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DNA recombination??

Posted by Tika Chettri 7 years, 1 month ago

1 answers

Rohit Sharma 7 years, 1 month ago

Hiii joining together of DNA molecules from two different species that are inserted into a host organism to produce new genetic combinations that are of value to science, medicine, agriculture, and industry. Since the focus of all genetics is the gene, the fundamental goal of laboratory geneticists is to isolate, characterize, and manipulate genes. Although it is relatively easy to isolate a sample of DNA from a collection of cells, finding a specific gene within this DNA sample can be compared to finding a needle in a haystack. Consider the fact that each human cell contains approximately 2 metres (6 feet) of DNA. Therefore, a small tissue sample will contain many kilometres of DNA. However, recombinant DNA technology has made it possible to isolate one gene or any other segment of DNA, enabling researchers to determine its nucleotide sequence, study its transcripts, mutate it in highly specific ways, and reinsert the modified sequence into a living organism.

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??Is there Any change in Bioloy syallabus 2019 class 12th??❓❓

Posted by Harsh Kumar 7 years, 1 month ago

CBSE > Class 12 > Biology

3 answers

Deepa Singh 7 years, 1 month ago

Chech the site=cbse.nic.in

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Yashika Utreja 7 years, 1 month ago

Now in board xams mcq will also come

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Dolly Sneha 7 years, 1 month ago

Yes

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transferring of DNA into the host means??

Posted by Mahendra Varman 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Mahak Kanojia 7 years, 1 month ago

Recombinant DNA is transferred into competent host.. Thus changing its phenotype... Which is then used for biotechnological purposes.... Basically transferring means introducing r DNA into host genome using cloning vector (plasmid)

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School project on biodiversity and conservation

Posted by Akash Jha 7 years, 1 month ago

CBSE > Class 12 > Biology

0 answers

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Which type of rays transmitted to the outer ear

Posted by Saloni Verma 7 years, 1 month ago

CBSE > Class 12 > Biology

0 answers

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I need 2015 question paper of biology of outside delhi

Posted by Anshika Lakra 7 years, 1 month ago

CBSE > Class 12 > Biology

2 answers

Santoo Ganiger 7 years, 1 month ago

Send your no,i will send you or search on net

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Mohit Sepat 7 years, 1 month ago

Search on net

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The prophase 1 stage of meiosis plays a vital role in r- DNA formation . Justify with reason

Posted by Tanu Chahar 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Anuradha Sharma 7 years, 1 month ago

Because in prophase 1 of meiosis there is exchange of dna that's why which we say prophase 1 is vital for r-Dna

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सक्रियण ऊर्जा से क्या तात्पर्य है?

Posted by Shiva Tabahi 7 years, 1 month ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Photosythesis process

Posted by Boobalan Bala 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Shaik Naseema 7 years, 1 month ago

It is a process which converts light energy into chemical energy. In this process plant takes co2 and water in the presence of light it gives glucose and oxygen , energy.

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What is the genetic material of virus

Posted by Anand Singh 7 years, 1 month ago

CBSE > Class 12 > Biology

2 answers

Mohit Sepat 7 years, 1 month ago

RNA

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Priyanka Kumari 7 years, 1 month ago

DNA is the genetic material of virus. But some viruses such as retrovirus has RNA as a genetic material.

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What is DNA finger printing

Posted by Nilesh Gehlot 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Mohd Ruman 7 years, 1 month ago

DNA profiling (also called DNA fingerprinting) is the process of determining an individual's DNA characteristics, which are as unique as fingerprints. DNA analysis intended to identify a species, rather than an individual, is called DNA barcoding.

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What are sticky ends? Why they are called sticky end? How are they form

Posted by Anshika Lakra 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Deepa Singh 7 years, 1 month ago

Sticky ends are the overhanging strech of DNA as a result of cutting the two strands of double helix by the restriction enzyme. They are called sticky ends because of the property to form hydrogen bond with their complementry counter parts.

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What does it mean - collection and preservation of all the different wild varieties, species and relatives of the cultivated species is a pre requisite for effective exploitation of natural genes avilable in the population.....pg no 171 ch 9

Posted by Isha Ahuja 7 years, 1 month ago

CBSE > Class 12 > Biology

0 answers

ANSWER

Why is dna molecule considered as a better heredity material than rna molecule?

