Practice Questions

TLS Online TPP Program

#Question id: 427

The degradation of which class of biochemicals does not significantly contribute to the release of energy to cells?

#Unit 1. Molecules and their Interaction Relevant to Biology

nucleic acids
proteins
lipids
carbohydrates

More Questions

TLS Online TPP Program

#Question id: 3652

#Unit 3. Fundamental Processes

Alkylating agents are electrophilic chemicals which readily add alkyl groups to various positions on nucleic acids. A common example is:

TLS Online TPP Program

#Question id: 2858

#Unit 2. Cellular Organization

When lactose enters the cell, it is converted to allolactose. It is allolactose (rather than lactose itself) that controls the Lac repressor. Paradoxically, the conversion of lactose to allolactose is catalyzed by b-galactosidase, itself encoded by one of the lac genes. How is this possible? Which statement is incorrect according lac genes expressions?

TLS Online TPP Program

#Question id: 24329

#Unit 4. Cell Communication and Cell Signaling

_______permit the passage of molecules as large as 1.2 nm in diameter (molecules smaller than 1200 Da).

TLS Online TPP Program

#Question id: 12178

#Unit 2. Cellular Organization

Following statements are regarding to V-class ATPases.

A. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the same direction.

B. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the same direction.

C. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the opposite direction.

D. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the opposite direction.