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Ask QuestionPosted by Bharti Jain 6 years, 5 months ago
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Posted by Bharti Jain 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
Eli Lilly prepared two DNA sequences corresponding to A and B chains of human insulin and introduced them in plasmids of <i>E.coli</i> to produce insulin chains. Chains A and B were produced separately, extracted and combined by creating disulphide bonds to form human insulin. Insulin in human pancreas is synthesised as a pro-hormone containing the C peptide, which is removed in mature hormone. The insulin synthesised by recombinant DNA technology did not contain C peptide and was prepared in the mature form.
Posted by Bharti Jain 6 years, 5 months ago
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Posted by Soumya Kumari 6 years, 5 months ago
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Prateek Mishra 6 years, 5 months ago
Posted by Abhishek Chaubey 6 years, 5 months ago
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Aryan Maurya 6 years, 5 months ago
Posted by Mousumi Roy 6 years, 5 months ago
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Posted by Sumit Jain 6 years, 5 months ago
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Posted by Milan Krishna 6 years, 5 months ago
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Posted by Afsal Faasi 6 years, 5 months ago
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Posted by Mayank Pal 6 years, 5 months ago
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Meghna Thapar 5 years, 8 months ago
Teratogen: Any agent that can disturb the development of an embryo or fetus. Teratogens may cause a birth defect in the child. Or a teratogen may halt the pregnancy outright. The classes of teratogens include radiation, maternal infections, chemicals, and drugs. Hence, teratogens are substances that may produce physical or functional defects in the human embryo or fetus after the pregnant woman is exposed to the substance. Alcohol and cocaine are examples of such substances.
Posted by Abhishek Kala 6 years, 5 months ago
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Posted by Kamlesh Kumar 6 years, 5 months ago
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Kajal Tyagi 6 years, 5 months ago
Posted by Kamlesh Kumar 6 years, 5 months ago
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Posted by Kamlesh Kumar 6 years, 5 months ago
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Shyambabu Yadav 6 years, 5 months ago
Posted by Kamlesh Kumar 6 years, 5 months ago
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Meghna Thapar 5 years, 8 months ago
In the honeybee, *** can be determined by the haplodiploid ***-determination system. *** is determined by the number of sets of chromosomes received by an individual. The egg which is fertilized by sperm becomes diploid and develops into female and unfertilized egg develops into a male by parthenogenesis. The queen and worker bee, therefore, contain 32 chromosomes. The drone i.e., male bears 16 chromosomes. The sperms are produced by mitosis while eggs are produced by meiosis.
Posted by Kamlesh Kumar 6 years, 5 months ago
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Meghna Thapar 5 years, 8 months ago
Aneuploidy is the presence of an abnormal number of chromosomes in a cell, for example, a human cell having 45 or 47 chromosomes instead of the usual 46. It does not include a difference of one or more complete sets of chromosomes.
December 27, 2019
Posted by Kamlesh Kumar 6 years, 5 months ago
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Parul Singh 6 years, 5 months ago
Sanchit Garg 6 years, 5 months ago
Sneh Deswal 6 years, 5 months ago
Posted by Shikha Ary 6 years, 5 months ago
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Posted by Aryan Maurya 6 years, 5 months ago
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Posted by Harjot Grewal 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
It is a method of breeding crops with higher levels of vitamins, minerals, healthier fats to improve public health. The objective of breeding for improved nutritional quality is to enhance:
(a) Protein and oil content, and quality.
(b) Vitamin content.
(c) Micronutrients and mineral content.
Some examples of crop varieties with improved nutrient contents are:
(a) Maize hybrids with increased amount of amino acids, lysine and tryptophan.
(b) Atlas 66 is a wheat variety having a high protein content which has been used as donor for improving cultivated wheat.
(c) Iron fortified rice with five times increased iron content than commonly consumed varities.
Posted by ♡♡Amrit♡♡ ●●Brar■■ 6 years, 5 months ago
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Meghna Thapar 5 years, 8 months ago
Agrobacterium tumefaciens is a plant pathogen and most effective as plant genetic engineer. It causes the formation of crown gall in plants. The tumor-inducing plasmid Ti can be used as a useful cloning vector in gene cloning in plants. The genes on the T-DNA can now be expressed in the plant cell. Researchers often use Agrobacterium to make transgenic plants in the lab. They replace the Agrobacterium genes on T-DNA with the gene they are studying, and the Agrobacterium integrates the new gene into the plant cell's DNA.
Posted by Suraj Patel 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
The monthly cycle of changes in the ovaries and the lining of the uterus (endometrial), starting with the preparation of an egg for fertilization. When the follicle of the prepared egg in the ovary breaks, it is released for fertilization and ovulation occurs.
Kush Patel 6 years, 5 months ago
Posted by Ayushi Singh 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
Human genome project
- The scientific project which deal with the study of base sequences of DNA molecules of complete set of chromosomes is called human genome project.
- HGP was closely associated with the rapid development of a new area in biology called as
- Goals of Human Genome Project
- Identify all the approximately 20,000-25,000 genes in human DNA.
- Determine the sequences of the 3 billion chemical base pairs that make up human DNA.
- Store this information in databases;
- Improve tools for data analysis;
- Transfer related technologies to other sectors, such as industries;
- Address the ethical, legal, and social issues (ELSI) that may arise from the project.
Posted by Prateek Mishra 6 years, 5 months ago
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Posted by Roma Singh 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
| Active Immunity | Passive Immunity |
| Active immunity is a permanent immunity produced by the antibodies of the host in response to a direct contact of an antigen | Passive immunity is a short-term immunity produced by the introduction of antibodies from outside to the host |
| Immunity doesn’t occur immediately. A time lag occurs for its development | Immunity develops immediately. There is no time lag |
| It generates an immunological memory | Doesn’t generate immunological memory |
| When the antigens enter the body naturally, antibodies and specialised lymphocytes are induced by the body | Antibodies are passed from a mother to a fetus through the placenta and to an infant via mother’s milk. |
| No side-effects | It may cause reactions |
Posted by Roma Singh 6 years, 5 months ago
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Parul Singh 6 years, 5 months ago
Posted by Nishu Goyal 6 years, 5 months ago
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Posted by Jd Chouhan 6 years, 5 months ago
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Kajal Sindhu 6 years, 5 months ago
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