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Paraphin [41]
1 year ago
11

2 points

Biology
1 answer:
sweet [91]1 year ago
8 0
<h2>Answer:</h2><h2>Human blood grouping is mainly based on the antigens present on their RBC (red blood cells) and in plasma into various groups but the main antigens are namely A/B and Rh antigens.</h2><h2 /><h2>Depending on A/B antigens humans are grouped (ABO Grouping) into</h2><h2 /><h2>A group: those having A named antigen on their RBC.</h2><h2 /><h2>B group: those having B Antigen on their RBC.</h2><h2 /><h2>AB group : Those having both A B antigens on their RBC.</h2><h2 /><h2>O group: those having no antigens on their RBC.</h2><h2 /><h2>Depending on the presence of Rh antigens they are grouped into Rh positive or negative group.</h2><h2 /><h2>So if the person has both A and Rh antigens then he will be A positive blood group. But having only A antigen but not Rh Antigen then he will be A negative group.</h2>

<h2>Extra Information:</h2><h2>In addiition to these there is also the HH group. The peculiarity is that they do not express the H antigen. As a result they cannot form A antigens or B antigens on their red blood cells. Thus they can donate blood to anybody with ABO grouping but can receive blood only from Bombay blood group people.</h2><h2 />
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3 years ago
Based on the details provided in Act 1, Scene 2, which best describes Romeo’s personality?
nalin [4]

Based on the details provided in Act 1, Scene 2, the best describes Romeo’s personality, He is more concerned with what Benvolio thinks than with his own emotions.

<h3>How does Act 1 describe Romeo?</h3>

A young man of nearly sixteen, Romeo is handsome, intelligent, and sensitive.

Though hasty and immature, his idealism and passion make him an extremely likable character.

He lives in the centre of a violent feud between his family and the Capulets, but he is not at all interested in violence.

Thus, option "3" is correct.

To learn more about Romeo’s click here:

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1 year ago
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Answer:

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Cellulose is a polysaccharide, cell walls of plant cells are made of cellulose. Termites eat cellulose and live on cellulose for their energy needs. Termites chew dead wood, but for its digestion termites depend on bacteria and protozoa which are present in their gut. They provide enzymes which can digest the cellulose of wood. Thus, they are in mutualistic relationship with termites. These microbes may starve ouside the termite body.

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How are nucleotides linked together to form a polynucleotide chain? View Available Hint(s) How are nucleotides linked together t
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The correct answer is: In DNA and RNA, a phosphodiester linkage connects the 3' carbon of one nucleotide and the 5' carbon of another.  

The phosphate of one nucleotide is covalently bound to the sugar of the next nucleotide in DNA molecule (or hydroxyl groups in phosphoric acid react with hydroxyl groups on 3' carbon atom of one sugar molecule (deoxyribose) and the 5' carbon atom of another sugar molecule (deoxyribose) to form two ester bonds). In RNA molecule linkage is between the 3' carbon atom of one sugar molecule (ribose) and the 5' carbon atom of another, (ribose).  

Hydrolysis of phosphodiester bonds is catalyzed by the action of enzymes phosphodiesterases.

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