BCHM 4115: Lectures 1-6

Front

Peptide Bonds have a _ configuration.

Back

planar trans

Front

At a pH of 5, does the titration curve depict 'good' buffering?

Back

No

Front

In thermodynamics, a closed system usually means that...

Back

Energy exchange may occur.

Front

A spontaneous reaction consists of...

Back

ΔG < 0 and the reaction is exergonic.

Front

A cell represents a biologically _ system. Where energy and/or matter exchange may occur.

Back

open

Front

What is the definition of a peptide bond?

Back

A covalent bond formed between two amino acids during protein synthesis.

Front

What does ΔG represent in thermodynamics?

Back

The change in free energy of a system.

Front

What is the significance of a negative ΔG value?

Back

It indicates that a reaction is spontaneous and can occur without external energy.

Front

What is the role of buffers in biological systems?

Back

Buffers help maintain a stable pH in biological systems by neutralizing acids and bases.

Front

What is the difference between exergonic and endergonic reactions?

Back

Exergonic reactions release energy (ΔG < 0), while endergonic reactions require energy input (ΔG > 0).