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Students placed some grass cuttings in a vacuum flask and attached a carbon dioxide sensor. Why would the carbon dioxide levels increase over a period of 20 days?

The decomposing microorganisms that contribute to the decay of the grass must respire and respiration leads to the production and release of carbon dioxide.
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Answered by Georgia B. • Biology tutor
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Describe the similarities and differences between RNA and DNA

Similarities: both encode genetic information; both can bind nitrogenous bases adenine, guanine and cytosine; both are polar and have a 5' end and a 3' endDifferences: RNA binds uracil, whereas DNA binds thy...
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Answered by Conlan D. • Biology tutor
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Maltose is hydrolysed by the enzyme maltase. Explain why maltase catalyses only this reaction.

The active site of the enzyme has a specific active site that is complementary to maltose. This means that maltose can only bind to maltase to form an enzyme-substrate complex.
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Answered by Chloe B. • Biology tutor
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How does a transmembrane protein transport a molecule against the concentration gradient (2)

The transmembrane protein transport a molecule against the concentration by active transport (1) which requires ATP (1) .
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Answered by Bonnie M. • Biology tutor
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Describe the process of semi-conservative replication and why is it so important?

The process of DNA replication involves unwinding the original DNA strand by the enzyme DNA helicase . This enzyme breaks the hydrogen bonds between complimentary bases forming two single strands of DNA. Eac...
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Answered by Neha M. • Biology tutor
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