AQA 2023 Question Paper & ANSWERS [VERIFIED]
AQA 2023 Question Paper & ANSWERS [VERIFIED] When a nerve impulse arrives at a synapse, it causes the release of neurotransmitter from vesicles in the presynaptic knob. Describe how - ANS nerve impulse causes calcium ion channels to open calcium ions enter by facilitated diffusion causes synaptic vesicles to fuse with presynaptic membrane Use your knowledge of how myosin and actin interact to suggest how the myosin molecule moves the mitochondrion towards the presynaptic membrane - ANS myosin head attaches to actin and performs powerstroke this pulls mitochondria along the actin next myosin head attaches to actin and performs powerstroke This movement of mitochondria happens when nerve impulses arrive at the synapse. Suggest and explain one advantage of the movement of mitochondria towards the presynaptic membrane when nerve impulses arrive at the synapse - ANS mitochondria supply ATP for active transport of ions Give two examples of biological molecules containing nitrogen that would be removed when a crop is harvested - ANS DNA proteins Outline a method ecologists could use to determine plant species richness at one site - ANS grid with coordinates selected using random number generator use of quadrat identify plant species in each quadrat
Información del documento
- Subido en
- 25 de febrero de 2024
- Número de páginas
- 1
- Escrito en
- 2023/2024
- Tipo
- Examen
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- Preguntas y respuestas
