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024 aqa as biology 7401/2 paper 2 with 150 questions and correct detailed answers (verified answers) |already graded a+|| brand new!!$17.99
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024 aqa as biology 7401/2 paper 2 with 150 questions and correct detailed answers (verified answers) |already graded a+|| brand new!!
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024 aqa as biology
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024 Aqa As Biology
024 aqa as biology 7401/2 paper 2
with 150 questions and correct
detailed answers (verified answers)
|already graded a+|| brand new!!
State the enzyme that digests stach-ANSWER-Amylase
Name the product of starch digestion-ANSWER-Maltose
State the name of 2 glands that produce amylase-ANSWER-S...
2024 aqa as biology 7401/2 paper 2
with 150 questions and correct
detailed answers (verified answers)
|already graded a+|| brand new!!
State the enzyme that digests stach-ANSWER-Amylase
Name the product of starch digestion-ANSWER-Maltose
State the name of 2 glands that produce amylase-ANSWER-Salivary
glands and pancreas
Name the enzyme that breaks down maltose-ANSWER-Maltase
State where maltase is found-ANSWER-Epithelial lining
State the products of maltose digestion-ANSWER-Glucose
Name the chemical reaction involved in digestion-ANSWER-Hydrolysis
,2|Page
Explain why maltase will only digest maltose (3)-ANSWER-Maltase
has an active site with a specific shape. Only maltose can fit. To form
enzyme-substrate complexes.
Name the bond broken in carbohydrate digestion-ANSWER-Glycosidic
Describe the full digestion of starch by enzymes (5)-ANSWER-Amylase
hydrolyses glycosidic bonds in starch to produce maltose.
Maltase hydrolyses the glycosidic bond in maltose to produce glucose
Explain how glucose is absorbed into the blood (4)-ANSWER-Sodium
ions actively transported out of cell into blood by sodium potassium
pump. Maintains concentration gradient of sodium ions between ilium
and epithelial cell. Sodium ions and glucose diffuse into the cell through
a co-transport protein. Sodium ions enter down their concentration
gradient, glucose against its concentration gradient. Glucose diffuses
into blood through carrier protein
Describe and explain how epithelial cells are adapted for absorbing
glucose/amino acids(6)-ANSWER-Micro villi;
, 3|Page
Increase surface area = more enzymes like maltase/co-transport
proteins;. So faster production/diffusion of glucose so more efficient
digestion;.
Lots of Mitochondria; to produce atp for active transport; to maintain a
concentration gradient of sodium ions
Name the enzyme that digest large polypeptides into smaller
polypeptides-ANSWER-Endopeptidase
Name the enzyme that removes terminal or end amino acids-ANSWER-
Exopeptidase
Name the enzyme that digests dipeptides-ANSWER-Dipeptidase
State where endo and exopeptidases work-ANSWER-The stomach
Activation energy-ANSWER-energy required to bring about a reaction.
The activation energy is lowered by the presence of enzymes.
active immunity-ANSWER-resistance to disease resulting from the
activities of an individual's own immune system whereby an antigen
induces plasma cells to produce antibodies.
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