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faust18 [17]
3 years ago
8

The student correctly associates macrocytic and enlarged red blood cells with which type of anemia

Biology
2 answers:
Nat2105 [25]3 years ago
4 0

Macrocytic and enlarged red blood cells are characteristic for macrocytic anemia.

Macrocytic anemia is a blood disorder which occurs when the body produce large red blood cells and not enough normal red blood cells. Macrocytic anemia is most often caused by a lack of vitamin B-12 and folate with the symptoms like loss of appetite or weight, pale skin (including lips and eyelids), brittle nails, diarrhea, fatigue…


Anna [14]3 years ago
4 0
<h2>Type of anemia </h2>

The student correctly associates macrocytic and enlarged red blood cells with a type of anemia called a megaloblastic anemia. In this type of anemia, red blood cells (RBC’s) are not produced properly so the cells are very large. They are not able to withdrawal the bone marrow to come into the bloodstream and carry or transfer the oxygen.  

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C. internal fertilization

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Two yeast cells were placed into a special container to which food was continually added, to keep it at a constant concentration
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Explanation:

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Silk is composed of β sheets whose polypeptide chains consist of the repeating sequence of Gly-Ser-Gly-Ala-Gly-Ala. Based on thi
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The correct answer is: d.a nonpolar side chain.

Explanation:

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  • Amino acids can be broadly categorised into non-polar and polar based on the nature of the side chain.
  • The non-polar amino acids possess hydrocarbon side-chains which are hydrophobic in nature, so they tend to avoid interaction with water molecules and usually remain in the protein interior. They are uncharged and cannot form any hydrogen bonds with water molecules.
  • The polar amino acids possess charged or polar side-chains which are hydrophilic in nature, so they tend to undergo interaction with water molecules and usually remain on the protein surface. They can form hydrogen bonds with molecules of water.
  • Beta sheets can be defined a secondary structure of the protein in which the polypeptide sequence forms horizontal strands which are linked to each other by loops. Each strand interact with each other by the formation of hydrogen bonds between the C=O group of one peptide (amide) bond in one strand with the N-H group of another peptide (amide) bond in another strand.
  • Apart from these bonds, the non-polar side chains of each amino acid in one strand forms hydrophobic or Van der Waals interactions with the non-polar side chains of each amino acid in the other strand. The polar or charged  side chains of the amino acids on each strand form either hydrogen bonds with water molecules or with oppositely charged side chains.
  • In the given question, glycine and alanine are non-polar amino acids but serine is a polar amino acid. The side-chains of the non-polar amino acids will tend to face towards the interior of the beta sheet thereby forming hydrophobic interactions with each other, while the serine will tend to face the exterior of the beta sheet so that it can form hydrogen bonds with water molecules.
  • As the number of non-polar amino acids is far more than polar amino acids so the effect of non-polar amino acids will prevail in the beta-sheet.

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