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A level Biology Help
United Kingdom
Приєднався 29 сер 2016
Videos that explain the content of AQA A level Biology and exam questions. The content crosses over with other exam boards too.
New videos posted regularly👩🔬
For business enquiries ONLY: alevelbiologyhelp23@gmail.com
New videos posted regularly👩🔬
For business enquiries ONLY: alevelbiologyhelp23@gmail.com
What is it like to study a Bioscience at University? Biochem&Genetics at Sheffield and Uni Q&A
In this video, I give you all an insight into what it's actually like to study on my course. Please leave a comment if you have any questions!!
www.biosnip.net/ is an excellent resource where you can sign up to a newsletter which gives you extra reading articles based on the A Level syllabus - perfect for getting those higher marks in the paper 3 essay!!!
www.biosnip.net/ is an excellent resource where you can sign up to a newsletter which gives you extra reading articles based on the A Level syllabus - perfect for getting those higher marks in the paper 3 essay!!!
Переглядів: 2 112
Відео
REQUIRED PRACTICAL 9 - AQA A LEVEL BIOLOGY
Переглядів 14 тис.2 роки тому
In this video, I give you an overview of practical 9 for AQA A Level Biology. This is included in paper 2 for the 2022 exams. I also go through an exam question relevant to the practical. Please leave a comment if you have any questions - I'd be delighted to answer them! BioSnip : www.biosnip.net/
REQUIRED PRACTICAL 6 - AQA A LEVEL BIOLOGY
Переглядів 20 тис.2 роки тому
In this video, I take you through the sixth required practical for AQA A Level Biology. I then go through an exam question related to the practical. If you have any requests for videos or questions, please leave them in the comments, I'll be delighted to answer them!
REQUIRED PRACTICAL 3 (OSMOSIS) - AQA A LEVEL BIOLOGY
Переглядів 22 тис.2 роки тому
In this video, I take you through the third required practical for AQA A Level Biology - Production of a dilution series of a solute to produce a calibration curve with which to identify the water potential of plant tissue. I also go through an exam question related to the practical. If you have any questions, please leave a comment - I'll be delighted to answer them!
MATHS SKILLS - AQA A LEVEL BIOLOGY
Переглядів 14 тис.3 роки тому
In this video, I give an overview of all the Maths Skills that you need for AQA A Level Biology. Please leave a comment if you have any questions or requests for future videos!!! :)
REQUIRED PRACTICAL 2 - AQA A LEVEL BIOLOGY
Переглядів 17 тис.3 роки тому
In this video, I take you through the second required practical for AQA A Level Biology: Preparation of stained squashes of cells from plant root tips; set-up and use of an optical microscope to identify the stages of mitosis in these stained squashes and calculation of a mitotic index. I also go through an exam questions relating to this practical. Please comment if you have any questions, I'l...
HOW TO OVERCOME THE TOUGH MARK SCHEME - AQA A LEVEL BIOLOGY
Переглядів 12 тис.3 роки тому
A bit of advice on how to overcome the tough mark scheme so that you can get as many marks as possible. I guess this is a face reveal too ;) Recommended resources: www.physicsandmathstutor.com/biology-revision/a-level-aqa/ www.aqa.org.uk/subjects/science/as-and-a-level/biology-7401-7402 www.primrosekitten.com/
REQUIRED PRACTICAL 1 (AS) - AQA A LEVEL BIOLOGY
Переглядів 37 тис.3 роки тому
In this video, I go through the variables, procedure, theory and results behind the first required practical for AQA A Level Biology : Investigation into the effect of a named variable on the rate of an enzyme-controlled reaction. I also go though an exam question based on this practical. If you have any questions, please leave a comment! :)
REQUIRED PRACTICAL EXAM QUESTIONS : WHAT COULD THEY ASK YOU? - AQA A LEVEL BIOLOGY EXAM SKILLS
Переглядів 7 тис.3 роки тому
In this video, I go through what could be asked of you in the written exams in relation to the required practicals/practical skills. Please leave a comment if you have any questions or specific requests for videos :) Time stamps are in the comments!
