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Most Important topics for CBSE 12th Biology : Syllabus, NCERT Syllabus and Topics for CBSE Exams

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  • By Tutor Chahiye

  • CBSE 12th

  • 01 Jul, 2025

 

Most Important topics for CBSE 12th Biology : Syllabus, NCERT Syllabus and Topics for CBSE Exams




 

I have prepared it for you in which I have given a list of important topics chapter wise and these topics are literally very important and if almost all the topics in a chapter have correct questions, then I have told that here in a clear cut and honest way. I would like to tell you that if you are facing problem in studying biology from NCERT and if you want simplified notes, then these are my notes which I have hand written, you can download these notes, the link is inside the description box and you are getting these notes only and only for 99, it is a limited time offer, for 99 you will get notes of all the chapters, not just for one chapter, okay, for that do revision Marathon.

Introduction :

 There are a lot of things that have been planned for you on this channel to bring 70 out of 70 for the biology exam. I will put in my best efforts. All the important questions, MCQs, AR based questions, Competency based questions, Marathon, whatever you need, I am going to bring on this channel. You have to subscribe to the channel and you have to take all these notes within 99. You will be well prepared with these notes. Even if you have not read NCERT for the whole year, it will also be fine. Just read them well. All the things are covered in it. 

Syllabus : 

Okay, let's start now. First of all, friend, let's start from the first chapter. Look, sexual reproduction, flowering plants, literally, I have seen the papers of previous years. This list has been prepared on the basis of that. So please take it according to that and its PDF. Okay, so you should know about pollen grains, its diagram, its structure, mega sporo. Genesis, structure of ovule should be known, its diagram should also be known, its theory should be known well, okay, TS of anther, whose diagram is made in NCERT, the names of its layers, names of all the layers like tapetum etc, what are their functions, diagram is important obviously artificial hybrid has been repeated many times, embryo sac development and female gametophytes are almost repeated every year, this thing is so please do it and go through it and especially its diagram is very important, double fertilization is important, pollination is important, afo mixes perisperm, many times question comes on perisperm as well that what happens and tell me its example, what are the examples of poly embryo, where are they, so this also comes, along with this, big questions have come on seed, seed and embryo which develop, the embryo diagrams of dicot and monocot in embryo development A lot of diagrams have been asked inside, so please do this also properly, now you will say maam all these topics are included, so look friend, I have written down the most repeated questions from wherever I have seen them in the paper analysis of the previous years and if you feel that it is from the whole chapter, then understand that brother the whole chapter is very important and I have to do it through these notes, although I am showing you these notes of molecular bio, I have prepared notes of all the chapters, you can download them, the link is in the description box and along with this, how do the male and female reproductive systems work and their diagram is very important, their theory is very important, along with the linings of the uterus There are a lot of questions on it. There are questions on the parts of the fallopian tube. There are questions on where the fertilization takes place. Menstrual cycle is so important that it is not possible that case study based questions do not come. So there are high chances of case study based questions coming. We are not sure about it but yes, looking at the previous year paper, it appears that brother, more conceptual questions are asked on the menstrual cycle and I have done it in a very lovely manner in bio brief. What is bio brief? Bio brief is our series.

NCERT Syllabus : 

