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Natasha_Volkova [10]
3 years ago
11

A mutation takes place in a protein-coding gene that changes one codon resulting in a single amino acid replacement. Which type

of replacement is least likely to result in a disruption of protein structure and function?
a) a hydrophobic amino acid to a hydrophilic amino acid
b) a polar amino acid to a hydrophobic amino acid
c) an acidic amino acid to a basic amino acid
d) a hydrophilic amino acid to a hydrophobic amino acid
e) a polar amino acid to a polar amino acid
Biology
1 answer:
ikadub [295]3 years ago
8 0

Answer:

The answer is A

Explanation:

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<h2>The answer is:</h2>

B) All organisms that cannot synthesize their food by means of photosynthesis or chemo synthesis are heterotrophic.

<h2>Explanation:</h2>

All  those organisms that cannot manufacture their own food and instead obtains its food and energy by taking in organic substances in the process of photosynthesis usually in the animals and plants. All animals, protozoans, fungi, and most bacteria are heterotrophs.

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A forensic scientist is trying to find out the number of adenine in the DNA sample that he obtained from a crime scene.
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The right answer is The number of adenine will be equal to the number of thymine.

Chargaff's rules indicate that the DNA of any cell or organism must have a ratio of 1 to 1 between purine bases and pyrimidine bases and, more specifically, that the amount of guanine is equal to the amount cytosine, and that the amount of adenine is equal to the amount of thymine. This trend is found in both strands of DNA.

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3 years ago
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3. In one population, 18 individuals have long hair and 182 individuals have short hair. It is known thatmating has been random
pishuonlain [190]

Answer: p (short hair) = 0.91 and q (long hair) = 0.09

Explanation: In the population, short hair is a feature of domnant allele, because there are more short haired individuals than with long hair. In genetics, p is the frequency for dominant allele and q is for recessive allele.

For this question, short hair is allele L and long hair is allele l

So, the frequency of short hair is p and of long hair is q.

To calculate the frequencies:

Frequency of allele L = (number of copies of allele L in population) / (total number of L/l gene copies in population)

p = 182/200 = 0.91

The same formula goes for the recessive allele, so:

q = 18/200 = 0.09

Thus, the frequencies of hair allele are 0.91 and 0.09 for short and long, respectively.

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