Question: Which enzyme separates the two strands of DNA?
Answer:
- DNA helicase is an enzyme that separates the two strands of DNA during processes like DNA replication and transcription.
- It unwinds the double helix structure of DNA by breaking the hydrogen bonds between the complementary nucleotide bases.
- As DNA helicase moves, it separates the two DNA strands, creating a replication or transcription bubble where the unwound DNA serves as a template for synthesis.
| Enzyme | Description | Function |
| DNA Helicase | Enzyme | Separates the two strands of DNA by breaking hydrogen bonds between nucleotide base pairs |
| Function | DNA replication, repair, and transcription | Plays a crucial role in various DNA metabolic processes, including DNA replication, repair, and transcription |
| Directionality | Moves in a 5′ to 3′ direction on one strand and 3′ to 5′ on the other strand | Unwinds the DNA strands in opposite directions during replication or transcription |
| Unwinding | Separates DNA strands | Unwinds the double helix structure, creating a replication or transcription bubble |
| Processivity | Exhibits high processivity | Can unwind several base pairs before dissociating from the DNA |
| Co-factor | Often requires accessory proteins | Various proteins can assist helicase in its activity, including single-stranded DNA-binding proteins (SSBs) |
| Regulation | Controlled by regulatory factors | Activity can be modulated by other proteins and factors to ensure proper timing and regulation |
Important Questions about Enzymes
- Enzymes MCQs
- Inhibition in enzymes
- Which enzyme digests starch?
- Which enzyme digests protein?
- which enzyme is present in saliva?
- Which enzyme is not present in succus entericus?
- Which enzyme breaks down protein in the stomach?
- Which enzyme converts fibrinogen to fibrin?
- Which enzyme converts glucose into alcohol?
- Which enzyme digests fat?
- Which enzyme digests milk protein?
- Which enzyme is used in PCR?
- Which enzyme unzips the DNA double helix?
- Which liver enzyme increases with alcohol?
- Which enzyme cuts DNA?
- Which enzyme catalyzes the first step of glycolysis?
- Which enzyme binds DNA fragments together?
- Which enzyme transcribes DNA into RNA?
- which enzyme adds new nucleotides?
- Which enzyme digests cellulose?
- Which enzyme separates the two strands of DNA?
- Which enzyme converts carbohydrates into glucose?
- Which enzyme removes RNA primer?
- Which enzymes help in digestion?
- Which enzyme works best in acidic conditions?
- Which enzyme synthesizes tRNA?
- Which enzyme secreted by pancreas?
- Which enzyme converts maltose into glucose?
- Which vitamins work as coenzyme?