There is a playlist, you can go and see it, its link is also in the description box. Here I have covered each chapter in a proper way, in a detailed manner, I have done a good revision in a short duration, it is in the revision or even if you have not read it, even if you are reading it for the first time, the bio brief is enough for you, read the bio brief, go and see the playlist, there is a link in the description box, that playlist is enough for you and these notes are enough for you, you just do them properly and go and there are all the NCERT diagrams, whose PDF I have, how does it happen, what is the process, what is fetal ejection reflex, its definition comes directly, many times questions have come on placenta formation, its diagrams are also very important, so diagrams again I am saying, I will share with you in PDF, under reproductive health, methods of contraception come up a lot and generally this IUD is asked a lot, IUD is asked a lot and After that if anything more is asked then pills and surgical methods are asked. I am not saying that the rest of the topics should not be revised. The protection methods and condom methods should not be revised. I am not saying that everything has to be revised. Everything has to be read. If you have to read, then in the bio brief I am teaching you absolutely everything. It is not like I am leaving anything out. I have made you revise it in a very nice way in a very detailed manner in less duration. No one will make you do it. If you are doing a better series than the bio brief, for youtube4, 70 out of 70 M, then that is the best series. Its link is in the description box. So all these things will be there. Amen. Cents, a question comes on it. Get it written on AIT at 110. The question will come. Whether you see in MCQ, it comes in match the following, it comes in AR, it comes in MCQs or it comes on the bigger questions. So, a question comes on AIT, assist. Reproductive technology, MTP and STD, these are fine, there are small topics like Principle of inheritance and variation, to be honest, the second unit on genetics is very important and in this I cannot tell you that friend, look, leave this and catch up with this, although I have written the topics here, but I would recommend that you should not leave a single topic, even a single topic is fine and the rest also, there is nothing to be left in the entire bio, no, you can do this easily, will you take so many gap days, do you have to read all the chapters very carefully, each and every chapter, I am saying, check the bio brief is enough playlist and these notes are enough, just do it from here, under Principle of inheritance and variation, questions definitely come from incomplete dominance and codominance.

Incomplete dominance is repeated so much that it doesn't even make sense. In codominance, you know there is a question on AB blood grouping and the concept of multiple allelism is also applied here, so here also there is a question on independent element and it is definitely very important. Along with this, if the numbering is wrong here, then we will correct the numbering, there is no one, and the test cross of your test cross, you can get it written down, for sure, you will get a question on how to make a Punnett square. Learn to make a Punnett square of each one, how to make it, it is very important. There will be a question on chromosomal disorders, Mendelian disorder, on 110 there will also be a question on pedigree analysis, which pedigree to look at, how to check it, it is explained well in the bio brief. If you want to see my detailed lectures, then you can see the details as well, its playlist is also made separately, but bio brief I would recommend is the most enough. honey bee and humans, T H Morgan's experiment has also been asked once on Drosophila, but we cannot say that yes, it means a question will definitely come from this, we cannot say that it will come for sure, but yes, do not stop doing this because it is a very important topic, molecular basis of inheritance, so brother, the whole chapter is important, to be honest, but I have written the topics here, I have included almost the whole chapter, take the double helix model of DNA, take the structure of polynucleotide chain, in the sample paper also, there are questions on the structure of the chain and what question has come, I have explained it in the bio brief, the diagram of its polynucleotide chain is very important, how many rings are there in purine pyramiding, I have explained all this in the bio brief, from there, a question has come in the sample paper, you can complete my bio brief and answer one Try doing the CBSE sample paper several times and you will yourself get an idea that Bio brief is such a series of diamonds, outside of this, you are not able to see that sample paper too, so there are high chances that your paper will also not come out after this, so do the Bio brief, take notes and do as much NCERT as you can, if you have not read it for a year, then if you have read it, then definitely revise it, slightly it is fine, and you have to practice making diagrams, MCQs come on four graph rules, good questions are numerical, as many numerical type questions are made.

