Aqa biology stuvia 2024 - Study guides, Class notes & Summaries
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AQA A Level Biology Unit 1Questions & Answers(RATED A+)
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How do biological molecules provide evidence for evolution? - ANSWERThey all have similar molecules and use the same amino acids and DNA. 
 
What are monomers of carbohydrates called? - ANSWERMonosaccharides. 
 
Beta Glucose - ANSWER 
 
Alpha glucose - ANSWER 
 
Glucose formula - ANSWERC₆H₁₂O₆ 
 
Name of the bond between monosaccharides? - ANSWERGlycosidic bond. 
 
What is sucrose made from? - ANSWERGlucose and fructose. 
 
What is lactose made from? - ANSWERGlucose and galactose. 
 
Wha...
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AQA A-Level Biology: Chapter 1 (Biological Molecules)Questions 100% Answered!!
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Monosaccharides - ANSWER- A single monomer of sugar. 
- Formula = CnH2nO6 
- Examples: Glucose, fructose, galactose. 
 
Alpha Glucose - ANSWER- Hydroxyl (OH) group on the bottom of carbon-1. 
 
Beta Glucose - ANSWER- Hydroxyl (OH) group on the top of carbon-1. 
 
Disaccharides - ANSWER- Carbohydrates that are made up of two monosaccharides. 
- Formed by a glycosidic bond through a condensation reaction. 
- Water is formed. 
- Examples: Maltose (glucose + glucose), Sucrose (glucose + fructose), L...
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A-level Biology AQA paper 1 2019 Correct 100%
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Describe how a non-competitive inhibitor can reduce the rate of an enzyme controlled reaction - ANSWERBinds away from active site 
Changes shape of active site 
So no longer complementary so less substrate can bind 
 
How to identify a competitive inhibitor - ANSWERWith the inhibitor, it increases substrate conc + doesent change rate of reaction 
 
No large lipid droplets are visible with the optical microscope in the samples from suspension A. 
Explain why - ANSWEREmulsification 
Cant be seen...
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AQA A LEVEL BIOLOGY QUESTTIONS WITH CORRECT ANSWERS!!
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the krebs cycle takes place in the _______ of the ___________ - ANSWERmatrix mitochondria 
 
epistasis - ANSWERarises when the allele of one gene affects or masks the expression of another in the phenotype 
 
autosome - ANSWERa chromosome that is not a sex chromosome 
 
biodiversity - ANSWERthe range and variety of genes, species and habitats within a particular region 
 
biomass - ANSWERthe total mass of living material, normally measured in a specific area over a given period of time 
 
intras...
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AQA A-level Biology - Topic 1A – Carbohydrates Questions With Correct Answers!!
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What are most carbohydrates, proteins and nucleic acids? - ANSWERPolymers 
 
What are polymers? - ANSWERLarge, complex molecules made up of long chains of monomers joined together 
 
What are monomers? - ANSWERSmall, basic molecular units 
 
What elements do all carbohydrates contain? - ANSWERC (carbon), H (hydrogen), and O (oxygen) 
 
What monomers are carbohydrates made from? - ANSWERMonosaccharides, such as glucose, fructose and galactose. 
 
Why is glucose a hexose sugar? - ANSWERBecause it ...
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aqa a-level biology: RP4, effect of temperature on cell membrane permeability Questions & Answers(RATED A+)
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What is the premise behind the experiment? - ANSWER- Cell surface membranes made of phospholipid bilayer > selectively permeable. This can be changed by variables like temp and solvent conc. 
- As temp increases, enzymes like transport proteins lining the membrane may denature, allowing the red pigment to leave the membrane as it is now permeable to more susbstances. 
- Membrane permeability is measured using beetroot cells, which contain a purple pigment. When membranes are more permeable, ...
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