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natita [175]
1 year ago
9

The change in the amino acid sequence illustrated in figure 1 caused a change in the shape of receptor X. Based on the R groups

of the original and substituted amino acids, explain why receptor X changed shape

Biology
1 answer:
erastovalidia [21]1 year ago
3 0

Answer:

The receptor X has changed shape because amino acids with charged or ionic or hydrophilic R-groups were replaced by two amino acids with uncharged or nonpolar or hydrophobic R-groups.

Explanation:

R-groups or side chains attached to the amino acids determine their properties. Polar/hydrophilic R-groups will render the amino acid hydrophilic. It is more likely to interact with polar environments like the extracellular matrix or the cytosol.

Whereas, non-polar/hydrophobic side chains render amino acids hydrophobic. This means that they world orient themselves towards the inside of the protein i.e. the tertiary structure of proteins.

According to the attached image, the original amino acid sequence is Threonine - Lysine - Glutamate - Valine - Glycine, whereas, Threonine - Isoleucine - Alanine - Valine - Glycine is the altered sequence.

You can observe that Lysine and Glutamate are polar amino acids, likely to be present on the surface of the protein. Whereas, isoleucine and alanine are non-polar, likely to be present on the inside. Therefore, this change in the sequence forces a conformational change in the receptor X.

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Rosita Sanchez is 2 months pregnant, and she and her doctor are worried because her rash was diagnosed as __________. They are c
kirill115 [55]

Answer:

Rubella

Explanation:

Rubella is a viral disease caused by the infection of Rubella virus. Some signs and symptoms of this disease are as follows -

  • A rash which begins on face and later spreads all over the body
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  • Joint pain

As in the question, the doctor found rash on the body of patient, it was diagonised as Rubella, so the doctor was worried because it can affect the development of her child.

6 0
1 year ago
A checkered hen mates with a checkered rooster. The genes for the checkered trait are codominant in both parents. What are the c
seropon [69]

Answer:

Option D, 75%

Explanation:

Let the genotype of co dominant checkered hen mates and checkered rooster be CcC and CcC

Where Cc – is the allele for chekered skin  

C – is the allele for non chekered skin

Co-dominant allele are those which irrespective of being dominant or recessive are expressed equally.  

The punnet square for the cross between these two would be  

Cc C

Cc CcCc CcC

C CCc          CC

3 out of 4 offsprings have chekered allele i.e CcCc, CcC and CcC. Thus, the probability of chekered offsprings would be 75%

6 0
2 years ago
Read 2 more answers
A culture of bacteria is fed glucose containing radioactive carbon and is then examined. During the citric acid cycle, radioacti
Feliz [49]

Answer:

-During citric acid cycle or Krebs cycle, radioactive carbon will be first appear in citric acid

Explanation:

During cellular respiration, glucose is first converted into pyruvate molecules by the process of glycolysis. These pyruvate molecules go for oxidative decarboxylation, during which acetyl co-enzyme A (acetyl CoA) is formed along with removal of carbon dioxide.

The acetyl co-enzyme enters to the next step in cellular respiration or citric acid cycle or Krebs cycle. The first step of citric acid cycle is formation of citric acid by joining of acetyl CoA and oxaloacetate.

As citric acid is first molecule formed during citric acid cycle, radioactive carbon would be first appear in citric acid.

4 0
1 year ago
A unicellular organism that produces glucose through photosynthesis would most likely contain which structure
kap26 [50]
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4 0
2 years ago
In response to seasonal changes in temperature, many organisms must alter the composition of their plasma membranes to maintain
aleksandrvk [35]

Answer:

C. a decrease in phospholipid fatty acid side chain length and a decrease in side chain saturation

Explanation:

Temperature is a factor that has a huge impact on cell membrane structure, more precisely its fluidity. So, for example, if temperature increases, the cell membrane becomes more fluid because the fatty acid tails of the phospholipids become less rigid.

5 0
1 year ago
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