Which of the following ethylene receptors in Arabidopsis) have intrinsic histidine kinase activity, and this activity does not appear to play an essential role in signalling?

TLS Online TPP Program

#Question id: 2668

#Unit 2. Cellular Organization

The toxic shock syndrome toxin is produced by some Salmonella species when there is not sufficient iron present. When iron is present, it prevents transcription of the TSS-toxin gene. Iron therefore serves as __________.

TLS Online TPP Program

#Question id: 2669

#Unit 2. Cellular Organization

what is an operon?

TLS Online TPP Program

#Question id: 2670

#Unit 2. Cellular Organization

A protein that binds to the operator and blocks the RNA polymerase

TLS Online TPP Program

#Question id: 2671

#Unit 2. Cellular Organization

The "on/off" switch for an operon is called the

TLS Online TPP Program

#Question id: 2672

#Unit 2. Cellular Organization

What is the name of the stretch of DNA where RNA polymerase binds?

TLS Online TPP Program

#Question id: 2673

#Unit 2. Cellular Organization

For a repressible operon to be transcribed, which of the following must be true?