Practice Questions

TLS Online TPP Program

#Question id: 910

Experiments on denaturation and renaturation after the reduction and reoxidation of the —S—S— bonds in the enzyme ribonuclease (RNase) have shown that:

#Unit 1. Molecules and their Interaction Relevant to Biology

folding of denatured RNase into the native, active conformation, requires the input of energy in the form of heat.
native ribonuclease does not have a unique secondary and tertiary structure.
the completely unfolded enzyme, with all —S—S— bonds broken, is still enzymatically active.
the primary sequence of RNase is sufficient to determine its specific secondary and tertiary structure.

More Questions

TLS Online TPP Program

#Question id: 19237

#Unit 12. Applied Biology

A type of structure, which may act as a transcription termination signal is

TLS Online TPP Program

#Question id: 2288

#Unit 2. Cellular Organization

Proteins lacking a signal peptide sequence will probably found in

TLS Online TPP Program

#Question id: 18385

#Unit 12. Applied Biology

Oil is a natural product, has many components and is biodegradable, the different components being degraded at different rates but still oil spills are considered as recalciterants because

TLS Online TPP Program

#Question id: 8717

#Unit 9. Diversity of Life Forms

Molecular clocks are more reliable when ________.

TLS Online TPP Program

#Question id: 15005

#Unit 8. Inheritance Biology

You identify a previously unidentified plant species and decide to study its genetics. You establish true breeding strains for leaf shape (longer than wide vs equal length and width) and flower color (white vs. yellow). When you perform a dihybrid cross with these strains, you find that your results are very different than those predicted by a 9:3:3:1 ratio. You calculate a chi square and get a p value of less than 0.0001. Which of the following statements is most accurate based on this observation?