A scientist isolates mRNA from the cytoplasm of some mouse cells. She separately isolates the DNA from mouse cells and heats the
DNA to make it single-standard. She mixes the single-stranded DNA with the mRNA and allow hybrid (DNA-mRNA) double-stranded molecules to form. She observes long loops of single-stranded nucleic acid in the hybrid molecules. Are the single-stranded regions in the DNA strand or in the mRNA strand? What part of the gene do these loops represent? Would your expect to find these same loop structures if the scientist used RNA and DNA from bacteria rather than from mice?
A. The observed single stranded regions are found in the mRNA.
B. The loops represent introns (Non-coding portions of the mRNAin primary transcript ). The intron sequences are removed to form a mature mRNA by splicing.
C. If the scientist use RNA and DNA from bacteria, loops cannot be seen. Because introns are produced in only eukaryotes but not in prokaryotes.
Tans from a tanning bed or from the sun are proof of UV radiation harm. Each time you tan you are collecting sun harm which can cause <em>wrinkles, hanging skin, and skin malignant growth.</em>
Tanning meeting can expand the danger of creating skin malignancy.
<em>There is nothing of the sort as a sound suntan.</em> Any adjustment in your normal skin shading is an indication of skin harm.
Proof recommends tanning incredibly expands your danger of creating <em>skin malignancy. </em>
<em>The expansion in skin color called melanin, which makes your skin tan, is an indication of harm.</em>
<span>The difference that you are searching for is the addition of Appendages. They appeared in Cambrian animals and were used to increase their physical capabilities like when sensing and processing the information found in the environment. Common appenadges found in animals are things like antennae found in insects that are used to help them communicate or notice things or similar things.</span>
