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When DNA is transferred from a culture o...

When DNA is transferred from a culture of capsulated pneumococcus to a culture of non capsulated pneumococcus converting the latter into the former type, the process is known as.

A

translocation

B

conjugation

C

transformation

D

transduction

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The correct Answer is:
C
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The process of transferring the cell-culture from old medium to fresh culture medium is known as :-

There are two very small natural particle which are held fixed at a separation of 1 m from each other . Using some mechanism , one electron is transferred from particle to the other and electric potential energy lost in this process is converted into a photon of wavelength lamda_1 . When one more electron is transferred in the same direction , the wavelength of photon emitted is lamda_2 . If lamda_1 -lamda_2=5^pxx23^q calculate the value of pq. {:(0,1,2,3,4,5,6,7,8,9):}

Assertion : In transforming principle, when streptococus pneumoniae (Pneumococcus) bacteria are grown on a culture plate, some produce smooth shiny colonies (S) while other produce rough colonies (R). Reason : S strain bacteria have a mucous (polysaccharide) coat, while R strain does not.

Many lyophilic sols and few lyophobic sols when coagulated under some special conditions changes into semi rigid mass, enclosing whole amount of liquid within of liquid within itself, it is called gel and the process is called gelation. Gelatin, agar-agar, gum-Arabic can be converted into gels by cooling them under moderate concentration conditions. Hydrophobic sols like silicic acid. Al(OH)_(3) are prepared by double decomposition and exchanged of solvent method. Types of gel : 1. Syneresis/weeping of gel : The spontaneous liberation of liquid from a gel is called syneresis or weeping of gels. It is reverse of swelling. e.g., geletin, agar-agar show syneresis at low concentration while silicic shows it at high concentration. 2. Imbibition or swelling of gel : When gel is kept in a suitable liquid (water) it absorb large volume of liquid. The phenomenon is called imbibition or sweeling of gel. 3. Thixotropic : Some gels when shaken to form a sol, on keeping changes into gel are termed as thixotropic gel and phenomenon is called thixotropy. e.g., gelatin and silica liquify on shaking changing into corresponding sol and the sol on keeping changes back into gel. Some types of gels like gelatin and silica liquify on shaking thereby changing into sols. The sols on standing change back into gels. This process is know as :

TRUEMAN BIOLOGY-MOLECULAR BASIS OF INHERITANCE-MCQs
  1. DNA replication is:-

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  2. Under the concept of triplet code, the segment of DNA specifying one f...

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  3. When DNA is transferred from a culture of capsulated pneumococcus to a...

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  4. Sum of all the genes is a population is called

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  5. If 50 heavy DNA (N^(15)) molecules are replicated 2 times in N^(14) me...

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  6. The experiment which proved conclusively that during infection only DN...

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  7. There is some permissible latitude in the pairing of the third base in...

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  8. A DNA molecule in E. coli is heavy and labelled with N^(15). Iit is al...

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  9. Taylor experiment on Vicia faba (broad bean) root tips using autoradio...

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  10. if a labelled DNA (with a heavy isotope) replicates in conservative ma...

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  11. If DNA replication is conservative, what woul be expected distribution...

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  12. Which one of the following ratios is variable but constant for a speci...

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  13. if one chain of a DNA molecule has the base order 5'ATTGACGT3' . . . ....

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  14. Codons that specify same amino acids are called

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  15. Semiconservative replication of DNA was given by

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  16. In a polyribosome complex, the ribosome present towards 5'end of mRNA ...

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  17. At which end of mRNA translation always begins?

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  18. mRNA iin prokaryotes is usually

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  19. A segment of DNA has base sequence GAC GAC CGC AAA ACA AGC. Due to del...

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  20. Which is related to Teminism?

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