Biology (A) 9BN0/02 May June 2021

Edexcel A Level Biology A (9BN0) Jun 2021

معلم موافق رایگان بودن است.

1. Comparative Genomics of Archaea and Eukaryota: Relationship between Archaea and Eukaryota based on genetic transcription factors, methionine usage, and antibiotic resistance.

2. Genetic Variation in Meiosis and Fertilization: Mechanisms generating diversity through crossing over, independent assortment, and the role of vesicles in preventing polyspermy.

3. Circulatory System and Oxygen Transport: Differences in oxygen diffusion efficiency in small vs. large aquatic organisms, effects of congenital heart defects on oxygen supply.

4. Cardiovascular Disease and Blood Pressure: Impact of hypertension on artery damage, atherosclerosis progression, and cardiovascular risk factors.

5. Genetic Engineering in Alfalfa for Spider Silk: Role of enzymes in recombinant DNA technology, antibiotic selection for transformed bacteria, and ethical concerns of genetically modified plants.

6. Muscle Physiology and Athletic Performance: Structural differences between slow and fast-twitch fibers, adaptations in tendon tissue after ligament injury, and energy demands in triathlon events.