IB HL Biology Paper 1: Questions and Answers. Verified for new updates

1. What features of a cell favour efficient removal of waste products? Surface area: Volume: A. high high B. high low C. low high D. low low - AnsB. high low 2. What is formed from glucose during anaerobic cell respiration? A. Lactate and ATP in cytoplasm B. Carbon dioxide and water in mitochondria C. Lactate and carbon dioxide in mitochondria D. Carbon dioxide and water in cytoplasm - AnsA. Lactate and ATP in cytoplasm 3. Enzymes produced by the pancreas could pass out of the body via the anus. Which route would these enzymes take to do this? A. pancreas -> liver -> small intestine -> rectum -> anus B. pancreas -> gall bladder -> small intestine -> large intestine -> anus C. pancreas -> small intestine -> large intestine -> anus D. pancreas -> large intestine -> small intestine -> anus - AnsC. pancreas -> small intestine -> large intestine -> anus 4. What initiates an action potential along a neuron? A. Potassium and sodium ions diffuse out of a neuron B. Potassium and sodium ions diffuse into a neuron C. Neurotransmitters cause depolarization of membrane D. Acetylcholinesterase breaks down acetylcholine - AnsC. Neurotransmitters cause depolarization of membrane 5. Why does shivering occur? A. The body cannot control muscles when they become cold B. Shivering informs the brain that the body is too cold C. Shivering generates heat and raises body temperature D. The body diverts blood away from skin reducing heat loss - AnsC. Shivering generates heat and raises body temperatur