20BT2018 - Practice Quiz_1

What are the main types of restriction enzymes?

• Type VI

• Type IV

• Type V

• Type I, Type II, Type III

Which of the following is a function of endonucleases?

• Synthesizing new nucleic acid sequences.

• Repairing damaged DNA strands.

• Cleaving nucleic acid chains at specific sites.

• Transcribing RNA from DNA templates.

What is the primary role of exonucleases in DNA processing?

• The primary role of exonucleases in DNA processing is to remove nucleotides from the ends of DNA strands.

• To facilitate RNA transcription.

• To repair damaged DNA bases.

• To synthesize new DNA strands.

How do ligases contribute to DNA repair mechanisms?

• Ligases remove damaged bases from the DNA.

• Ligases unwind the DNA strands during replication.

• Ligases seal nicks in the DNA during repair processes.

• Ligases initiate the DNA replication process.

What is the purpose of linkers in genetic engineering?

• Linkers are responsible for the transcription of genes.

• Linkers are involved in the replication of DNA.

• Linkers are used to join DNA fragments in genetic engineering.

• Linkers are used to enhance the stability of RNA.

Which of the following describes homopolymer tailing?

• The removal of identical monomer units from a polymer chain.

• The process of branching a polymer chain with various side groups.

• The addition of identical monomer units at the end of a polymer chain.

• The addition of different monomer units at the end of a polymer chain.

What is the classification of restriction enzymes based on?

• The classification of restriction enzymes is based on their temperature stability.

• The classification of restriction enzymes is based on their recognition sequences and cutting mechanisms.

• The classification of restriction enzymes is based on their origin from different organisms.

• The classification of restriction enzymes is based on their size and shape.

Which enzyme is responsible for cutting DNA at specific sequences?

• DNA polymerase

• Helicase

• Ligase

• Restriction enzyme

What distinguishes endonucleases from exonucleases?

• Endonucleases are enzymes that only function in the presence of RNA; exonucleases work with DNA.

• Endonucleases and exonucleases both cut at the ends of nucleic acids.

• Endonucleases cut within the nucleic acid; exonucleases remove nucleotides from the ends.

• Endonucleases remove nucleotides from the ends; exonucleases cut within the nucleic acid.

How do ligases facilitate the joining of DNA fragments?

• Ligases join DNA fragments by forming phosphodiester bonds between them.

• Ligases separate DNA fragments by breaking hydrogen bonds.

• Ligases inhibit the replication of DNA fragments.

• Ligases degrade RNA fragments to join DNA strands.