AQA GCSE Biology Paper 1 topics 1-4 Exam Questions with 100% CORRECT ANSWERS LATEST 2024(A+ GRADED VERIFIED BY EXPERTS)
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AQA GCSE Biology Paper 1 topics 1-4
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AQA GCSE Biology Paper 1 Topics 1-4
Name the main organelles in an animal cell: - ANSWER > nucleus
> cytoplasm
> cell membrane
> ribosomes
> mitochondria
What organelles does a plant cell have but animal cell doesn't? - ANSWER > chloroplast
> cell wall
> vacuole
What organelles does a Ba...
AQA GCSE Biology Paper 1 topics 1-4 Exam Questions with 100% CORRECT ANSWERS LATEST 2024(A+ GRADED VERIFIED BY EXPERTS)
Name the main organelles in an animal cell: - ANSWER > nucleus > cytoplasm > cell membrane > ribosomes > mitochondria
What organelles does a plant cell have but animal cell doesn't? - ANSWER > chloroplast > cell wall
> vacuole
What organelles does a Bacteria cell have? - ANSWER > no nucleus > circular strand of DNA > rings of plasmid
> cell wall
> cell membrane
What is a eukaryotic cell? - ANSWER A cell that contains a nucleus
Give an example of a eukaryotic cell: - ANSWER > Animal cell
> Plant cell
What is a prokaryotic cell? - ANSWER Single cells of bacteria that has its DNA in a loop not inclosed in a nucleus
Give an example of a prokaryotic cell: - ANSWER > Bacteria
> Archaeans
What is the function of a chloroplast? (plant cell only) - ANSWER > photosynthesis > contain chlorophyll which absorbs light needed for photosynthesis
What is the function of cell wall? (plant cell only) - ANSWER supports the cell - strengthens it
What us the function of a vacuole? (plant cell only) - ANSWER > contains cell sap - helps to make the cell RIGID
> weak solution of sugars and salts What is the function of a nucleus? - ANSWER > contains DNA > controls the cell
What is the function of mitochondria? - ANSWER > aerobic respiration respiration transfers energy that the cell needs to work
What is the function of ribosomes? - ANSWER > proteins are made here
What is the function of cell membrane? - ANSWER > controls what goes in and out
> holds the cell together
What is the function of cytoplasm? - ANSWER > chemical reaction take place here
> contains enzymes
What is the function of a plasmid? - ANSWER They are involved in the genetic exchange
What is cell differentiation? - ANSWER The process in which cells change to become specialised to its job.
What are the types of specialised cells? (6) - ANSWER > 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? - ANSWER To get male DNA to the female DNA > specialised for reproduction
How is sperm cell specialised for its job? - ANSWER > 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? - ANSWER 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? - ANSWER > long to cover more distance > have branched connections to connect with other nerve cells
What is Axon? - ANSWER the EXTENSION of a NER VE CELL along which electrical impulses travel
What is the function of a muscle cell? - ANSWER To contract quickly
How is a muscle cell specialised for its job? - ANSWER > long = space to contract > lots of mitochondria = energy needed for contraction
What is the function of a root hair cell? - ANSWER To adsorb water , nutrients and minerals from the soil
How is a root hair cell specialised to do its job? - ANSWER > LARGE SURF ACE AREA to absorb more water form the soil
> THIN MEMBRANE so nutrients cross easily into the cell
What is the function of xylem and phloem cells? - ANSWER To transport substances ( water + food) around the plant
How are xylem and phloem specialised for their job? - ANSWER > long and join end to end = large volume
What are the advantages of a LIGHT microscope? - ANSWER > color images > easier to carry
What are the disadvantages of a LIGHT microscope? - ANSWER > limited magnification (not power enough)
> limited resolution (blurred image)
What are the advantages of an ELECTRON microscope? - ANSWER > much greater magnification > higher resolution
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