AQA GCSE Biology Paper 1 topics 1-4 Exam Questions and Answers 100% Correct

AQA GCSE Biology Paper 1 topics 1-4 Exam Questions and Answers 100% Correct Name the main organelles in an animal cell: - Answer️️ -> nucleus > cytoplasm > cell membrane > ribosomes > mitochondria What organelles does a plant cell have but animal cell doesn't? - Answer️️ -> chloroplast > cell wall > vacuole What organelles does a Bacteria cell have? - Answer️️ -> no nucleus > circular strand of DNA > rings of plasmid > cell wall > cell membrane What is a eukaryotic cell? - Answer️️ -A cell that contains a nucleus Give an example of a eukaryotic cell: - Answer️️ -> Animal cell > Plant cell What is a prokaryotic cell? - Answer️️ -Single cells of bacteria that has its DNA in a loop not inclosed in a nucleus Give an example of a prokaryotic cell: - Answer️️ -> Bacteria > Archaeans What is the function of a chloroplast? (plant cell only) - Answer️️ -> photosynthesis > contain chlorophyll which absorbs light needed for photosynthesis What is the function of cell wall? (plant cell only) - Answer️️ -supports the cell - strengthens it What us the function of a vacuole? (plant cell only) - Answer️️ -> contains cell sap - helps to make the cell RIGID > weak solution of sugars and salts What is the function of a nucleus? - Answer️️ -> contains DNA > controls the cell What is the function of mitochondria? - Answer️️ -> aerobic respiration respiration transfers energy that the cell needs to work What is the function of ribosomes? - Answer️️ -> proteins are made here What is the function of cell membrane? - Answer️️ -> controls what goes in and out > holds the cell together What is the function of cytoplasm? - Answer️️ -> chemical reaction take place here > contains enzymes What is the function of a plasmid? - Answer️️ -They are involved in the genetic exchange What is cell differentiation? - Answer️️ -The process in which cells change to become specialised to its job. What are the types of specialised cells? (6) - Answer️️ -> sperm cell > nerve cell > muscle cell > root hair cell > xylem cell > phloem cell What is the function of the sperm cell? and what is it specialised for? - Answer️️ -To get male DNA to the female DNA > specialised for reproduction How is sperm cell specialised for its job? - Answer️️ -> long tail + streamlined head for swimming to the egg > lots of mitochondria = energy > enzymes in its head to digest through the egg cell membrane What is the function of a nerve cell? And what is specialised for? - Answer️️ -To carry electric signals from one part of the body to another > specialised for rapid signalling How is the nerve cell specialised for its job? - Answer️️ -> long to cover more distance > have branched connections to connect with other nerve cells What is Axon? - Answer️️ -the EXTENSION of a NERVE CELL along which electrical impulses travel What is the function of a muscle cell? - Answer️️ -To contract quickly How is a muscle cell specialised for its job? - Answer️️ -> long = space to contract > lots of mitochondria = energy needed for contraction What is the function of a root hair cell? - Answer️️ -To adsorb water, n