<span><span>The first step in DNA replication is to ‘unzip’ the double helix structure of the <span>DNA?</span> molecule.</span><span>This is carried out by an <span>enzyme?</span> called helicase which breaks the <span>hydrogen bonds?</span> holding the <span>complementary?</span> <span>bases?</span> of DNA together (A with T, C with G).</span>The
separation of the two single strands of DNA creates a ‘Y’ shape called a
replication ‘fork’. The two separated strands will act as templates for
making the new strands of DNA.<span>One of the strands is oriented in the 3’ to 5’ direction (towards the replication fork), this is the <span>leading strand?</span>. The other strand is oriented in the 5’ to 3’ direction (away from the replication fork), this is the <span>lagging strand?</span>. As a result of their different orientations, the two strands are replicated differently:</span></span>
Answer:Water covers about 70 percent of the Earth's surface, but where did it come ... These two pieces of evidence would favor an asteroid origin.
Explanation:
Structures in the mouth region of the Annelids vary in a wider range. There are some annelids evolve jaws , which can be used in seizing their victims and preys, biting pieces of vegetation, or grasping decomposing matter. Even though some have evolved their jaws, majority of them are filter feeders. What lacks them that most advanced animals have? they dont have teeth.
Answer:
They photosynthesize..
Explanation:
There are several ways deep ocean animals survive in such an enviournment..Food is scare in much of the deep sea, in parts because <u>p</u><u>h</u><u>o</u><u>t</u><u>o</u><u>s</u><u>y</u><u>n</u><u>t</u><u>h</u><u>e</u><u>s</u><u>i</u><u>s</u><u> </u>only thakes place at the ocean's surface where there's sunlight. Most animals cope with this by begin very small and meeding less to eat of by growoing very slow..
Answer: d. Extracellular matrix was discovered more than 20 years ago.
Explanation:
According to biological sciences, the extracellular matrix is a matrix that consists of three dimensional network of extracellular macromolecules such as enzymes, collagen and glycoproteins which provide structural and biological support for surrounding cells as well.
It is found that it is discovered over 20 years ago in the matrix formed in the mouse EHS sarcoma. Therefore, correct answer is (d).