Sharika S.

Sharika S.

£20 - £25 /hr

Medicine (Other) - University College London University

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3 completed lessons

About me

Hi! I'm Sharika and I'm currently studying medicine at University College London. Having thoroughly enjoyed the sciences throughout school I took Biology, Maths and Chemistry at A Level and achieved A*A*A respectively. Aspiring to undertake a challenging career that would encompass both my passion for science and my desire to help others, I chose to study medicine.

Having been through the difficult admissions process whilst balancing the stress of A Levels, I know just how tough it can be to do well in both! As your tutor, I am happy to help you with both the academic side of things as well as all the rest of it (personal statements, interview prep, etc.). Having secured offers for 3 medical schools, I think I know the system pretty well!

If you're just looking for academic help in either Biology, Chemistry or Maths, that's fine too- my interest in the sciences isn't limited to the things only relevant to the medical field. Having had hours of experience tutoring, I can cater for your individual needs, whatever they may be!

Hi! I'm Sharika and I'm currently studying medicine at University College London. Having thoroughly enjoyed the sciences throughout school I took Biology, Maths and Chemistry at A Level and achieved A*A*A respectively. Aspiring to undertake a challenging career that would encompass both my passion for science and my desire to help others, I chose to study medicine.

Having been through the difficult admissions process whilst balancing the stress of A Levels, I know just how tough it can be to do well in both! As your tutor, I am happy to help you with both the academic side of things as well as all the rest of it (personal statements, interview prep, etc.). Having secured offers for 3 medical schools, I think I know the system pretty well!

If you're just looking for academic help in either Biology, Chemistry or Maths, that's fine too- my interest in the sciences isn't limited to the things only relevant to the medical field. Having had hours of experience tutoring, I can cater for your individual needs, whatever they may be!

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About my sessions

Having been in your position before, there was nothing more frustrating than being stuck on something in the specification and feeling like you'll never be able to understand it. Don't worry! This happens to the best of us at some point or the other! Reading something over and over again rarely works- I will make sure that the focus of our lessons is to go over the topics you are most concerned about, and work through them in various ways until you get it. When it comes to Biology and Chemistry- application is everything, so I will be testing you to ensure that what we're discussing does really make sense to you! My general lesson plan will be to go through approximately 3 points each session that you are struggling with, then we will go through questions relevant to the topics at the end. There will of course be plenty of opportunities for you to ask questions as well!

Having been in your position before, there was nothing more frustrating than being stuck on something in the specification and feeling like you'll never be able to understand it. Don't worry! This happens to the best of us at some point or the other! Reading something over and over again rarely works- I will make sure that the focus of our lessons is to go over the topics you are most concerned about, and work through them in various ways until you get it. When it comes to Biology and Chemistry- application is everything, so I will be testing you to ensure that what we're discussing does really make sense to you! My general lesson plan will be to go through approximately 3 points each session that you are struggling with, then we will go through questions relevant to the topics at the end. There will of course be plenty of opportunities for you to ask questions as well!

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Personally interviewed by MyTutor

We only take tutor applications from candidates who are studying at the UK’s leading universities. Candidates who fulfil our grade criteria then pass to the interview stage, where a member of the MyTutor team will personally assess them for subject knowledge, communication skills and general tutoring approach. About 1 in 7 becomes a tutor on our site.

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20/08/2018

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Qualifications

SubjectQualificationGrade
MathsA-level (A2)A*
BiologyA-level (A2)A*
ChemistryA-level (A2)A

General Availability

MonTueWedThuFriSatSun
Pre 12pm
12 - 5pm
After 5pm

Pre 12pm

12 - 5pm

After 5pm
Mon
Tue
Wed
Thu
Fri
Sat
Sun

Subjects offered

SubjectQualificationPrices
BiologyA Level£22 /hr
ChemistryA Level£22 /hr
BiologyGCSE£20 /hr
ChemistryGCSE£20 /hr
MathsGCSE£20 /hr
Medical School PreparationMentoring£22 /hr
Personal StatementsMentoring£22 /hr
BMAT (BioMedical Admissions)University£25 /hr
UCATUniversity£25 /hr

