AQA B2 Flashcards

Flashcards which can be printed and cut out for revision of AQA Modular Science, Biology Unit B2. These cards will test you on the majority of the syllabus exept 12.4 (food chains) and 12.5 (the carbon cycle). The answers are colour coded depending on the topic. Colour codes are as follows

Green- Photosyntesis, Osmosis, Green Plants

Purple- Enzymes

Red- Homeostastis- The Control Of Internal Body Conditions

Blue- Decay

Hope you find these Helpful.

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In cells, what occurs in the In cells, what occurs in the Describe the purpose of a cell Where do most of the chemical Describe the purpose of
Ribosomes? mitochondria? wall. reactions take place in a cell? chloroplasts in a plant cell.
Protein- Synthesis Most energy is released here To let things in and out of the Cytoplasm Chloroplasts absorb light energy
during respiration. cell. to make food.
What are the chemical How does oxygen required for What is the equation for Name some factors affecting What are nitrates needed for
reactions inside cells controlled respiration pass through cell respiration? the rate of photosynthesis. in plants and what are the
by? membranes? symptoms of deficiency?
Carbon dioxide + water (+light -Temperature
Enzymes Diffusion energy) --- glucose+ oxygen -Light For producing amino acids
-Carbon dioxide which are used to form
proteins. (deficiency, stunted
What is magnesium needed for Why do materials decay? Name an advantage of the What are biological catalysts? What are enzymes made up of?
in plants and what are the decay process.
symptoms of deficiency? They are broken down Enzymes Long chains of amino acids,
(digested) by micro- organisms It releases substances which folded to form a unique shape
For chlorophyll production. plants need to grow. which allows the enzymes to
(deficiency, yellowed leaves) react with certain molecules.
What happens when an What can affect the efficiency Name the 5 types of enzyme. What type of enzyme can What reaction does the
enzyme becomes denatured? of enzymes? convert glucose into fructose? enzyme Amylase catalyse?
Carbohydrates, Lipases,
The enzyme changes shape, Temperature, PH values. Proteases, Amylase, Isomerase. Isomerase. Breakdown of sugars into starch
altering its unique shape Enzymes can become (in the mouth and small
designed to allow it to react. denatured at temperatures intestine)
(lowers rate of reaction) about 40oc

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What reactions do protease What reactions do lipase In what conditions do enzymes Where is Bile produced & In what conditions do enzymes
enzymes catalyse? enzymes catalyse? in the stomach work best in? stored and then released? in the small intestine work best
Breakdown of proteins into Breakdown of Lipids (fats & oils) Acid conditions. The stomach Produced: the Liver
amino acids (stomach & small produces Hydrochloric acid to Stored: Gall Bladders Alkaline conditions.
intestine) provide these conditions.…read more

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Which organ produces insulin What causes the Illness How can Diabetes be treated?
and how does it work? Diabetes?
By careful attention to diet and
The pancreas. Insulin allows The pancreas does not produce injecting insulin into the body.
glucose to move from blood into enough insulin- causing blood
the cells, therefore reducing sugar levels to rise dangerously
blood sugar levels.…read more


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