ESSAY TIPS - AQA A LEVEL BIOLOGY - EXAM SKILLS
Переглядів 6 тис.3 роки тому
In this video, I go through some general advice on how to approach the paper 3 essay for AQA A Level Biology and also some specifics about what the mark scheme is asking. I also go through a couple of examples. Please leave a comment if you have any questions! :)
HOW TO INTERPRET GRAPHS + TABLES - AQA A LEVEL BIOLOGY EXAM SKILLS
Переглядів 14 тис.3 роки тому
In this video, I go through some general advice on how to analyse/interpret graphs for A Level Biology. I also go through a few past exam questions. Please leave a comment if you have any questions, I'll be more than happy to answer them! :)
HOW TO EVALUATE CONCLUSIONS - AQA A Level Biology Exam Skills
Переглядів 6 тис.3 роки тому
In this video, I take you through how to answer the "evaluate conlcusions" questions for AQA A Level Biology, although this applies to other exam boards too. I also go through a couple of examples from past papers. Please leave a comment if you have any questions, I would be more than happy to answer them! :)
GENETIC FINGERPRINTING - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 10 тис.3 роки тому
In this video, I explain ALL of the content required for the "Genetic Fingerprinting" section for AQA A Level Biology. This includes: what genetic fingerprinting is, VNTRs, gel electrophoresis and DNA profiling. Time stamps are in the comments. The content in this video crosses over with other exam boards too. I also go through a few exam questions and explain their mark schemes. Please leave a...
DNA PROBES - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 14 тис.3 роки тому
In this video, I explain ALL of the content required for the "DNA Probes" section for AQA A Level Biology. This includes: what DNA probes are, how they work, why they're used and DNA hybridisation. Times stamps are in the comments. The content in this video crosses over with other exam boards too. I also go through a few exam questions and explain their mark schemes. Please leave a comment if y...
RECOMBINANT DNA TECHNOLOGY - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 31 тис.4 роки тому
RECOMBINANT DNA TECHNOLOGY - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
USING GENOME PROJECTS - AQA A LEVEL BIOLOGY
Переглядів 7 тис.4 роки тому
USING GENOME PROJECTS - AQA A LEVEL BIOLOGY
GENE EXPRESSION & CANCER - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 18 тис.4 роки тому
GENE EXPRESSION & CANCER - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
REGULATION OF TRANSCRIPTION & TRANSLATION - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 20 тис.4 роки тому
REGULATION OF TRANSCRIPTION & TRANSLATION - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
STEM CELLS - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 13 тис.4 роки тому
STEM CELLS - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
GENE MUTATIONS (A2) - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 16 тис.4 роки тому
GENE MUTATIONS (A2) - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
POPULATIONS IN ECOSYSTEMS - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 29 тис.4 роки тому
POPULATIONS IN ECOSYSTEMS - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
EVOLUTION + SPECIATION - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 19 тис.4 роки тому
EVOLUTION SPECIATION - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
POPULATION GENETICS - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 13 тис.4 роки тому
POPULATION GENETICS - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
INHERITANCE - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 53 тис.4 роки тому
INHERITANCE - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
CONTROL OF BLOOD WATER POTENTIAL - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 22 тис.4 роки тому
CONTROL OF BLOOD WATER POTENTIAL - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
CONTROL OF BLOOD GLUCOSE CONCENTRATION - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 21 тис.4 роки тому
CONTROL OF BLOOD GLUCOSE CONCENTRATION - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
PRINCIPLES OF HOMEOSTASIS + NEGATIVE FEEDBACK - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 27 тис.4 роки тому
PRINCIPLES OF HOMEOSTASIS NEGATIVE FEEDBACK - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
MUSCLE CONTRACTION - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 21 тис.4 роки тому
MUSCLE CONTRACTION - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
SYNAPTIC TRANSMISSION - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 20 тис.4 роки тому
SYNAPTIC TRANSMISSION - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
NERVE IMPULSES - AQA A LEVEL BIOLOGY + EXAM QUESTIONS RUN THROUGH
Переглядів 33 тис.4 роки тому
NERVE IMPULSES - AQA A LEVEL BIOLOGY EXAM QUESTIONS RUN THROUGH
Does this contain everything I need to know for the spec?
@@user-sl4pw3fr2k Yes :)
Do we not need to know further detail how trisomy or polyploidy occurs
watching this 2 hours before my a level bio paper 2, thanks for your help.
Same omg and I hate this topic 😢
here too 💀
Loll same
love your video really helpful thankyou
Thank you so much for your help - your style of videos are really helpful!
Thank you so much for these video ❤❤
This is the best yet channel for aqua a level bio. Revising for paper 1 ❤
Required practical 4 pls
What an amazing video
hello, is this everything you need to know for exams, also do you thibk I have time to go through all of AS content in 2 weeks and 2 days, not sure if I could
easy my a level exam is in an hour 😂
what organelle isletter M than on the first question at 20.19 seconds?
It's pointing to the cytoplasm
how are you so good at answering exam questions, i know the content but find it really difficult to apply my knowledge
It honestly gets better as you do more of them. You have to think about what they're actually asking, the topic your answer is based on, and the command word i.e. evaluate, describe, suggest etc. You get to know what key words they want you to write as you practise more!! :)
u forgot to mention amylose and amylopectin in the starch part... 6:53
You're a life saver but how can CAG be a VNTR if CAG codes for an amino acid ? because VNTRs are introns which are non coding sequences
Im so grateful for you thank you❤
(:
i dont understand why we divide 15mins by 4 wouldnt it be multiply
even 3 years on, you are extremely helpful and better than most teachers.
