AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Helicase is a protein that breaks the hydrogen bonds between complementarystrands of DNA to allow DNA replication occur. What type of biomolecule contains the code for making helicase?

A	Carbohydrate
B	Lipids
C	Protiens
D	Nucleic acids

Explanation:

Detailed explanation-1: -DNA helicases are molecular motors. Through conformational changes caused by ATP hydrolysis and binding, they move along the template double helix, break the hydrogen bonds between the two strands and separate the template chains, so that the genetic information can be accessed.

Detailed explanation-2: -DNA helicases catalyze the disruption of the hydrogen bonds that hold the two strands of double-stranded DNA together. This energy-requiring unwinding reaction results in the formation of the single-stranded DNA required as a template or reaction intermediate in DNA replication, repair and recombination.

Detailed explanation-3: -Helicases are molecular motor proteins present in viruses, bacteria, and eukaryotes [1, 2]. They harness the chemical energy of ATP hydrolysis to break the energetically stable hydrogen bonding between the duplex DNA.

Detailed explanation-4: -Posted April 29, 2022. Hydrogen bonds in DNA replication are broken down by the helicase class of enzymes. This causes the double-stranded DNA molecule to unzip into two single strands, allowing each strand to be replicated.

There is 1 question to complete.