Question

Which of the following statements is true about RNA?
A. It contains adenine paired with thymine
B. One of the bases from DNA is replaced by uracil
C. It contains the sugar deoxyribose
D. Its nucleotides contain twice as many phosphate groups as DNAs nucleotides

Answer 1

Hint: Ribonucleic acid could be a polymeric molecule essential in varied biological roles in coding, decoding, regulation, and expression of genes. RNA and DNA are nucleic acids. Along with side lipids, proteins, and carbohydrates, nucleic acids represent one in all the four major macromolecules essential for all acknowledged kinds of life.

Complete answer:
RNA or ribonucleic acid is the genetic material of many organisms like viruses. It consists of nucleotides that are composed of 3 elements, particularly sugar molecules, element bases, and phosphate. Sugar utilized in RNA is ribose sugar. It contains four-element bases purine, guanine, pyrimidine, and uracil. purine pairs with U mistreatment 2 hydrogen bonds whereas purine pairs with pyrimidine mistreatment 3 hydrogen bonds. thymine of DNA is replaced by U in RNA.
The central dogma of biology suggests that the first role of RNA is to convert the knowledge stored in DNA into proteins. In reality, there's far more to the RNA story. Humans have four sorts of rRNAs. ribonucleic acid, or tRNA, decodes the genetic info control within the messenger RNA and helps add amino acids to a growing macromolecule chain. Scientists estimate that human cells have over five hundred completely different tRNAs. Hence, the proper answer is 'One of the bases from DNA is replaced by uracil'.
So, B is the correct option.

Note: DNA could be a double-stranded molecule, whereas RNA could be a fibre molecule. DNA is stable beneath alkalic conditions, whereas RNA isn't stable. DNA and RNA base pairing is slightly completely different since DNA uses the bases adenine, thymine, cytosine, and guanine; RNA uses adenine, uracil, cytosine, and guanine.