1 Key concepts in biology

Practice questions on Key concepts in biology

• Explain why glucose molecules are able to move from the small intestine into the blood eve… (4 marks, Explain)
• Compare the role of the endoplasmic reticulum and the Golgi apparatus in the processing an… (4 marks, Compare)
• Explain why enzymes can speed up reactions in living cells without being used up themselve… (4 marks, Explain)
• Explain why enzymes are described as specific, and describe what happens to enzyme activit… (4 marks, Explain)
• Explain why enzymes stop working when the temperature is increased above their optimum tem… (4 marks, Explain)
• Explain why electron microscopes have allowed scientists to understand cell structure in g… (4 marks, Explain)
• A student wants to view bacteria using a light microscope and then using an electron micro… (4 marks, Explain)
• A student uses a light microscope to view a sample of plant cells. Explain why the student… (4 marks, Explain)
• Explain why a muscle cell, on its own, cannot carry out all the functions needed to keep a… (4 marks, Explain)
• A student says: 'A multicellular organism is just a collection of cells working independen… (4 marks, Evaluate)
• Explain how cells are organised into different levels of organisation in a multicellular o… (4 marks, Explain)
• Explain why the nucleus is essential for a cell to be able to divide and produce new cells… (4 marks, Explain)
• Explain why a eukaryotic cell can carry out more complex functions than a prokaryotic cell… (4 marks, Explain)
• Explain why a cell that contains many ribosomes is able to produce large amounts of enzyme… (4 marks, Explain)
• Explain why a cell with many mitochondria is able to carry out more active transport than … (4 marks, Explain)
• Explain why the cell membrane is important for controlling what enters and leaves a cell. (4 marks, Explain)
• Explain why an enzyme works best at its optimum pH and why changing the pH above or below … (4 marks, Explain)
• Describe how the structures found in a leaf are organised to allow the leaf to carry out p… (4 marks, Describe)
• Explain how the organisation of cells into tissues and organs allows the human digestive s… (4 marks, Explain)
• A scientist is studying the internal structure of a mitochondrion. Explain why the scienti… (4 marks, Explain)