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Biology AQA B2&B3 Question Game 10th June 2016

So someone asks a question and the person below answer and also asks another question to the person below to answer

I'll start: What is the main job of a leaf mesophyll cell? (1 mark)

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Original post by hafsa473
So someone asks a question and the person below answer and also asks another question to the person below to answer

I'll start: What is the main job of a leaf mesophyll cell? (1 mark)


spongy mespophll has air sacs for the diffusion of co2 and oxygen
palisade mespohll has lots of chloroplasts to trap light for photosynthesis.( dis is the right answer, above is just extra)

how does a gene code for a specific protein?
(edited 7 years ago)
Bile is produced in the liver, stored in the gall bladder, then released into the small intestine. Explain how bile affects the digestion of food in the small intestine. (2 marks)
Original post by hafsa473
Bile is produced in the liver, stored in the gall bladder, then released into the small intestine. Explain how bile affects the digestion of food in the small intestine. (2 marks)


emulsifies large fat molecules into smaller ones , providing a larger surface area for lipase to act upon, and neutralises stomach acid and produces an optimum alkaline solution in the small intestine for lipase to act upon
Original post by ihatehannah
spongy mespophll has air sacs for the diffusion of co2 and oxygen
palisade mespohll has lots of chloroplasts to trap light for photosynthesis.

how does a gene code for a specific protein?


by amino acids ordered together? Im not sure
Original post by hafsa473
by amino acids ordered together? Im not sure


By specifying the order in which the amino acids are joined together. There are 20 amino acids
Original post by hafsa473
by amino acids ordered together? Im not sure


ye , specific combination of amino acids joined together form a specific protein.
How does the iron lung work in comparison to how ventilators work now?
What is a disadvantage of taking a drug that suppresses the immune system( b3, 1 mark)
How are biofuels made?
There is a large amount of evidence that evolution is taking place. Scientists are uncertain about how life started on Earth.Explain why. (2 marks)
Original post by ihatehannah
What is a disadvantage of taking a drug that suppresses the immune system( b3, 1 mark)


It can cause side effects and the body/immune system is weaker so it's easier to get an infection/disease.
Original post by siobhanx13
How does the iron lung work in comparison to how ventilators work now?


negative pressure system, a vaccum causes the thorax to expand and air to be sucked in, then the vaccum is released and the thorax relaxes and ribcage moves inwards and then you exhale, now I think they just mechanically force the air into your lungs using a tube.
Original post by hafsa473
There is a large amount of evidence that evolution is taking place. Scientists are uncertain about how life started on Earth.Explain why. (2 marks)


early organisms were soft bodied so their skin decayed, and fossils may have been destroyed by geological activities.
Original post by siobhanx13
How are biofuels made?


from plant material
Original post by siobhanx13
It can cause side effects and the body/immune system is weaker so it's easier to get an infection/disease.


ye
Explain the cause of diabetes and how it is controlled. (3 marks)
Original post by hafsa473
There is a large amount of evidence that evolution is taking place. Scientists are uncertain about how life started on Earth.Explain why. (2 marks)


Because many organisms that were around millions of years ago were soft bodied so have decayed and fossils that were around had been destroyed by geological activity, causing a lack/ loss of fossils.
Original post by ihatehannah
What is a disadvantage of taking a drug that suppresses the immune system( b3, 1 mark)


Your immune system becomes weaker so your body is more prone to infections
Original post by hafsa473
Explain the cause of diabetes and how it is controlled. (3 marks)


pancreas can't produce enough insulin to control glucose levels reaching dangerous levels, can be controlled by injecting insulin at meal times , exercising more and monitor your diet.

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