Welcome to your CIE AS Nucleic acids and protein synthesis What can be found in both DNA and messenger RNA (mRNA)? Thymine Ribose Sugar-phosphate chain Double helix structureA condensation reaction between two nucleotides forms the following bond. Ionic bond Glycosidic bond Phosphodiester bond Sulphide bondThe enzyme responsible for forming hydrogen bonds during the process of DNA replication. DNA polymerase DNA ligase Lactase DNA helicaseChoose the incorrect statement regarding DNA replication. It is an energy consuming process. It involves a series of processes. It begins with the unwinding of the double helix. No enzymes are involved in the process.Which statement about base pairing in nucleic acids is not correct? Guanine only pairs with cytosine Uracil only pairs with adenine Adenine can pair with either thymine or uracil Thymine can pair with either adenine or uracil.Which of the following statement is incorrect regarding RNA? RNA is a type of nucleic acid called ribonucleic acid. RNA has the base uracil. The RNA nucleotides are joined to form a single strand. The RNA nucleotides are joined by a bond between two successive phosphate groups.Choose the correct statement regarding DNA replication. This process occurs at the end of every cell division. When the cell divides, each daughter cell will inherit different copies of DNA. Free DNA nucleotides are essential for DNA replication. This is a process by which a cell does not make an identical copy of its DNA.What is the function of rRNA? Helps in the process called translation. Forms ribosomes which act as the site for protein synthesis. Helps in unwinding the DNA strands. Helps in the process called transcription.What is the function of mRNA in protein synthesis? Deciphers the codons. Unwinds the DNA double helix. Transcripts the base sequence of DNA molecule and carries to the cytoplasm. Associates with a set of proteins to form ribosomes. What is the function of tRNA in protein synthesis? It rewrites the sequence of bases of a section of DNA in a process called transcription. Carries the code for building a specific protein. Carries relevant amino acids upto the ribosome. Ribosome formation.