AQA AS BIOLOGY EXAMPREP REVIEW SHEET WITH TESTED QUESTIONS AND COMPLETE SOLUTIONS

AQA AS BIOLOGY EXAMPREP REVIEW
SHEET WITH TESTED QUESTIONS AND
COMPLETE SOLUTIONS

●● Plant cells include:
Answer: Cell wall, Permanent Vacuole, Chloroplasts


●● What do ribosomes do?
Answer: synthesize protein


●● What do mitochondria do?
Answer: Where aerobic respiration occurs


●● Equation for magnification
Answer: magnification = image size / real size


●● All specialised cells and their specific functions
Answer: Sperm (reproduction), Nerve (rapid signalling), Muscle
(contraction), Root hair (absorbing water and minerals), Phloem and
Xylem (transporting substances)


●● Stem cell use in medacine

, Answer: Bone marrow transplant can replace faulty blood cells,
embryonic cells can create insulin and nerve cells


●● Diffusion
Answer: High to low concentration


●● Osmosis
Answer: Water molecules from high to low concentration


●● Active transport
Answer: Low to high concentration, requires energy


●● Basic defintion of an enzyme
Answer: A biological catalyst which increases the speed of a reaction
without being used up in the reaction. Works with the lock and key
method where only specific substrates can bind to specific enzmes


●● Amylase
Answer: -Breaks down starch into maltose/dextrin
-Produced in the slaivary glands, pancreas and small intestine


●● Protease
Answer: -Breaks down proteins into Amino acids