No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

    • Posted by Shikha Kashyap 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Shikha Kashyap 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Pramod Kumar 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Aryan Dhiman 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 4 answers

    Abhineet Aanand 7 years, 4 months ago

    As the development of the zygote starts

    1Thank You

    Mohit Sepat 7 years, 5 months ago

    Due to progesterone hormone . And menstruation blood help in development of foetus .

    1Thank You

    Ravi Rao 7 years, 5 months ago

    Because fertilisation takes place at that time

    1Thank You

    Kanchan Priyadarshi 7 years, 5 months ago

    Due to development of embryo

    1Thank You

    ANSWER

    • Posted by Zeba Ansari 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years, 5 months ago

    There are three major types of RNAs in bacteria:

    • Messenger RNA (mRNA) – It provides the template to make protein.
    • Transfer RNA (tRNA) – It reads the genetic code and transfers amino acids for protein synthesis.
    • Ribosomal RNA (rRNA) – It has a structural and catalytic role in protein synthesis.

    2Thank You

    ANSWER

    • Posted by Janvi Dahre 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Raj Singh 7 years, 4 months ago

    what is the question

    0Thank You

    ANSWER

    • Posted by Janvi Dahre 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Mohit Sepat 7 years, 5 months ago

    Nhi pta

    0Thank You

    Janvi Dahre 7 years, 5 months ago

    Plzz de do yll

    0Thank You

    ANSWER

    • Posted by Saud Ansari 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sweety Sweety 7 years, 5 months ago

    By both of them the cromosomes number is controled so they are important if they do not happen more than 23 chromosome will go in the progeny and it will disturb the whole System..

    0Thank You

    ANSWER

    • Posted by Sania Nasir 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sweety Sweety 7 years, 5 months ago

    Those cell which does not have nuclear membrane called prokaryotic cell and those cell have nuclear membrane called eukaryotic

    1Thank You

    ANSWER

    • Posted by Shakeel Khan 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years, 5 months ago

    DNA fingerprinting is the technique of finding the difference between the satellite DNA regions in the genome. These regions are stretches of repetitive DNA which do not code for any specific protein. These non-coding sequences form a major chunk of the DNA profile of humans. They depict a high level of polymorphism and are the basis of DNA fingerprinting. These genes which show a high level of polymorphism in all kind of tissues as a result of which they prove to be very useful in forensic studies.
    Any piece of DNA sample found at a crime scene can be analysed for the level of polymorphism in the non-coding repetitive sequences. After the DNA profile is traced, it becomes easier to find the criminal by performing the DNA fingerprinting for the suspects. Apart from crime scenes, Fingerprinting applications also prove useful in finding the parents of an unclaimed baby by conducting Paternity test on a DNA sample from the baby.

    0Thank You

    ANSWER

    • Posted by S Rohit Kumar 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Dua Gupta 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Akash Raj 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Sweety Sweety 7 years, 5 months ago

    Mother cell

    0Thank You

    ANSWER

    • Posted by Sweety Sheoran 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 2 answers

    Sweety Sweety 7 years, 5 months ago

    Nucellus is a membrane that cover ovule in overy.

    0Thank You

    Sweety Sheoran 7 years, 5 months ago

    Please tell me fast

    0Thank You

    ANSWER

    • Posted by T S 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Piyush Jain 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 7 years, 4 months ago

    The tryptophan operon is the regulation of transcription of the gene responsible for biosynthesis of tryptophan from chorismate.

    Tryptophan operon consists of structural gene and regulatory gene.

    I. Regulatory gene are Promoter, Repressor, Operater and Leader sequence.

    II. Structural gene are TrpE, TrpD, TrpC, TrpB and TrpA

    1. trpE: It enodes the enzyme Anthranilate synthase I
    2. trpD: It encodes the enzyme Anthranilate synthase II
    3. trpC: It encodes the enzyme N-5’-Phosphoribosyl anthranilate isomerase and Indole-3-glycerolphosphate synthase
    4. trpB: It encodes the enzyme tryptophan synthase-B sub unit
    5. trpA: It encode the enzyme tryptophan synthase-A sub unit

    0Thank You

    ANSWER

    • Posted by Ashish Yadav 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Vikas Sharma 7 years, 5 months ago

    Both have similar characteristics

    0Thank You

    ANSWER

    • Posted by Sony Khan 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Nidhi Malik 7 years, 5 months ago

    Changes

    0Thank You

    ANSWER

    • Posted by Passang Phuti 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Ritika Sharma 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Parsottam Bhai 7 years, 5 months ago

    Cleistogamous flowers always remain close in their bud. These are mostly bisexual. Because of these features, the dispersion of pollen grains always occur inside the bud and on the stigma of pistil or capel of same flower of these pollen grains. This results in the self pollination. Hence we can say that cleistogamous ensure autogamy.

    0Thank You

    ANSWER

    • Posted by Ritika Sharma 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Richa Keshari 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Mohd Shadan Shadan 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Mohd Shadan Shadan 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Unnati Verma. Unnati Verma. 7 years, 5 months ago

    Polymerase chain reaction is a technique used in molecular biology amlify the single copy or a few copy of a DNA segment.

    1Thank You

    ANSWER

    • Posted by Anupama Mazumdar 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Shruti Mishra 7 years, 5 months ago

    During proliferation of HIV, Th cells (helper T )cells decreases upto 200 units / cm^3. Till this phase following sign and symptoms are seen and are called ARC(AIDS related complex) which help us to detect hiv infection: -headache -bodyache -weight loss -loss of appetite -fever -fatigueness Opportunistic diseases are also a symptom eg. Toxoplasmosis , cytomegalovirus infection , TB, kaposis sarcoma etc.

    0Thank You

    ANSWER

    • Posted by Mohit Sepat 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Mohit Sepat 7 years, 4 months ago

    Anyone pls tell the answer

    1Thank You

    ANSWER

    • Posted by Aditi Singh 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Annie Singh 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Mohit Sepat 7 years, 5 months ago

    A solid body of cells resulting from division of a fertilized ovum ,and from which a blastila is form .

    1Thank You

    ANSWER

    • Posted by Damanjeet Kaur 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 0 answers
    ANSWER

    • Posted by Sandeep Tiger 7 years, 5 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Shruti Sharma 7 years, 5 months ago

    Cross pollination generally occur in dioecious condition in this anther of one flower process with stigma of another flower of different plants of same species that means when pollen grains germinate on and then it goes to the stigma through various cross pollinating agents on the stigma of another flower

    1Thank You

    ANSWER

    myCBSEguide App

    myCBSEguide

    Trusted by 1 Crore+ Students

    Install Now

    Test Generator

    Test Generator

    Create papers online. It's FREE.

    Try Now

    CUET Mock Tests

    CUET Mock Tests

    75,000+ questions to practice only on myCBSEguide app

    Install Now
    Google Play

    Download myCBSEguide App

    All Courses

    Other Websites

    CBSE Courses

    Resources

    Corporate

    NCERT Solutions

    CBSE Sample Papers

    All Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2025