Which of the following correctly describes the structure of tRNA? A. 3 base codon one the bottom, Amino acid attachment site on top, held together by Hydrogen bonds B. 3 base codon one the bottom, Amino acid attachment site on top, phosphate groups on the left and right sides C. 3 base anticodon one the bottom, Amino acid attachment site on top, held together by Disulfide bonds D. 3 base anticodon one the bottom, Amino acid attachment site on top, held together by Hydrogen bonds

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

All organisms contribute some water to the water cycle by conducting

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.