Answer: The answer is B: Because the earth's axis is tilted.
Explanation:
Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees. The tilt in the axis of the Earth is called its obliquity.
Yes you are correct, it is a chromosome
Answer: D. Spiral staircase
Explanation: Hope that helped you a ton.
Answer:
Explanation:
Proteins, such as RNA (ribonucleic acid) polymerase, were loaded into lane 2. TFIIB and TFIID are two forms of TFII. These proteins attach to the fragment of DNA. Furthermore, these proteins shield DNA from the DNase enzyme, which may trigger DNA to split. As a result of the above findings, we may conclude that the inserting proteins(RNA polymerase, TFIID and TR 8 proteins) cover the area between 500 and 800 bp (base pair) in the DNase I footprinting experiment.
As a consequence, the length duration is 300bp since the promoter area is about 500-800bp and is not digested by DNase after incubation of inserting proteins.