Biophysical-chem

What is the primary function of proteins in living systems?

• Provide energy for cells

• Act as enzymes

• Store genetic information

• Regulate body temperature

What are the four levels of protein structure?

• primary, secondary, tertiary, and quaternary

• alpha, beta, gamma, and delta

• first, second, third, and fourth

• primary, secondary, tertiary, and quaternary

How do enzymes speed up chemical reactions in biological systems?

• By lowering the activation energy

• By changing the pH of the system

• By inhibiting the reaction

• By increasing the activation energy

What is the structure of DNA?

• double helix

• square shape

• triple helix

• single strand

What is the function of DNA in living organisms?

• DNA helps in the digestion of food.

• DNA is responsible for producing energy in cells.

• DNA is involved in maintaining body temperature.

• DNA carries genetic instructions.

What is the structure of RNA?

• RNA is a carbohydrate composed of monosaccharides.

• RNA is a protein composed of amino acids.

• RNA is a double-stranded molecule composed of nucleotides connected by phosphodiester bonds.

• RNA is a single-stranded molecule composed of nucleotides connected by phosphodiester bonds.

What is the function of RNA in living organisms?

• RNA is responsible for storing genetic information in the nucleus.

• RNA helps in the production of ATP in the mitochondria.

• RNA is involved in the regulation of cell division.

• RNA carries genetic information from DNA to ribosomes for protein synthesis.

What is the helix-coil transition in biological systems?

• Transition between helical and random coil structures

• Transition between helical and alpha structures

• Transition between helical and beta structures

• Transition between helical and sheet structures

What factors can influence the helix-coil transition?

• pressure, concentration, time, molecular weight

• light intensity, magnetic field, electric current, viscosity

• particle size, surface area, volume, density

• temperature, pH, solvent conditions, presence of stabilizing or destabilizing agents

How does the helix-coil transition affect protein function?

• The helix-coil transition enhances protein function.

• The helix-coil transition affects protein function by altering the protein's structure and stability.

• The helix-coil transition has no effect on protein function.

• The helix-coil transition only affects protein stability, not structure.