This topic is included in A Level Paper 1 and Paper 3 for OCR Biology A.

Notes:

• 5.1. Communication and Homeostasis
• 5.2. Energy for Biological Processes

Questions by Topic:

5.1 Communication and Homeostasis

• Communication and Homeostasis MS
• Communication and Homeostasis QP
• Excretion 1 MS
• Excretion 1 QP
• Excretion 2 MS
• Excretion 2 QP
• Excretion 3 MS
• Excretion 3 QP
• Hormonal Communication 1 MS
• Hormonal Communication 1 QP
• Hormonal Communication 2 MS
• Hormonal Communication 2 QP
• Hormonal Communication 3 MS
• Hormonal Communication 3 QP
• Neuronal Communication 1 MS
• Neuronal Communication 1 QP
• Neuronal Communication 2 MS
• Neuronal Communication 2 QP
• Plant and Animal Responses 1 MS
• Plant and Animal Responses 1 QP
• Plant and Animal Responses 2 MS
• Plant and Animal Responses 2 QP
• Plant and Animal Responses 3 MS
• Plant and Animal Responses 3 QP
• Plant and Animal Responses 4 MS
• Plant and Animal Responses 4 QP

5.2 Energy for Biological Processes

• Photosynthesis 1 MS
• Photosynthesis 1 QP
• Photosynthesis 2 MS
• Photosynthesis 2 QP
• Respiration 1 MS
• Respiration 1 QP
• Respiration 2 MS
• Respiration 2 QP
• Respiration 3 MS
• Respiration 3 QP