ONG
could u go through the other required practicals for bio?
How did you know it was a comparison question for q5 c ii?
Because it is asking about table 2 and group 1, which has made a comparison with A and B. :)
this topic is so long😪
hardest topic 100% for me
33:45 don’t u reject null hypothesis when the p value (the t value) is less than critical value
SAME thats what i thought
you reject null hypothesis when value for t exceeds critical value
Wait I'm confused. I thought that Tumour Suppressor Genes produce proteins that inhibit continuous cell growth, not division.
Hi thank you for all your help, just wanted to ask if all your topic videos are according to the specifications needs and if watching them is enough for covering content then off to exam questions ? Thank you!
Hi - yes my videos are all according to the specification so everything that you need to know!!
thanks video was very helpful
hi, I dont get how to find out the tangent at 24:33 ....?
So, basically a tangent is a straight line that "just touches" a curve and is used a calculate a gradient which in this case would give us the rate. They're used because it's very difficult to make accurate calculations with a curve. You can draw the tangent at any point on the curve and it can be any length because you'll get the same answer. To find the gradient (rate) it's just a case of dividing the y axis by the x axis. Hope this makes sense? :)
lam getting interested and want to know more. 9:30pm
what are some control variables for this experiment?
i dont know why you have so little subscribers best revision channel out there
In the very first exam question, it asks how mRNA is produced in the Nucleus. I thought you would right about Splicing as that makes mature mRNA from Pre-mRNA. However, you said you need to write about transcription, but why when in transcription Pre-mRNA is produced not mRNA????
You can write about splicing but it's mainly writing about transcription given that it's a 6 mark question (splicing doesn't have many steps so you can't get many marks on that). If you look at the mark scheme, you can write any 6 of the points there. :)
please explain, what is HA^-1 ?
Hi! It means "per hectare". A hectare is a measure of an area size. The graph is showing gross productivity in an area (as the text says) so that's why you include it in the units. Hope this helps!
at 23:53 i dont understand the answer you put in how does promotor DNA mean the sheep isn't going to be killed?
Because the DNA is obtained from milk so the sheep doesn't need to be killed to get the DNA :)
How is the rate of mutation affected by the environment? 13:14
Thank you - my teacher taught this topic today , I had no idea what’s going on … you explained it so well 🎉😊
I love this video! thank you. just a quick question, ive seen some other synapse videos and they dont mentioned acetylcholine. why is that?
Your explanations are on point I like how you explain even the smallest details really helpful
this was so helpful thank you so much
05:59 states that one of the adaptations for gas exchange in fish is that the filaments are thin increasing the rate of diffusion. doesnt the rate of diffusion decrease becuase that is what I saw in the mark scheme???
I think it increases because it’s thin so it has a shorter diffusion distance = increase rate of diffusion
hello, what about how to observe the position of starch grains in the cells when using an optical (light) microscope. I dont think it was mentioned in the video? can someone please help?
BB
wow wow wow. I love watching your videos so much. everything you say is exaclty as it is from the mark scheme. you dont include too much information only excalty what is needed specifically from the mark scheme. making it easy and simpler to understand the information without too many other points which arent even worth being mentioned. so thank you!:)
I dont get much about the ester bonds. can someone please please help me:)
at 5. on mass flow hypothesis, shouldn't it be water exit by osmosis then decreased hydrostatic pressure? it doesnt make sense to me
hi thank u so much for this video but where can i find the rest of these questions (eg: 3.1 , 3.2 , 3.3 ) so the whole question of each graph that you have explained
Isn’t the sarcoplasm the cytoplasm of muscle cells? Why does it say it’s the cell itself?
good content produced I just feel like you're reading straight off the specification and not quite explaining things in detail
for the last question could i explain the curves plateau because at higher temperatures(outside the optimal range) the hydrogen and ionic bonds in the enzymes tertiary structures are affected resulting in change in shape of active site, therefore the enzymes used in the reaction wont be able to form E-S complexes and therefore rate of reaction slows down, or does it have to be because substrate is used up.
hii amazing vid but did u mention vesicles?? i didnt hear much on it and dont know if its required knowledge lol
In the exam if you're told to describe the action of a lysosome, you would say that they fuse with a vesicle (which is what contains an engulfed foreign substance/pathogen) and release lysozyme (examiner prefers "hydrolytic enzyme" - you would still get a mark for putting lysozyme).
this was amazing