If a portion of the pancreas is surgically removed from a rat and the rat subsequently loses its appetite, one explanation is that the removed portion contains cells that secrete a chemical signal that somehow stimulates appetite. Given this scenario, what type of chemical signaling is occurring?

TLS Online TPP Program

#Question id: 4127

#3. Fundamental Processes

Which one of the following statements about ribosomes is true?

TLS Online TPP Program

#Question id: 4128

#3. Fundamental Processes

Which of the following statements about tRNA molecules is false?

TLS Online TPP Program

#Question id: 4129

#3. Fundamental Processes

Which of the following statements about the tRNA that normally accepts phenylalanine is false?  (mRNA codons for phenylalanine are UUU and UUC.)

TLS Online TPP Program

#Question id: 4130

#3. Fundamental Processes

Which of the following is not true of tRNA molecules?

TLS Online TPP Program

#Question id: 4131

#3. Fundamental Processes

Aminoacyl-tRNA synthetases (amino acid activating enzymes):

TLS Online TPP Program

#Question id: 4133

#3. Fundamental Processes

Which of the following statements about aminoacyl-tRNA synthetases is false?