using isotope of

• A) N
• B)
• C)
• D)

DNA polymerases introduce about one mis-paired nucleotide per nucleotides.

• A) 10^5
• B)
• C)
• D)

Overall three dimensional arrangement of all atoms in protein

• A) Tertiary structure of protein
• B)
• C)
• D)

In transcription information of DNA is copied from.

• A) mRNA
• B)
• C)
• D)

Pyrimidine consist of???

• A) Heterocyclic aromatic ring structure composed of carbon and nitrogen atoms. It has a six-membered ring with two nitrogen atoms at positions 1 and 3. Examples of pyrimidines include cytosine, thymine (in DNA), and uracil (in RNA).
• B)
• C)
• D)

Most important clue of structure of DNA before 1953

• A) Erwin Chargaff
• B)
• C)
• D)

DNA with bound histone in the eukaryotes is

• A) Chromatin
• B)
• C)
• D)

During DNA replication each strand serve as

• A) template
• B)
• C)
• D)

Mutation is necessary evil as?

• A) not all mutations give advantage to organism
• B)
• C)
• D)

Replication machine achieves remarkably high degree of accuracy

• A) proofreading mechanism
• B)
• C)
• D)

The RNA AU/GC ratio was roughly.... To the DNA AT/GC ratio.

• A) Similar
• B)
• C)
• D)

RNA polymerase performs essentially the same reaction in all cells from bacteria to human,

• A) RNA
• B)
• C)
• D)

Strands of DNA are separated at the replication fork..

• A) dsDNA
• B)
• C)
• D)

Types of histone protein

• A) 5
• B)
• C)
• D)

Simplest amino acid residues

• A) glycine
• B)
• C)
• D)

The most common cyclobutane pyrimidine dimer is

• A) thymine-thymine
• B)
• C)
• D)

Enzyme that converts hydrogen peroxide into water and oxygen is

• A) catalase
• B)
• C)
• D)

Nucleotides join with bond___

• A) phosphodiester bond
• B)
• C)
• D)