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Mrrafil [7]
3 years ago
11

When a flu virus enters the body, the immune system creates antibodies made of polypeptide chains to fight the virus. The specif

ic shape of the protein allows it to bind to the virus and deactivate it. How does the antibody's primary protein structure create the specific shape to bind to flu viruses?
Biology
1 answer:
Otrada [13]3 years ago
6 0

Answer and explanation:

Antibodies are structures made of four polypeptides, <em><u>two light (L) chains and two heavy (H) chains that join together and form a molecule shaped like a "Y"</u></em>. This structure is possible thanks to the <u>disulfide bonds</u> that bind light chains and heavy chains together. While the stem of the Y is constant and doesn't change ("<em>constant region</em>"), the tips of the Y, composed of 110-130 amino acids and called "<em>the variable region</em>", vary greatly among the different antibodies and are responsible for the high specificity of these molecules.

<u>This is why we could say that the primary structure of this protein is given by disulfide bridges that twist the antibody and allow it to bind to a protein from the flu virus.</u>

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Describe ways in which a healthy artery differs from an artery affected by coronary heart disease
JulsSmile [24]

Answer:

A healthy artery is wider and has no blockages. The lumen (which is the hole in the centre of the artery), is open and clear. This means there is more blood flow. An artery of a person suffering from coronary heart disease is often blocked, usually by a fatty deposit. This means the blood does not flow as well. (See diagram, in which I would draw two arteries, one with a blockage of fatty deposit, one clear and healthy).

hope this helped you

please mark as the brainliest (ㆁωㆁ)

3 0
3 years ago
Choose the law that BEST explains the example:
german

Answer:

3rd law

Explanation:

First law of Newtons :

 Newton's First Law states that, unless an external force acts on it, an object will remain in a straight line in rest or uniform motion.  

The second law of Newtons :

The second law states that an object's acceleration depends on two variables-the net force that acts on the object and the object's mass.

The change in the linear momentum of the object is equal to the force.

Third law of Newtons :

This law states that every action has its reaction with the same magnitude but in the opposite direction.

When we push the wall , then the wall does not move because the wall is fixed but we skid opposite to the direction of applied force because wall offers an opposite force on our body.

Therefore the answer is "third law".

5 0
3 years ago
Read 2 more answers
Which of the following would be classified as concepts in anatomy?
Lera25 [3.4K]

Concepts in anatomy from the given options include:

  • The brain is composed of two hemispheres.
  • Each kidney contains approximately 6-10 pyramids.
  • The muscle on the back of the arm has three heads of origin.
  • Study of form.

<h3>What is anatomy?</h3>

Anatomy is a branch of biology that is concerned with the study of the structure of living organisms and their various parts.

Anatomy studies the position of body structures as well as the position of related structures or organs of the body.

Anatomy also studies how the structure of these body parts relates to their functions.

Therefore, concepts in anatomy from the given options are:

  • The brain is composed of two hemispheres.
  • Each kidney contains approximately 6-10 pyramids.
  • The muscle on the back of the arm has three heads of origin.
  • Study of form.

In conclusion, anatomy deals with structure of body parts of living organisms.

Learn more about anatomy at: brainly.com/question/896286

#SPJ1

3 0
1 year ago
Drag the terms on the left to the appropriate blanks on the right to complete the sentences. not all terms will be used. resethe
jek_recluse [69]

1. The right answer is in a discontinuous manner.

During DNA replication, the DNA polymerase synthesizes complementary DNA by mating on both strands, since the two strands are antiparallel, the replication is bidirectional, which means that one of the two strand is synthesized in a direction opposite to that of the direction of the enzyme, to do this, the DNA polymerase is obliged to synthesize DNA in the form of small fragments which are called Okazaki fragments, and its synthesized discontinuously (these fragments are not glued together by phosphodiester liasons, it is only after that another enzyme will intervene to ligate these fragments (DNA ligase).

6 0
3 years ago
What type of organic macromolecule shown below is the main component of cell membranes?
pickupchik [31]
<span>The basic building blocks of a cell membrane are phospholipids. Phospholipids contain a hydrophobic (insoluble in water) end made up of two fatty acid chains of nonpolar molecules such as carbons and hydrogens. The other end is hydrophobic (soluble in water) and contains polar phosphate molecules. These phospholipids are arranged in a bilayer with their hydrophilic end group exposed to water on each side of the membrane and the hydrophobic nonpolar molecules protected inside the double layer. </span>
8 0
2 years ago
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