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ivanzaharov [21]
3 years ago
9

A polypeptide in a wild type microbe contains the sequence Leu-Pro-Tyr-Ser-Pro. A phenotypic variant of the species has the pept

ide sequence Leu-Pro-Cys-Ser-Pro. This is an example of a(n):______.
Biology
1 answer:
Katen [24]3 years ago
8 0

Answer:

The mentioned case is an illustration of the missense mutation. A missense mutation is a kind of nonsynonymous substitution, that is, it is a mutation in which a variation in a solitary nucleotide leads to the formation of a codon, which encrypts for a distinct kind of amino acid.  

When a missense mutation takes place within a DNA, a modification in one of the RNA codon sequences results at the time of transcription. This change in codon will ultimately result in the formation of a different amino acid, which gets presented within a protein at the time of translation. Like in the given case, a change in codon resulted in the substitution of the amino acid tyrosine with an amino acid cysteine.  

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Which of the following correctly compares cloning and gene therapy?
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Answer:

<em>The correct option is C) Both cloning and gene therapy are types of biotechnology.</em>

Explanation:

Gene therapy is a method in which scientists try to treat a disease by inserting a functional gene into an organism. This gene might be able to cure the disease instead of using drugs or surgery for treatment. Hence, gene therapy uses the techniques of biotechnology.

Cloning can be described as a type of biotechnology in which identical copies of a gene, tissue, organ or organism might be produces.  

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3 years ago
Reproductive isolating mechanisms are divided into categories based on when they act. _____ isolating factors prevent fertilizat
Cerrena [4.2K]

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Explanation:

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However, individuals are considered to be diverge on the phylogeny tree and different species, when they cannot reproduce.

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Mechanisms of postzygotic isolation include hybrid inviability, hybrid breakdown, and hybrid sterility.

6 0
3 years ago
Andrew wants to conduct an experiment to learn if he can use high temperatures to
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A

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Describe the effects of the various antibiotic drugs you used. Were they all equally effective at controlling bacterial growth?
Kipish [7]

Answer:

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Based on this analogy, penicillin with wide usage for control  of bacteria growth  with  diameter of 3mm, is the most effective antibiotic drugs.However, Erythromycin which is also widely used control growth with diameter of 5mm  or 6mm depending on   type of bacterial.

Therefore, the least 3mm  diameter presented by penicillin is an indication that , antibiotic drugs  are not effective enough, and further research need to be done to control growth of bacteria and therefore its   pathogenic  effects.  

Explanation:

8 0
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