Harsh and Chase's experiment is very important, very very very important, its diagram is also very important. The entire process of DNA application, transcription translation, all three are very important. Genetic code, its features are very important. Sealion feature Meselson Install's experiment which is for semi conservation method is very important. HGP human genome project and its goals are very important. DNA finger printing is important. Lack of run is important and I have written in short everything is important in this chapter, so please do this chapter carefully. Your one shot of evolution has also come inside the bio brief. Please look at the bio beef carefully. I have told you there. There are majorly five topics in evolution but I have written them together here. I will tell you what all is there, however, all those things are there which I can tell by including them in five also, like homolographic Miller's experiment is very important, question comes on industrial melania because it is an example of natural selection, hardy one work principle and so its graph is very important, its numericals again, how to solve its numericals, it has been explained very well in the bio brief, numericals have also been solved and shown, bio brief is enough, yes brother I am doing it because it is worth it, it is important, the things which are important It comes repeatedly on the tongue automatically this is important okay I am not just saying something to you, really trust me, trust me, it will come last year also the children's papers were made from whatever I taught, it has come from that, if you want 30 minute revision series, a playlist for that is also made, if you want to revise the whole chapter within 30 to 50 minutes, a playlist for that is made in fast, check the description box, okay ah Darwin's theory, his observation on Gale Pecas Island, it is explained in a very nice way in bio brief, I have explained everything in a very nice way, so human evolution is important, so see, it is very important, question comes on brain capacity very often here and they ask who came after whom, okay, Dryopithecus Dramme Pittes Kas Australopithecus Homo habilis Ductus Thal, they ask this line, they ask the order, basically so and question comes on their brain capacity very often, human health and Diseases is a very important chapter again, what are the positive agents of all the diseases, what is the sim of every disease, it is very important plasmodium, its life cycle is very important, its diagram is very important, there is a big question on immunity, what are the barriers in immunity, innate immunity, plus humoral immunity, cell death immunity, a lot of MCQs are made on this too, antibody diagram is very important, my God, antibody diagram is very important, so do it well, how many types of antibodies are there, five types, dirty, so I will explain it well in the bio brief, then it will definitely come from it, AIDS, cancer is very important, drugs and this means for sure the one about drugs will come on 110, so get it written, it is not possible that the question of drugs does not come, CBSE people make it by taking drugs only, I think they always put the drug question in this paper Let us talk about microbes in human welfare, this is a small chapter, this is also very important, what happens in it, the uses of microbes in different regions, where they are used in different sectors.

Topics for CBSE Exams

Everything in the industry is very, very, very important. All the bio-active molecules that are there, Cyclospora A, every single thing is very important. And in my board exams, I got a little confused about who does what. My marks were cut because of this. I had 98 marks and two marks were cut because of this. So, I had the confidence to memorize it, but it happens at the last moment. But I am saying the same thing. If you revise again and again, it will happen. Now, many students say, ma'am, should we see the bio brief or not? Our syllabus is complete. Brother, why are you not seeing it? We need revision. We need revision in bio. It's okay. We have read bio only once. It's a good thing. You can revise from the notes. There is no problem with that. But even if you watch the lecture at 2x, there will be no problem. You will not suffer any loss. Your even two notes will open up to learn one or two concepts and extras. If you get it, then put it on 2x and watch it. If you have time, then you have a very amazing series. Otherwise, there is a 30 to 50 minute series, watch that rapid revision series. If you want to revise fast, okay. Along with this, all the tables in NCERT, from the use of microbes and their names, you have to do all that properly. How is sewage treatment done, primary and secondary treatment. How do biogas plants produce biogas? Which bacteria evolve in the production of biogas? Which gas has the highest contribution? That diagram of the complete biogas plant is very important. Bio control agents are very important. The last chapter, which has been given, biotechnology principles and process, again very very very important. Restriction enzymes are very important. Their names and how they work, this work is very important. Gel electrophoresis means I have not seen a paper in which gel electrophoresis, PCR or Restriction enzymes, none of these three topics has been asked. Definitely, I am sitting here for 200 minutes. One or the other of these three things will definitely come up. One or the other thing or two things may come up and these are repeated a lot. The diagram of PBR 322, all its labeling should come up very well. What is bioreactor and downstream processing? In bioreactor, simple states and tank bioreactors, both types of bioreactors should come up. Then, in biotechnology end application, how does Basal Ranjas work on BT cotton? The question of caterpillar larvae definitely comes up. How does RNA interference work? These are only two or four methods. There are only two or four techniques on which most of the questions are asked. Human insulin, its diagram is very important. A chain, B chain and C chain. C is removed and A and B are added. Questions come up on gene therapy, AD deficiency, biopiracy. Brother, a big question comes up and a question can come up on Soma clone because that topic has also been included in this chapter, okay, so that should also be done very well, the chapter on Soma clone, how is the Soma clone being formed, here after that if we talk about organism and population, then this is the edge pyramids in it, all these three chapters are so small.

 

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