#Question id: 11941
#Unit 7. System Physiology – Animal
Under conditions of normal renal function, which of the following is true of the concentration of urea in tubular fluid at the end of the proximal tubule?
#Question id: 28952
#Unit 7. System Physiology – Animal
Which type of hormones that are releasing from hypothalamus and also involve to inhibit growth hormone secretion?
#Question id: 3990
#Unit 3. Fundamental Processes
Which of the following statements is true of the attenuation mechanism used to regulate the tryptophan biosynthetic operon in E. coli?
#Question id: 10370
#Unit 6. System Physiology – Plant
Rhizobial genes that participate in nodule formation are called nodulation (nod) genes. Only one of the nod genes, the regulatory and constitutively expressed and regulates the transcription of the other nod genes;
#Question id: 2856
#Unit 2. Cellular Organization
Match the lac genes with their enzymes & functions;
|
lac genes |
Enzyme |
Functions |
|
lacZ |
b-galactosidase |
which rids the cell of toxic thiogalactosides that also get transported in by lacY. |
|
lacY |
thiogalactoside transacetylase |
which cleaves the sugar lactose into galactose and glucose, both of which are used by the cell as energy sources |
|
lacA |
lactose permease |
a protein that inserts into the cell membrane and transports lactose into the cell |