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#Question id: 5760


The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that

#SCPH28 | Zoology
  1. T1 phage was a mutagen.

  2. Mutations could arise prior to the time they were selected

  3. The mutation rate varies greatly from experiment to experiment.

  4. In E. coli the number of mutants per clone was relatively constant.

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TLS Online TPP Program

#Question id: 9593

#SCPH05 I Biotechnology

The lower-energy orbital of the positively charged oxidized reaction centre chlorophyll has a vacancy and can accept an electron If the acceptor molecule donates its electron back to the reaction centre chlorophyll, What will happened?

TLS Online TPP Program

#Question id: 4171

#SCPH05 I Biotechnology

Use the table below to determine which template strand DNA sequence (written in the 5ʹ → 3ʹm direction) specifies the tripeptide with the sequence gly-ala-leu.

TLS Online TPP Program

#Question id: 12721

#SCPH06 I Botany

There are the five groups of late embryogenesis abundant (LEA) proteins found in plants

Match the following groups of LEA protein with its functional information;

 Group (family name)

                           Functional information

 

I) Group 1

   (D-19 family)

 

 

a) It is an abundant protein in cotton embryos, Each putative dimer of this group may bind as many as ten inorganic phosphates and their counterions

 

 

II) Group 2

    (D-11 family)

 

b) Possibly functions in ion sequestration to protect cytosolic metabolism When LE25 is expressed in yeast, it confers salt and freezing tolerance

 

 

III) Group 3

     (D-7 family)

 

c) In tomato, a gene encoding a similar protein is expressed in response to nematode feeding

 

 

IV) Group 4

    (D-95 family)

 

d) Contains more water of hydration than typical globular proteins Overexpression confers water deficit tolerance on yeast cells

 

 

V) Group 5

    (D-113 family)

 

e) Often localized to the cytoplasm or nucleus More acidic members of the family are associated with the plasma membrane May act to stabilize macromolecules at low water potential

 

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#Question id: 13038

#SCPH05 I Biotechnology

Please arrange the following steps about ELIZA (Enzyme-linked immunosorbent assay) in chronological order
i. incubate with antibody-enzyme complex that binds primary antibody
ii. coat surface with antigen, block unoccupied sites with nonspecific protein
iii. add substrate, formation of colored product indicates presence of specific antigen
iv. incubate with primary antibody against specific antigen

TLS Online TPP Program

#Question id: 19768

#SCPH05 I Biotechnology

When atoms of the gold sheet are bombarded by a beam of á -particles, only a few á-particles get deflected whereas most of them go straight undeflected. This is because