Questions Sharika has answered

Compare and explain the reactivity of alkanes and alkenes

Alkanes are less reactive in comparison to alkenes, this is because alkanes only have C-C and C-H sigma (σ) bonds, whereas alkenes contain both C-C, C-H in addition to at least one C=C which have have a sigma (σ) and a pi (π) bond. Sigma bonds occur as a result of the direct overlap of s orbitals and thus have high bond enthalpies, whereas pi bonds occur as a result of the sideways overlap of p orbitals (above and below the carbon ring). This means pi electron densities are spread out causing less electrostatic attraction between nuclei and electrons so there is a lower bond enthalpy. Thus less energy is needed to break pi bonds than sigma bonds and alkenes will react more easily than alkanes.Alkanes are less reactive in comparison to alkenes, this is because alkanes only have C-C and C-H sigma (σ) bonds, whereas alkenes contain both C-C, C-H in addition to at least one C=C which have have a sigma (σ) and a pi (π) bond. Sigma bonds occur as a result of the direct overlap of s orbitals and thus have high bond enthalpies, whereas pi bonds occur as a result of the sideways overlap of p orbitals (above and below the carbon ring). This means pi electron densities are spread out causing less electrostatic attraction between nuclei and electrons so there is a lower bond enthalpy. Thus less energy is needed to break pi bonds than sigma bonds and alkenes will react more easily than alkanes.

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2 months ago

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How is a nervous impulse transmitted between neurones?

Nervous impulses are transmitted through neurones via the propagation of a series of action potentials, and to be relayed across to a different neurone they must pass through the junction between known as the synapse. The first neurone (from which the impulse is travelling from) is he presynaptic neurone and the second (where the impulse is travelling to) is the postsynaptic neurone.The region near the 'end' of the presynaptic neurone is known as the presynaptic knob/bulb, when an action potential reaches this region the influx of Na+ ions causes changes in the voltage. This triggers voltage-gated Ca2+ channels to open, and Ca2+ flows into the neurone. This causes vesicles containing the neurotransmitter Acetylcholine ACh to travel and fuse to the presynaptic membrane and the ACh is released via exocytosis into the synaptic cleft- the gap between the two neurones. ACh travels across the synaptic cleft and binds to complementary receptors on the postsynaptic membrane. The receptor is a Na+ ion channel, and the binding of 2 ACh molecules to 1 receptor opens the channel to allow the flow of Na+ into the cell, depolarising it. Granted that enough Na+ flows in to meet threshold potential (between -50mV and -55mV), a subsequent action potential will be generated and the impulse will continue to be propagated. Nervous impulses are transmitted through neurones via the propagation of a series of action potentials, and to be relayed across to a different neurone they must pass through the junction between known as the synapse. The first neurone (from which the impulse is travelling from) is he presynaptic neurone and the second (where the impulse is travelling to) is the postsynaptic neurone.The region near the 'end' of the presynaptic neurone is known as the presynaptic knob/bulb, when an action potential reaches this region the influx of Na+ ions causes changes in the voltage. This triggers voltage-gated Ca2+ channels to open, and Ca2+ flows into the neurone. This causes vesicles containing the neurotransmitter Acetylcholine ACh to travel and fuse to the presynaptic membrane and the ACh is released via exocytosis into the synaptic cleft- the gap between the two neurones. ACh travels across the synaptic cleft and binds to complementary receptors on the postsynaptic membrane. The receptor is a Na+ ion channel, and the binding of 2 ACh molecules to 1 receptor opens the channel to allow the flow of Na+ into the cell, depolarising it. Granted that enough Na+ flows in to meet threshold potential (between -50mV and -55mV), a subsequent action potential will be generated and the impulse will continue to be propagated.

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2 months ago

5 views

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