Practice Questions

TLS Online TPP Program

#Question id: 1104

Which of the following statements is true of signal molecules?

#XL - Q Biochemistry

When signal molecules first bind to receptor tyrosine kinases, the receptors phosphorylate a number of nearby molecules.
In response to some G protein-mediated signals, a special type of lipid molecule associated with the plasma membrane is cleaved to form IP3 and calcium.
In most cases, signal molecules interact with the cell at the plasma membrane, enter the cell, and eventually enter the nucleus.
Protein kinase A activation is one possible result of signal molecules binding to G protein coupled receptors.

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TLS Online TPP Program

#Question id: 436

#XL - R Botany

A chemical reaction with a negative enthalpy change and a negative entropy change

TLS Online TPP Program

#Question id: 9266

#XL - R Botany

which similarly inclusive taxon is represented as descending from the same common ancestor as Canidae?

TLS Online TPP Program

#Question id: 917

#XL - Q Biochemistry

The glycerol produced from the hydrolysis of triacylglycerides enters glycolysis as:

TLS Online TPP Program

#Question id: 20037

#XL - P Chemistry

Velocity of electron in the first orbit of H-atom is compared to that of velocity of light is approximately

TLS Online TPP Program

#Question id: 19618

#XL - P Chemistry

Plotting a graph between temperature and reaction rates can reveal the temperature dependence of reaction rates.