mocks Flashcards
Glucose and fructose are different sugars.
Fructose has a much sweater taste than glucose.
suggest 2 reasons why the drinks company uses fructose in the drinks rather than glucose
Fructose is sweeter, so less is needed, reducing costs.
It lowers the calorie content of the drink, making it more appealing to health-conscious consumers.
describe how a student could test for sugar
give the colour of a positive result
test = benedict’s solution
colour = yellow, green or brick red
describe how a student could test for protein
give the colour of a positive result
test = Biuret test
colour = purple
The human Digestive system breaks down protein and far in the drink
describe how protein and fat are digested
You should include
the enzymes involved
where the enzymes are produced
The human digestive system breaks down protein and fat using specific enzymes. Proteins are broken down into amino acids by the enzyme protease, which is produced in the stomach, pancreas, and small intestine. Fats (lipids) are broken down into fatty acids and glycerol by the enzyme lipase, produced in the pancreas and small intestine. Additionally, bile, made in the liver and stored in the gallbladder, emulsifies fats, increasing their surface area to help lipase work more efficiently.
The student dried the outside of each tube with a paper towel before recording the mass
why was it important to dry the tubes?
to ensure accurate mass measurements by removing excess moisture that could affect the mass of the tubes
What type of microorganism causes measles?
virus
Suggest two ways the spread of measles can be reduced
good hygiene by washing hands
Isolating infected individuals to prevent contact with others.
Describe how the measles vaccine helps a person to become immune to measles pathogen
The measles vaccination contains a weakened form of the virus stimulating the immune system to produce antibodies. It activates memory cells that provide a rapid response to future exposure to the measles virus.
Explain how viruses can cause illness
Viruses causes illness by invading host cells replicating within them and causing cell damage or death which triggers an immune response.
Drugs can help to reduce the symptoms of norovirus infection new drugs must go through clinical trials before being licenced for use
three reasons why clinical trials are needed
To ensure the drug is safe for humans by identifying any harmful side effects.
To test the drug’s effectiveness in treating the symptoms of norovirus.
To determine the correct dosage that provides the best balance of effectiveness and safety.
What’s the symbol equation for photosynthesis
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
The mean temperature of the greenhouse is 15 degrees Celsius
a heater would keep the temperature of the greenhouse at 25 degrees Celsius
Suggest two reasons against using a heater set at twenty five degrees Celsius in the greenhouse
do not refer to cost in your answer
Excessive heat stress on plant increased risk of diseases
The person cut a stem from one of the tomato plants
The cut stem was placed in soil to grow new roots
which tissue in the cut stem will differentiate into new root cells?
meristem
Electron microscope
Three dimensional view
high resolution
Give three ways that a prokaryotic cell is different from a eukaryotic cell
Prokaryotic cells do not have a nucleus; their DNA is free in the cytoplasm, while eukaryotic cells have a nucleus containing their DNA.
Prokaryotic cells lack membrane-bound organelles (e.g., mitochondria, chloroplasts), while eukaryotic cells have them.
Prokaryotic cells are generally smaller in size compared to eukaryotic cells.
Why would a person who doesn’t smoke breathe much faster during exercise than someone who does smoke and has ruined their alveolus
A non-smoker breathes faster during exercise to meet the increased oxygen demand of their muscles. A smoker with damaged alveoli (due to conditions like emphysema) has reduced surface area for gas exchange, leading to lower oxygen uptake. This forces the smoker’s body to work harder, but they can’t efficiently supply oxygen, resulting in slower breathing adaptation.
Explain the causes and symptoms of angina and how GTN reduces the symptoms of a angina
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Angina is caused by reduced blood flow due to narrowed coronary arteries leading to symptoms like chest pain and tiredness
GTN reduces these symptoms by widening the coronary arteries improving blood flow and oxygen delivery to the heart.
