ANSWER:
-Nucleotide;
-Deoxyribose
DNA is composed of repeating structural units called nucleotide. Deoxyribose is the five-carbon sugar found in DNA.
Explanation;
-Nucleotides are the building blocks of nucleic acids. Nucleotides are linked together to form nucleic acids. The three parts of a nucleotide are; At least one phosphate group , pentose sugar and a nitrogenous base.
-The sugar that is found in DNA is the deoxyribose sugar that is a five carbon sugar in DNA.
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Answer:
Th acceptable distance of tubulin monomers along a protofilament is : <u>A. 4nm</u>
Explanation:
MICROTUBULES are an important component of the cytoskeleton of eukaryotic cells. Its function is part of a structural role that helps define cell morphology, and also serves as an intracellular motor for some proteins such as kinesin and dynein.
For the correct formation of the structures called microtubules to occur, a process called polymerization is required. In this process there is a head-to-tail junction in which the dimer junction between tubulines forms a structure called protofilaments and those protofilaments run along the microtubule. Then, the other process occurs in which, by lateral interactions between the structures mentioned above , the wall of The microtubule will be completed.
Plants leaves, roots and stems are in the organ systems level.
—Evidence—
•] Plants contain just two organ systems. The shoot system includes all of the parts above the ground, such as leaves and stems, while the root system includes all of the parts below the ground, such as roots and tubers.
The pharynx is where the respiratory path crosses the digestive pathway.
The pharynx is a cavity behind the nose and mouth, which connects them to the esophagus.