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Sidana [21]
2 years ago
14

Compare and constraint negative and positive feedback mechanism and explain how they relate to homeostasis

Biology
1 answer:
gavmur [86]2 years ago
6 0

Explanation:

Positive feedback occurs to increase the change or output: the result of a reaction is amplified to make it occur more quickly. Negative feedback occurs to reduce the change or output: the result of a reaction is reduced to bring the system back to a stable state.

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Explain how a mutation that changes the amino acid sequence of the protein hemoglobin affects the protein and results in sickle
Montano1993 [528]

Answer:

sickle cell anemia is caused by a mutation in the hemoglobin beta (or HBB) gene and it leads to a single change in amino acid sequence. this gene is located on chromosome 19

Explanation:

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3 years ago
A/Producer
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A because everything is fueled because of it. It does not consume or hunt anything.
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2 years ago
Assume that in cattle a spotted coat is dominant to an even coat, short horns are dominant to long horns, and the traits for coa
kow [346]

Answer:

C. 1/4

Explanation:

Let's assume that the allele for the spotted coat is "S" and the one for the even coat is "s". The allele "L" gives short horns while the recessive allele "l" imparts long horns. The genotype of the cattle heterozygous for both traits would be SsLl. A cross between two heterozygous cattle would produce progeny in following phenotype ratio=

9 spotted coat and short horns: 3 even coat and short horns: 3 spotted coat and long horns: 1 even coat and long horns.

Therefore, the proportion of the progeny with long horns = 4/16= 1/4

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3 years ago
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geniusboy [140]
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5 0
3 years ago
This bonds to cytosine (C) in DNA.
shtirl [24]

Answer: <u>Guanine </u>

According to Chargaff's rule, the base pairing in the DNA and RNA is fixed. Adenine always pairs with Thymine in DNA and Uracil in RNA. Guanine pairs up with cytosine. This complementary base pairing is universal and constant. That's why amounts are also equal. It means if cytosine is 20% in any DNA sample, then amount of guanine would be 20% as well.

4 0
2 years ago
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