Answer:
Helicase
Explanation:
The DNA double helix is unzipped by the enzyme *HELICASE*. The enzyme breaks the hydrogen bond between the bases thereby causing the strands of the double helicase to unzip. The action of the helicase enzyme uses energy from ATP. The unzipping of the double helix does not occur in a swift move. One end of the DNA molecule with 5'-3' is opened up showing the antiparallel single strands. The end that is opened is termed INITIATION SITE of replication. The opening look like someone standing with legs wide open. The wide opening is called REPLICATION FORK. The single strands of the fork are usually unstable but their stability is maintained by the DNA-binding-proteins. Having opened the double helix, the replication would then continue in the 5'-3' direction of one of the two antiparallel single strands.
People with HIV are unable to fight off these rare diseases because they have a weakened immune system.
Answer:
When ocean salt water evaporates, the salt in the water is left in the water. This causes the salt water to become heavily filled with salt.
Explanation:
Answer:
C. They all use a cut and paste mechanism.
Explanation:
DNA transposons can go through a replicative or nonreplicative transposition.
The replicative transposition uses a "copy and paste" mechanism that consists of the introduction of a new copy of the transposable element in a new position, meanwhile <u>the old copy remains in the original position</u>. This determines an increase in the number of copies.
The nonreplicative transposition uses a "cut and paste" mechanism that consists of the cleavage of the transposable element from its position and its <u>insertion in a new position</u> without increasing the number of copies.
Retrotransposons, on the other side, move through RNA intermediates generated by the reverse transcriptase.
The materials plants need in order to perform photosynthesis are Water and carbon dioxide.
<h3>What is photosynthesis?</h3>
Photosynthesis is a process of converting light energy into chemical energy.
Photosynthesis is performed by chlorophyll-containing plants to produce their food.
The process of photosynthesis is carried out in the presence of sunlight.
It requires water, carbon dioxide, and sunlight.
Thus, the correct option is B, water, and carbon dioxide.
Learn more about photosynthesis, here
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