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mash [69]
4 years ago
6

What substance in the esophagus lining helps make swallowing easier?

Biology
1 answer:
irina1246 [14]4 years ago
6 0
The substance is saliva
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The effects of point mutations on polypeptides Point mutations are those that alter a single base pair or base location, and inc
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Answer:

The sequence from least damaging to most damaging is silent, missense, frameshift, and nonsense mutation.

Explanation:

A silent mutation refers to a modification in the sequence of nucleotide bases that constitutes DNA, however, it does not result in a substantial change in the amino acid or in the function of the entire protein. In missense mutation, one DNA nucleotide gets switched out with another one in a manner, which modifies the specified amino acid.  

When a missense mutation takes place in the molecule of DNA, it changes one of the sequences of RNA codon produced at the time of transcription. A frameshift mutation refers to a specific kind of mutation, which comprise either deletion or insertion of the additional bases of DNA. Following the mutation, the entire sequence of DNA will be read incorrectly.  

A nonsense mutation refers to a genetic mutation in the sequence of DNA, which leads to the formation of the shorter or unfinished protein product. This mutation takes place when an undeveloped nonsense or stop codon gets presented in the sequence of DNA.  

Thus, the silent mutation is the least damaging as it does not exhibit any influence on the function or composition of the protein. While nonsense mutation shows the most damaging effect as it results in an abrupt termination peptide chain.  

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3 years ago
Which statement BEST describes a herbivore?
timofeeve [1]
The correct answer is an animal the consumes plants
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The expression of a gene is said to be ‘turned on’ when certain signals interact with the promoter of a gene and RNA is prod
marusya05 [52]

Answer:

Explanation:

the process of transcription is defined as a process by which cells are able to allow for expression of their genes. this involves how DNA is read and written into RNA (mainly messenger RNA). mRNA production then guides the synthesis of various proteins. the process of transcription occurs in three stages which include initiation, elongation and termination. when certain signals interact with the promoter of a gene, transcription is initiated allowing for some regions of the DNA to be transcribed in the 5 to 3' direction. such that the newly synthesized strand of mRNA is complementary to the non coding sequence. Controlling the production of mRNA in the nucleus allows the regulation of gene expression.

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B

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Light shows duality i.e it shows properties of both particle as well as wave.

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