DNA is a double helix formed by base pairs attached to a __ backbone. sugar-phos
ID: 164406 • Letter: D
Question
DNA is a double helix formed by base pairs attached to a __ backbone. sugar-phosphate protein-phosphate transfer RNA messenger RNA in a deoxygenated environment, how does the HBS protein affect a red blood cell? a It causes the cell to change shape. It causes the cell to change color. It causes the red blood cell to change into a platelet. It causes the red blood cell to change into a white blood cell. Three individuals lived in a mosquito-infested area of central Africa. Individual 1 only has HBA; Individual 2 has HBA and HBS; and Individual 3 only has HBS. If all other medical conditions are the same, which individual would MOST LIKELY have better health? Individual 1 Individual 2 Individual 3 Individuals 2 and 3 We know that replacing one amino acid in the 6th position changes HBA to HBS. in normal to high oxygenExplanation / Answer
7. A. Sugar phosphate backbone.
DNA is a double helix formed of two polynucleotide chains which are formed of nucleotides. In Each polynucleotide chain ,sugar molecule of one nucleotide is bonded with phosphate group of its neighbouring nucleotide, thus forming sugar phosphate backbone where as nitrogen bases lie in the inside of the molecule.
8. A. It causes a cell to change its shape.
In sickle cell anemia, RBCs become sickle shaped under low oxygen condition due to defective haemoglobin in them.
9. D. Individual 2 and 3.
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