Welcome to your AQA AS Biology 1 1. Select the incorrect statement regarding cells. Cells have basic features in common. Cells are always nucleated. Differences between cells are due to the addition of extra features. All life on Earth exists as cells.2. Which of the following has no membrane? Nucleolus Nucleus Golgi bodies ER3. Select the incorrect statement with regard to cell-surface membranes. Some embedded proteins in the cell-surface membrane are involved in cell signalling–communication between cells. Some embedded proteins in the cell-surface membrane act as antigens. All cells do not have cell-surface membranes. Cell-surface membranes contain embedded proteins.4. The most common protein found in animals. Collagen Haemoglobin Albumin Keratin5. The most abundant organic molecule present on the earth. Pectin Glucose Hemicellulose Cellulose6. Which of the following is not a disaccharide? Maltose Glycogen Lactose Sucrose7. Select the incorrect statement about triglycerides. Triglycerides are soluble in certain organic solvents. Triglycerides are soluble in water. They are the most common form of lipids. Triglycerides are fats and oils.8. Which is known as the universal energy carrier? ADP DNA Nucleus ATP9. Select the incorrect sentence out of the following. The relative simplicity of DNA led many scientists to doubt that it carried the genetic code. RNA is a short polynucleotide chain. The functions of DNA amd RNA are the same. DNA has a double helix structure.10. Which indicates an indirect evidence for evolution? Existance of all life on Earth as cells. The fact that all cells arise from other cells. Addition of extra features in cells. Presence of basic features in cells.11. Select the incorrect statement from the following. All cells arise from other cells. Meiosis and mitosis takes place in eukaryotic cells. All cells have a cell-surface membrane. Meiosis takes place in prokaryotic cells.12. The composition of starch. Amylose only Amylose and glycoprotein Amylose and amylopectin Amylopectin only13. Which of the following does not react with Benedict's solution? Sucrose Fructose Glucose Maltose14. The bond which does not exist in the structure of a protein. Disulfide bridges Ionic bonds Hydrogen bonds Ester bond15. Which of the following solutions turn milky white upon adding ethanol and water? a) A slice of potato b) Milk c) Palm oil d) A piece of apple None a & b only a, b & c b & c only16. A condensation reaction between two amino acids forms the following bond. Ester bond Glycosidic bond Ionic bond Peptide bond17. The accepted theory of how eukaryotic cells evolved from prokaryotic cells. Darwinism Cell theory Fermentation theory Endosymbiont theory18. Which of the following is a double membrane bound organelle? Lysosomes Peroxisomes Chloroplast Ribosomes19. What are the components of a nucleotide? Pentose, amine group, Nitrogen containing organic group Phosphate group, Nitrogen containing organic base, carboxyl group Pentose, phosphate group, Nitrogen containing organic base Pentose, phosphate group, amine group20. Which of the following is a single membrane bound organelle? Peroxisomes Mitochondria Nucleus Centrioles21. Choose the correct sentences out of the following. a) All enzymes are proteins. b) Some hormones are proteins. c) Proteins are micromolecules. d) All proteins are made from different monomers. a, b & d a & b only b & d only a & d only22. A substance that speeds up a chemical reaction without being changed by the reaction. Substrate Water Catalyst Lipids23. What happens when a Biuret reagent is added to a solution of free amino acids? The solution turns milky white. The solution turns brick red. The solution turns mauve/purple. The solution remains blue.24. Select the incorrect statement about monosaccharides. They act as reducing sugars. They are soluble in water. They are sweet in taste. Few monosaccharides possess a carbonyl group.25. The fuction of internal membranes in eukaryotic cells. Controls the passage of substances. Digestion of materials from within the cell. Acts as the 'control center' Storing genetic informationTime is Up!