A bacterial histidine mutant was plated on minimal medium and a single colony grew. You decide to sequence the histidine biosynthetic gene of the revertant and discover that the original mutation is still present.  This colony must have been able grow due to a

TLS Online TPP Program

#Question id: 658

#Unit 1. Molecules and their Interaction Relevant to Biology

To what level of structure do α-helices belong?

TLS Online TPP Program

#Question id: 11059

#Unit 7. System Physiology – Animal

A healthy, 45-year-old man is reading the newspaper. Which of the following muscles are used for quiet breathing?

TLS Online TPP Program

#Question id: 3440

#Unit 11. Evolution and Behavior

Which of the following is least related to the others?

TLS Online TPP Program

#Question id: 20052

#Unit 13. Methods in Biology

HCG-kit is based on the phenomenon of 

TLS Online TPP Program

#Question id: 1270

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a major extracellular molecule in mammals containing no protein portion?