Welcome to your AQA AS Biology 2 1. Which property of water helps water skating insects to move on the surface of water? Surface tension Adhesion Neutral pH High specific heat capacity2. Who discovered the double helix structure of DNA? Edison and Watson Watson and Crick Crick and James Watson and James3. Select the incorrect statement with regard to ATP. ATP is adenosine triphosphate It is a nucleotide derivative. It is formed from a molecule of ribose, 2 molecules of adenine and three phosphate groups. ATP is a complex organic chemical.4. Which of the following is a polymer of nucleotides? Proteins RNA Glucose Lipids5. Which of the following is responsible for transfering genetic information from DNA? RNA Plasmids ER Ribosomes6. The final product of DNA replication. A wide variety of proteins mRNA and tRNA DNA fragments Two DNA molecules, each of which contains a new and one old DNA strand.7. Which of the following is not necessary for DNA replication? Free DNA nucleotides Original DNA template DNA polymerase RNA8. Which property of water provides a cooling effect with little loss of water through evaporation? Strong cohesive forces between molecules Being a solvent Relatively large latent heat of vaporisation High heat capacity9. The site of DNA replication. Ribosome Golgi bodies Cytoplasm Nucleous10. A condensation reaction between two nucleotides forms the following bond. Phosphodiester bond Ionic bond Sulphide bond Glycosidic bond11. Select the incorrect statement with regard to water. It is an important solvent. It has a relatively low heat capacity. Water is a major component of cells. It has several properties that are important in biology.12. Which of the following is exposed upon unwinding the double helix structure of the DNA during DNA replication. Phosphate group Ribose sugar Cell wall Nitrogenous bases13. Select the incorrect sentence out of the following. DNA is a long nucleotide chain. The pentose sugar in DNA is deoxyribose whereas in RNA it is ribose. The common organic bases in RNA are adenine, guanine, cytosin and uracil.14. The enzyme responsible for unwinding the double helix structure of the DNA during DNA replication. DNA ligase Amylase DNA helicase DNA polymerase15. Which property of water makes it bead up on waxy surfaces? Surface tension Neutral pH Adhesion High specific heat capacity16. Select the correct statement with regard to water. Water in pure state is slightly basic. It acts as a metabolite in many metabolic reactions. It has low surface tension. It does not have strong cohesion between water molecules.17. How many haem groups are present in a complete haemoglobin molecule? 2 1 3 418. How many oxygen molecules at a time could be carried by a haemoglobin molecule? 1 2 4 319. The organic base not found in DNA. Adenine Uracil Thymine Cytosine20. Choose the incorrect statement regarding DNA replication. It begins with the unwinding of the double helix. No enzymes are involved in the process. It is an energy consuming process. It involves a series of processes.21. The enzyme responsible for forming hydrogen bonds during the process of DNA replication. DNA ligase DNA helicase DNA polymerase Lactase22. The type of bond broken by the enzyme DNA helicase during DNA replication. Ionic bonds Disulphide bonds Phosphodiester bonds Hydrogen bonds23. Choose the correct statement regarding DNA replication. 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. Free DNA nucleotidesare essential for DNA replication. This process occurs at the end of every cell division.24. Select the incorrect statement with regard to DNA replication. Cytosin pairs with guanine Thymine pairs with adenine Adenine pairs with thymine Guanine pairs with adenine25. Which of the following statement is incorrect regarding RNA? RNA has the base uracil. RNA is a type of nucleic acid called ribonucleic acid. The RNA nucleotides are joined by a bond between two successive phosphate groups. The RNA nucleotides are joined to form a single strand.Time is Up!