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Explain why DNA replication is considered semi-conservative.

DNA requires one template strand that is conserved, in order for the nitrogenous bases to order themselves correctly in the new polynucleotide chain. This relies on the complimentary base pairing C-G and A-T...
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Describe the lock and key theory in reference to the enzyme Amylase

The lock and key theory suggests that there is a complimentary shaped substrate that will fit exactly into the specific shape of the enzyme's active site. In this case, amalyase is the enzyme and the substra...
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Answered by Alexander G. • Biology tutor
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Outline how a student could identify between an aldehyde and a ketone, and state the result they would observe.

There are two possible answers here. 1) Add Tollens reagent - the student would see a silver mirror form in the test tube containing the aldehyde. 2) Add Benedicts reagent - te student would see a brick red ...
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Which homologous series has the general formula CnH2n+2?

The answer to this question is the alkane series. You can work this out using the following method: Becuase each carbon must make four bonds to complete it outer shell of electrons, there must be double the ...
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Answered by Alexander G. • UCAT tutor
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Two particles A and B of mass 2kg and 3kg respectively are moving head on. A is moving at 5m/s and B is moving at 4m/s. After the collision, A rebounds at 4m/s. What is the speed of B and what direction is it moving in?

Using conservation of momentum, m1u1 + m2u2 = m1v1 + m2v2, set m1 = 2kg, m2 = 3kg, u1 = 5m/s, u2 = -4m/s and v1 = -4m/s. Substitute these into the equation to get 2 5 + 3 (-4) = 2*(-4) + 3*v2 10 - 12 = -8 +3...
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Answered by Amber S. • Maths tutor
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