AQA A Level Biology Unit 1 questions and
answers 100% verified.
How do biological molecules provide evidence for evolution? - correct answer. They
all have similar molecules and use the same amino acids and DNA.
What are monomers of carbohydrates called? - correct answer. Monosaccharides.
Beta Glucose - correct answer.
Alpha glucose - correct answer.
Glucose formula - correct answer. C₆H₁₂O₆
Name of the bond between monosaccharides? - correct answer. Glycosidic bond.
What is sucrose made from? - correct answer. Glucose and fructose.
What is lactose made from? - correct answer. Glucose and galactose.
What is maltose made from? - correct answer. Two alpha glucose.
Testing for reducing sugars? - correct answer. Add Benedict's reagent (blue) and heat
in a water bath at a boil. If present: Green → yellow → orange → brick red
Test for non-reducing sugars? - correct answer. Add dilute hydrochloric acid and heat,
neutralise with Sodium Hydrogencarbonate and add Benedicts reagent.
, What 3is 3the 3scientific 3name 3for 3carbohydrates? 3- 3 correct 3answer. Polysaccharides.
What 3is 3starch 3made 3of? 3- 3 correct 3answer. Starch 3is 3a 3mixture 3of 3two
3polysaccharides 3of 3alpha 3glucose: 3Amylose 3and 3amylopectin.
What 3is 3amylose? 3- 3 correct 3answer. A 3long, 3unbranched 3alpha 3glucose 3chain.
3The 3angles 3in 3it 3make 3it 3have 3a 3coiled 3shape 3which 3makes 3it 3compact 3and
3effective 3for 3storage.
What 3is 3amylopectin? 3- 3 correct 3answer. 3 A 3long, 3braqnched 3alpha 3glucose 3chain.
3The 3side 3branches 3mean 3that 3enzymes 3can 3get 3to 3and 3hydrolise 3glycosidic 3bonds
3faster 3so 3glucose 3can 3be 3released 3quickly.
What 3is 3glycogen? 3- 3 correct 3answer. 3 A 3polysaccharide 3of 3alpha 3glucose 3with 3a
3similar 3structure 3to 3starch 3except 3it 3is 3more 3branched, 3allowing 3even 3faster 3energy
3release. 3It 3is 3also 3very 3compact.
What 3is 3celluose? 3- 3 correct 3answer. 3 it 3is 3made 3of 3long. 3straight 3chains 3of 3beta
3glucose. 3The 3chains 3are 3linked 3my 3hydrogen 3bonds 3to 3form 3microfibrils, 3a 3strong 3fibre.
3The 3strong 3fibres 3allow 3it 3to 3provide 3structural 3support 3in 3cells 3as 3cell 3walls.
How 3to 3test 3for 3starch. 3- 3 correct 3answer. Add 3iodine 3which 3is 3dissolved 3in
3potassium 3iodie 3ti 3the 3sample. 3Positive 3result: 3Turns 3blue-black. 3Negative 3result:
3stays 3browny- 3orange.
Which 3of 3proteins, 3polysaccharides 3and 3lipids 3are 3not 3a 3polymer. 3- 3 correct 3answer.
3Lipids.
What 3are 3triglycerides 3made 3of? 3- 3 correct 3answer. Glycerol 3and 3fatty 3acids.
What 3causes 3lipids 3to 3be 3insoluble 3in 3water? 3- 3 correct 3answer. 3 The 3hydrophobic
3fatty 3acid 3tails.
What 3is 3the 3structure 3of 3a 3fatty 3acid? 3- 3 correct 3answer.
What 3do 3double 3bonds 3cause 3in 3fatty 3acids? 3- 3 correct 3answer. A 3kink 3in 3the 3chain.
Triglyceride 3formation? 3- 3 correct 3answer.
3
What 3are 3phospholipids? 3- 3 correct 3answer. Similar 3to 3triglycerides, 3but 3one 3of 3the
3fatty 3acid 3tails 3is 3replaced 3by 3a 3phosphate 3group 3head.
Which 3part 3of 3a 3phospholipid 3is 3hydrophillic 3and 3which 3part 3is 3hydrophobic? 3-
3 correct 3answer. The 3phosphate 3group 3is 3hydrophillic 3and 3the 3fatty 3acid 3tail 3is
3hydrophobic.
answers 100% verified.
