Practice Questions

TLS Online TPP Program

#Question id: 2145

An electrogenic Na+ transporter:

#XL - S Microbiology

catalyzes facilitated diffusion of Na+ from a region of high Na+ concentration to one of lower Na+ concentration.
must catalyze an electron transfer (oxidation-reduction) reaction simultaneously with Na+ transport.
must transport both Na+ and a counterion (Cl–, for example).
transports Na+ without concurrent transport of any other charged species.

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TLS Online TPP Program

#Question id: 170

#XL - T Zoology

Desmosine, an uncommon amino acid is derived from

TLS Online TPP Program

#Question id: 19641

#XL - P Chemistry

A miscible mixture of benzene and chloroform can be separated by:

TLS Online TPP Program

#Question id: 5268

#XL - S Microbiology

Competent cells

TLS Online TPP Program

#Question id: 12585

#XL - R Botany

Agricultural lands frequently require nutritional supplementation because

TLS Online TPP Program

#Question id: 4969

#XL - S Microbiology

The snowball Earth hypothesis provides a possible explanation for the