Practice Questions

TLS Online TPP Program

#Question id: 4133

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

#SCPH05 I Biotechnology

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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TLS Online TPP Program

#Question id: 11085

#SCPH28 | Zoology

The diagrams show changes in the partial pressures of oxygen and carbon dioxide as blood flows from the arterial end to the venous of the pulmonary capillaries. Which diagram best depicts the normal relationship between Po2 (red line) and Pco2 (green line) during resting conditions?

TLS Online TPP Program

#Question id: 18669

#SCPH01 Biochemistry

Glycoproteins have traditionally been detected on protein gels by use of the

TLS Online TPP Program

#Question id: 79

#SCPH05 I Biotechnology

The structure of D-arabinose is shown below. How many stereoisomers are possible for this molecule?

TLS Online TPP Program

#Question id: 18634

#SCPH01 Biochemistry

Number of rooted trees in a phylogeny of five sequences is –