Practice Questions

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#Question id: 4133

Which of the following statements about aminoacyl-tRNA synthetases is false?

#SCPH01 Biochemistry

Some of the enzymes have an editing/proofreading capability.
The enzyme attaches an amino acid to the 3' end of a tRNA.
The enzyme splits ATP to AMP + PPi.
The enzyme will use any tRNA species, but is highly specific for a given amino acid.

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#Question id: 13037

#SCPH05 I Biotechnology

Which of the following proteins will be most far away from the positively charged electrode during isoelectric focusing in a buffer with pH of 5?

TLS Online TPP Program

#Question id: 13037

#SCPH06 I Botany

Which of the following proteins will be most far away from the positively charged electrode during isoelectric focusing in a buffer with pH of 5?

TLS Online TPP Program

#Question id: 13037

#SCPH28 | Zoology

Which of the following proteins will be most far away from the positively charged electrode during isoelectric focusing in a buffer with pH of 5?

TLS Online TPP Program

#Question id: 13038

#SCPH01 Biochemistry

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: 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: 13038

#SCPH06 I Botany

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