Answer: Option D
Explanation: The basic unit of antibody includes two identical light and heavy chains represented by L, H respectively. These heavy chains H and light chains L binds together by disulfide bonds to form a flexible Y shape.
Thus, the stem of the Y shaped antibody is called the constant region, and the tips are known as the variable region. It is these tips that bind antigen or protein from the virus.
Therefore, the correct option is D.
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Answer:
Angiosperms are vascular plants, and all vascular plants have a life cycle in which the sporophyte phase (vegetative body) is the dominant phase and the gametophyte phase remains diminutive.
Explanation:
I hope it's help u
The plant cells are in a tree. The cytokinesis is the cells in a plant's top root. Soo, it is divided into 5 parts.
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- Shelly O
<span>Constructing recombinant DNA or rDNA scientists
should combine both DNA from two different species. Based on study, rDNA
is possible if both DNA that should be combined should have the same chemical </span><span>structure.
Most o the DNA do have the same structure they only differ in nucleotide
sequence. </span>
