Correct answer: Option D- DNA ligase
Explanation: In option A, thymine is a nucleotide, so it is present throughout the replication process, wherever it is required. It is added to the newly formed DNA. In option B, Helicase enzyme is active during initiation and elongation stage, as it facilitates the opening of the winded DNA strands. Option C is nucleotidase and it has no role in DNA replication. So, the correct answer is DNA ligase, which is option D.
The okazaki fragments formed during DNA replication are sealed at the end. And in this step, DNA ligase is used. It catalyzes the formation of phosphodiester bond between the nucleotides of okazaki fragments. So it is the last active molecule of the process.
Answer:
Sunlight is an electromagnetic wave carrying energy that is absorbed by the skin.
Explanation:
Composite Volcano: S<span>teep sided cones formed from layers of ash and lava flows.</span>
Dome Volcano: Roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano
Shield Volcano: A broad domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.<span />
<span>What is the most likely effect that a war might have a food security?
A. Crops would be burned and convoys attacked to deny food sources to the enemy
During war time, everything is done to ensure victory. Food and water of the enemies are either confiscated or burned down. Enemies will be starving and dehydrated making them susceptible to sickness or death. Decreasing there numbers and making it easier to defeat them in battle. </span>
