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Amanda [17]
3 years ago
8

The chart below shows the codons that make up the genetic code and the sequence of nucleotides that corresponds to them.

Biology
1 answer:
bija089 [108]3 years ago
3 0

Answer:

The answer is C. A frame shift mutation.

Explanation: frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation caused by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three. Due to the triplet nature of gene expression by codons, the insertion or deletion can change the reading frame (the grouping of the codons), resulting in a completely different translation from the original. The earlier in the sequence the deletion or insertion occurs, the more altered the protein. A frameshift mutation is not the same as a single-nucleotide polymorphism in which a nucleotide is replaced, rather than inserted or deleted. A frameshift mutation will in general cause the reading of the codons after the mutation to code for different amino acids. The frameshift mutation will also alter the first stop codon ("UAA", "UGA" or "UAG") encountered in the sequence. The polypeptide being created could be abnormally short or abnormally long, and will most likely not be functional.

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Answer:

The correct answer is 3: "<em>High levels of Ca2+ are expected to be found </em><em>within the sarcoplasmic reticulum</em>".

Explanation:

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When a nerve impulse reaches the membrane of a muscle fiber, through acetylcholine release,  the membrane depolarizes producing the entrance of calcium from <u>extracellular space</u>. The impulse is transmitted along the membrane to the sarcoplasmic reticulum, from where calcium is released.  At this point, <em>tropomyosin is obstructing binding sites for myosin on the thin filament</em>. The calcium channel in the sarcoplasmic reticulum controls the ion release, that activates and regulates muscle contraction, by increasing its cytoplasmic levels. When <em>calcium binds to the troponin C</em>, <em>the troponin T alters the tropomyosin by moving it and then unblocks the binding sites,</em> making possible the formation of <em>cross-bridges between actin and myosin filaments.</em> When myosin binds to the uncovered actin-binding sites, ATP is transformed into ADP and inorganic phosphate.

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4 0
3 years ago
What enhances the satability of mRNA
Vlad1618 [11]

Answer:

Promoter Strength

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hope it helps : )

5 0
3 years ago
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Using the diagram, which of the structures is the oldest?<br><br> H<br> F<br> M<br> B
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6 0
3 years ago
before a strand of genetic material can be translated into a protein it must leave the nucleus and come in comtact with?
serious [3.7K]
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8 0
3 years ago
A single codon is used to signal the beginning of protein synthesis. It is commonly called the START CODON. Locate the start cod
Artemon [7]

About the question:

You will find the chart in the attached files

Answer:

The strat codon is AUG  

Explanation:

Genetic information for the aminoacids assembly during the protein synthesis is stored in short sequences of three nucleotides named <em>codons </em>in the mRNA. Each of the codons represents one of the 20 amino acids used to build the protein. The total number of possible codons is 64, from which 61 codify amino acids -more than one codon codify for the same amino acid-. One of these amino acids is also the start point of protein synthesis. And the left three codons are stopping translation points.

The codons indicating the initiation or stop points during the translation process are:

  • The start codon AUG is the most common sequence used by eukaryotic cells and places near the 5´extreme of the molecule. However, other codons might be used as well. Prokaryote cells might use the codons GUG or UUG.
  • The end codons are UAA, UAG, UGA.

4 0
3 years ago
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