Posted by Cicil George 7 years, 1 month ago

CBSE > Class 12 > Biology

4 answers

Aniket Upadhyay 7 years, 1 month ago

This is because it contains all the qualities of a genetic material i.e it is chemically more stable than the RNA because of it's double stranded structure where as RNA is not stable and RNA also acts as a catalyst . So RNA is more vulnerable towards mutations so RNA can't be termed as a good genetic material

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Harshvardhan Sharma 7 years, 1 month ago

Dna is double strand and it tooks some bonds and bases. the codes are unique which conduct the information in it double strands.which cannot be uncoiled without any enzyme..

2Thank You

Krishna Garg 7 years, 1 month ago

Because dna is a double stranded and structurally more stable than rna molecule because of this reason dna molecule is considered as a better hereditary material than rna molecule.

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Cicil George 7 years, 1 month ago

Pls help?

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Define a vector

Posted by Shivam Sagar 7 years, 1 month ago

CBSE > Class 12 > Biology

2 answers

Anuradha Sharma 7 years, 1 month ago

In biology vector is used as vehicle to deliver/transfer gene of interest.

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Joshin Jose 5 years, 8 months ago

A vector is a component that has both magnitude and direction

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Difference between restriction endonuclease and normal endonuclease?

Posted by Anuradha Sharma 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Yogita Ingle 7 years, 1 month ago

Endonuclease enzyme is the enzyme which breaks the phosphodiester bond present anywhere inside the DNA molecule; while restriction endonuclease enzymes are the enzymes which breaks the nucleotide sequences at specific location only. Restriction endonucleases cut at specific nucleotide sequences known as restriction sites.

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What would be the ploidy of the cell of the tetrad?

Posted by Vikas Kumar 7 years, 1 month ago

CBSE > Class 12 > Biology

4 answers

Anuradha Sharma 7 years, 1 month ago

Tetra=4 means tetrad=4n

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Mohit Sepat 7 years, 1 month ago

Haploid means n

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Mahipal Choudhary 7 years, 1 month ago

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Bhawani Shankar Sharma 7 years, 1 month ago

4 n

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Explain decomposition cycle

Posted by Sakshi Bansal 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

S R S Yadav(8764797485Whatapp) 7 years, 1 month ago

Decomposition is largely an oxygen-requiring process. If we want to understand #Decomposition cycle(DC)# then take a example.DC in terrestrial ecosystem A tree grows in the soil - A tree leaf falls to the ground and some are eaten by insects and other animals. Nutrients and energy enter food web / some nutrients leach in to soil by chemical action - #Organic rich soil # Or leaves partially consumed by decomposers such as Fungi and bacteria. They begin to lose form and become LITTER. -Further decomposition by earthworms ,bacteria,mites,Fungi,etc. #Organic rich soil # A tree grows in the soil and so on this cycle is known as DECOMPOSITION CYCLE.

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What is fate map?

Posted by Pinki Saikia 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

S R S Yadav(8764797485Whatapp) 7 years, 1 month ago

Fate map is a method of understanding the embryonic origin of various tissue in adult organism by establishing correspondence between individual cells at one stage of development,and their progeny at later stages of development . #cell lineage tracing #

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How we can buy the coupons .pls tell me

Posted by Mohit Sepat 7 years, 1 month ago

CBSE > Class 12 > Biology

1 answers

Mohit Sepat 7 years, 1 month ago

Plsssss bta do

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What are cry gene

Posted by Aniket Doke 7 years, 1 month ago

CBSE > Class 12 > Biology

5 answers

Kuldeep Singh 7 years, 1 month ago

It is a gene which code for b the toxin

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Aditya Kumar Mishra 7 years, 1 month ago

cry means crystal

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Aditya Kumar Mishra 7 years, 1 month ago

cry gene codes for cry protien which is a (toxin) insecticidal protien

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Deepa Singh 7 years, 1 month ago

Cry gene is a gene that codes for the bt toxin(insecticidal protein).

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Mohit Sepat 7 years, 1 month ago

Cry means crystal which contain insecticidal protein .ex.cry1Ac control the cotton bollworm and cry 1Ab control corn borer

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Which topic is best for making project of 12th class

Posted by Preeti Yadav 7 years, 1 month ago

CBSE > Class 12 > Biology

3 answers

Mahipal Choudhary 7 years, 1 month ago

Biotechnology

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Yo Yo Honey Singh ? 7 years, 1 month ago

From which subject you are asking for phy you can make project on PNP diode generator and for chemistry you can make project on foaming capacity of soap polymers

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Harshit Kumar 7 years, 1 month ago

Hershey chase experiment

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What is sperm

Posted by Kapil Verma 7 years, 1 month ago

CBSE > Class 12 > Biology