Practice questions on how DNA replicates, the semiconservative model, and the enzymes and proteins involved in the process. Essential for genetics exam prep.
DNA polymerase I removes RNA primers and fills the gaps with DNA nucleotides during replication.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
In semi-conservative replication, each daughter DNA molecule consists of one parental and one newly synthesized strand.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
Topoisomerase prevents excessive supercoiling of DNA ahead of the replication fork by cutting and rejoining the DNA strands.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
Peptidyl transferase, an enzymatic activity of rRNA, catalyzes peptide bond formation during translation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
DNA ligase joins Okazaki fragments by forming phosphodiester bonds between them.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
DNA polymerase does not unwind the DNA helix; helicase is responsible for this function.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
DNA ligase joins Okazaki fragments on the lagging strand by forming phosphodiester bonds.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
The poly-A tail protects eukaryotic mRNA from degradation and aids in translation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
Chaperone proteins assist in the proper folding of newly synthesized proteins to ensure their functional conformation.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
Transcription factors regulate gene expression by binding to specific DNA sequences and influencing transcription.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
DNA replication is semi-conservative, meaning each new DNA molecule consists of one parental and one newly synthesized strand.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
DNA ligase seals the nicks between Okazaki fragments by forming phosphodiester bonds.
Ref: NCERT Class 12 Biology Chapter 5: Molecular Basis of Inheritance DNA Replication - Semiconservative and Machinery
