<h2>Answer:</h2>
Mesosphere
<h2>Explanation:</h2>
The atmospheric layer that protects the Earth against danger of the rocks is the mesosphere. This layer is above the stratosphere. The temperature drops in this layer to about -100 degrees Celsius. This is the coldest region of the atmosphere. The mesosphere burns up most meteors and asteroids before they are able to reach the earth's surface. It becomes cold enough to freeze water vapor in its atmosphere into ice clouds.
<span>A prokaryotic cell contains no membrane-bounded organelles.
</span>With this information, we can conclude that it is the eukaryotic cells that has genetic material surrounded by a membrane.
Answer: DNA is a molecule made up of two strands, twisted around each other in a double helix shape. The two strands are complementary which have a 5 prime end and a 3 prime end. To understand this question you must first understand the steps that follow.
DNA Replication:
<u>Step one: </u>
DNA Helicase (unzips) separates the strands.
<u>Step two:</u>
DNA Primase starts the process and makes a small piece of RNA called a primer. This marks the starting point for the DNA.
<u>Step three:</u>
DNA Polymerase binds to the primer and will make the new strand of DNA. DNA Polymerase can only add DNA bases in one direction, from the 5 prime end to the 3 prime end.
- The leading strand is made continuously.
- The lagging strand does not run continuously because it runs in the opposite direction. Each fragment is started with an RNA primer. DNA Polymerase then adds a short row of DNA bases from the 5 prime to 3 prime direction. This results in okazaki fragments because it can only replicate in small chunks. The process is repeated.
<u>Step four:</u>
Once the new DNA is complete the enzyme exonuclease removes all the RNA primers from both strands of DNA.
<u>Step five:</u>
Another DNA Polymerase fills in the gaps that are left behind with DNA.
<u>Step six:</u>
DNA Ligase seals up the fragments in DNA, in both strands to make a continuous double strand.
<u>Final answer:</u>
DNA Replication cannot replicate at the same time due to the leading and lagging strand.
Good luck!
Explanation:
H2O is water and compound is an opposite of elements
Hello. This question is incomplete, you forgot to show the necessary experiment for this question to be answered. It is important to remember that you need to post the full question so that we can answer it as you deserve.
The experiment is shown in the figure attached below.
Answer:
The dependent variable is the intracellular signaling pathways in hepatocytes. The negative control would be the activation of different signaling pathways, through the similar regulation of carbohydrate metabolism by hepatocytes when cells are treated with growth hormone or insulin. The scientists continued the experiment for 240 minutes, because the hormones have different signaling times.
Explanation:
Dependent variable is one that is influenced by the independent variable and generates a result. In the case of the experiment shown in the figure below, we can see that scientists wanted to evaluate the influence of growth hormone and insulin, on the activation of intracellular signaling pathways in hepatocytes, the same or different. For this reason, we can see that the dependent variable was the intracellular signaling pathways in hepatocytes.
Negative control is a biological process that promotes a result contrary to the stimulus performed. With that, we can affirm that a negative control in the addition of hormones, would be the activation of different signaling pathways, through the similar regulation of carbohydrate metabolism by hepatocytes when cells are treated with growth hormone or insulin.
Finally, scientists decided to keep the experiment for 240 minutes, because different homorns, have different action times, so 240 minutes would be the ideal time for the two hormones to have acted and their results could be analyzed.
