Welcome to your Eduqas Core Quizz 1 Which statement about base pairing in nucleic acids is not correct? Thymine can pair with either adenine or uracil. Uracil only pairs with adenine Guanine only pairs with cytosine Adenine can pair with either thymine or uracil What is the most important monosaccharide in energy metabolism? Glucose Fructose Galactose Ribose Which of the following is not a disaccharide? Glycogen Lactose Maltose Sucrose Solution of NaCl in water happens via ____________ hydrated ions oxidised ions reduced ions hydrogen bonds The common unit among sucrose, maltose and lactose is _____________ Glucose Fructose Galactose Xylose Glycogen is very good for energy storage due to Branched chains Straight chains 30000 subunits Single subunit Which are the building blocks of triglycerides? Glycerol & fatty acids Amylose & amylopectin Glycerol and amylose Amylopectin and fatty acid Starch is used for glucose storage by Plants Plants & animals Animals Microbes Which other type of organisms may use glycogen for energy storage apart from animals? Fungi Bacteria Plants Amoeba A condensation reaction between two amino acids forms the following bond. Peptide bond Glycosidic bond Ester bond Ionic bond A special type of diffusion involving water molecules only. Osmosis Facilitated diffusion Active transport Bulk transport Which of the following statement is incorrect regarding RNA? The RNA nucleotides are joined by a bond between two successive phosphate groups. The RNA nucleotides are joined to form a single strand. RNA is a type of nucleic acid called ribonucleic acid. RNA has the base uracil. What can be found in both DNA and messenger RNA (mRNA)? Sugar-phosphate chain Double helix structure Ribose Thymine The enzyme responsible for forming hydrogen bonds during the process of DNA replication. DNA polymerase DNA ligase DNA helicase Lactase Choose the correct statement regarding DNA replication. Free DNA nucleotides are essential for DNA replication. This process occurs at the end of every cell division. This is a process by which a cell does not make an identical copy of its DNA. When the cell divides, each daughter cell will inherit different copies of DNA. Choose the incorrect statement regarding DNA replication. No enzymes are involved in the process. It is an energy consuming process. It involves a series of processes. It begins with the unwinding of the double helix. What is the function of mRNA in protein synthesis? Transcripts the base sequence of DNA molecule and carries to the cytoplasm. Unwinds the DNA double helix. Associates with a set of proteins to form ribosomes. Deciphers the codons. Which small molecule is released during the formation of a peptide bond? H2O CO2 Glucose NH3 The mild shift in the structure of enzyme due to interaction with substrate is explained with induced-fit model lock & key model hyperlock model transition-state model Purines and pyrimidines in the structure of DNA are nitrogeneous bases phosphate groups sugar mononucleotides The basic structure of a nucleotide contains sugar moeity made of 5 carbons 6 carbons 4 carbons 8 carbons Time is Up!