Question: Unwinding of DNA is done by____________?

• 1. DNAse
• 2. Topo isomerase
• 3. Ligase
• 4. Reverse transcriptase

Question: Which of the following process in involved in conversion of DNA to RNA___________?

• 1. Conjugation
• 2. Transduction
• 3. Translocation
• 4. Transcription

Question: Restriction endonuclease cleaves______________?

• 1. Double stranded DNA
• 2. SIngle stranded DNA
• 3. SIngle stranded RNA
• 4. Polypeptide

Question: Genes are_____________?

• 1. Ribonucleic acid
• 2. Deoxy ribonucleic acid
• 3. Lipoproteins
• 4. Chromo proteins

Question: DNA double helix is bound by_____________?

• 1. Covalent bond
• 2. Hydrogen bond
• 3. Disulfide linkage
• 4. Vander wall forces

Question: Which base is not found in DNA________________?

• 1. Adenine
• 2. Guanine
• 3. Cytosine
• 4. Uracil

Question: First permanent molars begin to calcify at ______________?

• 1. 6 months of intra utrerine life
• 2. At birth
• 3. Before decidous incisors
• 4. About 1 year after birth

Question: Maxillary primary cuspid enamel completion takes place at______________?

• 1. 6 months in utero
• 2. 6 months after birth
• 3. 9 months in utero
• 4. 9 months after birth

Question: The tooth bud for the third molar is initiated at about the age of______________?

• 1. 6th month I.U
• 2. 1st year of life
• 3. 2nd year of life
• 4. 8th year of life

Question: The first macroscopic indication of morphologic development of primary incisors approximately at____________?

• 1. 11 weeks in utero
• 2. 14 weeks in utero
• 3. 16 weeks in utero
• 4. 6 weeks in utero