The graph here shows the results of Jacob and Monods first eperments with beta g

Question

The graph here shows the results of Jacob and Monods first eperments with beta galactosidase and laciose in E coi fbetaaalactosidase were anstate inthe absence of lactose one of the hypotheses they tested what results would you expecttosee? the results shown in the graph an increase in betapalaciosdase after actose s removed a decrease in beragaactosidase after lactoseis removed an initially high level of betagalactosdase at the beginning of the eperiment with a steady dedine over time E) None of these chooesare comect 1 In garden peas the allele for tal plantsisdominantoverthe aleieforshort plants Two crosses are performed 10 A anebreeding tal plant is oossed with ashort plant 20 One of the offspring from the fist cross then out of20ofspring resulting from the test cross about should betal C) 10 D) 15 E 20 12 in the A20 blood type system. A) Ais dominant to B, and Bis dominant too. B A, B and o are incompletely dominant CA and B are codominant D) o is incompienelly to A and B E None of the above 13 Lasomes are required for A the break down molecules inside the cell B protein glycosy aton D generating ATP. E meiosis Gene regulation by siRNA may have evolved originally as a A way to regulate gene erpression E way to regulate protein actury defense against mutations that may cause cancer D defense against bacteria E defense against iruses 15. Both miRNA and siRNA work in conjunction with transcricts nudeus A) RNA polymerase to bind RNA inthe cynopiasm B hairpin structures to bind RNA tanscricts in C) DNA polymerase to bind DNA inthe nucleus cytoplasm. D a protein complex called RISC tobind RNA transcripts inthe nudeus E a proteincomplex called RISC to bind RNA

Explanation / Answer

Correct answers:

12.C: A&B are co-dominant (which means type A and B parents can give birth to AB type child)

13. A: for breakdown of molecules inside the cell. (Lysosome is a membrane bound organelle found in the cytoplasm of the eukaryotic cells and helps in breakdown of all biomolecules)

14. E (Defence against viruses).(Short interfering RNA helps in short-duration silencing of protein coded genes and helps to safeguard from exogenous /foreign nucleic acids or viruses)

15. D (explanation: miRNA & siRNA are not distinguishable functionally and biochemically. Both combine with RISC and helps in gene silencing in the cytoplasm.)

(Note: Initial two questions are not clearly readable so answered maximum possible)

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