The plateau portion of the action potential in contractile cardiac muscle cells is due to the <u>membrane potential remaining almost constant</u>.
As the membrane gradually repolarizes This will be brought on by the nearly equal movement of charge into as well as outside of the cell.
As a result of this activity, the action potential reaches a plateau because a significant amount of calcium and sodium ions are transported through these channels towards the interior of such cardiac muscle fiber.
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0-4 degrees Celsius, below which bacteria grow very slowly. This is the same as refrigerator temperature.
Please use __________ to indicate fill-in-the-blank questions.
Otherwise the question could end up being deleted for incomplete question.
Answer:
It is strong, yet flexible, allowing kelp to sway in the currents of the ocean. ... This ability to float raises the kelp to the sea surface forming a dense canopy.
Explanation:
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It should be taken into consideration the presence of frameshift mutations. Frameshift mutation, due to addition or deletion of a base, results in the change of reading frame and consequently in changed protein. But it is known that 3 nucleotides on mRNA code for the specific amino acid. If the number of inserted or deleted nucleotides is 3, it will result in the absence<span> of only 1 amino acid which is not expected to drastically change protein sequence.
Knowing all this, it can be concluded the following:
</span>
<span>-/-/+/-/- <u>OK </u>- Due to 4 deletions and 1 insertion, effectively only 3 nucleotides are missing.
</span>+/-/+ <u>Not OK</u> - Due to 1 deletion and 2 insertions, effectively only 1 nucleotide is added leading to the frameshift mutation.
+/-/+/- <u>OK </u>- Due to 2 deletions and 2 insertions, a number of nucleotides remain the same.
+/+/-/+ <u>Not OK</u> - Due to 1 deletion and 3 insertions, effectively only 2 nucleotides are added and the frameshift mutation occurs.
-/+ <u>OK </u>- Due 1 deletion and 1 insertion, a number of nucleotides remain the same.
<span>- <u>Not OK</u> - Due to 1 deletion, the frameshift mutation occurs.
</span>-/-/-/-/-/- <u>OK </u>- <span>Due to 6 deletions, it will be deleted 2 amino acids and the protein will be nearly normal.</span>
<span>+/+/+ <u>OK </u>- Due to 3 insertions, 1 amino acid will be added in excess.
</span>-/- <u>Not OK</u> - Due to 2 deletions, the frameshift mutation occurs.
Answer:
The newest classification system with the highest rank of domain, followed by kingdom corresponds to the Six Kingdom System.
Explanation:
The system of the six kingdoms was proposed last century, in the 80's, and currently remains in force. The advent of technology for genetic analysis at that time allowed studies in RNA and DNA that led to the differentiation of bacteria and archaea, establishing them in two kingdoms.
According to this classification system, there are two kingdoms of prokaryotic organisms and four eukaryotic kingdoms:
<u>Prokaryotic domain</u>:
- <em>Bacteria kingdom.</em>
- <em>Archaean kingdom.</em>
<u>Eukaryotic domain</u>:
- <em>Protista kingdom.</em>
- <em>Plantae kingdom.</em>
- <em>Fungi kingdom.</em>
- <em>Animalia kingdom.</em>
Much of the scientific world accepts this taxonomic classification system, which is considered more complete than its previous versions.
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