How do biological molecules provide evidence for evolution? - correct answer. They
all have similar molecules and use the same amino acids and DNA.
What are monomers of carbohydrates called? - correct answer. Monosaccharides.
Beta Glucose - correct answer.
Alpha glucose - correct answer.
Glucose formula - correct answer. C₆H₁₂O₆
Name of the bond between monosaccharides? - correct answer. Glycosidic bond.
What is sucrose made from? - correct answer. Glucose and fructose.
What is lactose made from? - correct answer. Glucose and galactose.
What is maltose made from? - correct answer. Two alpha glucose.
Testing for reducing sugars? - correct answer. Add Benedict's reagent (blue) and heat
in a water bath at a boil. If present: Green → yellow → orange → brick red
Test for non-reducing sugars? - correct answer. Add dilute hydrochloric acid and heat,
neutralise with Sodium Hydrogencarbonate and add Benedicts reagent.
, What 3is 3the 3scientific 3name 3for 3carbohydrates? 3- 3 correct 3answer. Polysaccharides.
What 3is 3starch 3made 3of? 3- 3 correct 3answer. Starch 3is 3a 3mixture 3of 3two
3polysaccharides 3of 3alpha 3glucose: 3Amylose 3and 3amylopectin.
What 3is 3amylose? 3- 3 correct 3answer. A 3long, 3unbranched 3alpha 3glucose 3chain.
3The 3angles 3in 3it 3make 3it 3have 3a 3coiled 3shape 3which 3makes 3it 3compact 3and
3effective 3for 3storage.
What 3is 3amylopectin? 3- 3 correct 3answer. 3 A 3long, 3braqnched 3alpha 3glucose 3chain.
3The 3side 3branches 3mean 3that 3enzymes 3can 3get 3to 3and 3hydrolise 3glycosidic 3bonds
3faster 3so 3glucose 3can 3be 3released 3quickly.
What 3is 3glycogen? 3- 3 correct 3answer. 3 A 3polysaccharide 3of 3alpha 3glucose 3with 3a
3similar 3structure 3to 3starch 3except 3it 3is 3more 3branched, 3allowing 3even 3faster 3energy
3release. 3It 3is 3also 3very 3compact.
What 3is 3celluose? 3- 3 correct 3answer. 3 it 3is 3made 3of 3long. 3straight 3chains 3of 3beta
3glucose. 3The 3chains 3are 3linked 3my 3hydrogen 3bonds 3to 3form 3microfibrils, 3a 3strong 3fibre.
3The 3strong 3fibres 3allow 3it 3to 3provide 3structural 3support 3in 3cells 3as 3cell 3walls.
How 3to 3test 3for 3starch. 3- 3 correct 3answer. Add 3iodine 3which 3is 3dissolved 3in
3potassium 3iodie 3ti 3the 3sample. 3Positive 3result: 3Turns 3blue-black. 3Negative 3result:
3stays 3browny- 3orange.
Which 3of 3proteins, 3polysaccharides 3and 3lipids 3are 3not 3a 3polymer. 3- 3 correct 3answer.
3Lipids.
What 3are 3triglycerides 3made 3of? 3- 3 correct 3answer. Glycerol 3and 3fatty 3acids.
What 3causes 3lipids 3to 3be 3insoluble 3in 3water? 3- 3 correct 3answer. 3 The 3hydrophobic
3fatty 3acid 3tails.
What 3is 3the 3structure 3of 3a 3fatty 3acid? 3- 3 correct 3answer.
What 3do 3double 3bonds 3cause 3in 3fatty 3acids? 3- 3 correct 3answer. A 3kink 3in 3the 3chain.
Triglyceride 3formation? 3- 3 correct 3answer.
3
What 3are 3phospholipids? 3- 3 correct 3answer. Similar 3to 3triglycerides, 3but 3one 3of 3the
3fatty 3acid 3tails 3is 3replaced 3by 3a 3phosphate 3group 3head.
Which 3part 3of 3a 3phospholipid 3is 3hydrophillic 3and 3which 3part 3is 3hydrophobic? 3-
3 correct 3answer. The 3phosphate 3group 3is 3hydrophillic 3and 3the 3fatty 3acid 3tail 3is
3hydrophobic.
