In some situations a mitochondrion has both paternal and maternal alleles. This has two requirements: that both parents provide alleles to the zygote (which of course is not the

case when there is maternal inheritance.

TLS Online TPP Program

#Id: 2397

#Unit 3. Fundamental Processes

Splicing of pre-tRNAs is catalyzed by proteins, not by RNAs. 

TLS Online TPP Program

#Id: 2398

#Unit 3. Fundamental Processes

A pre-tRNA intron is excised in one step 

Finally, hydrolysis of GTP and ATP is required to join the two tRNA halves generated by cleavage on either side of the intron.

TLS Online TPP Program

#Id: 2399

#Unit 3. Fundamental Processes

There are two classes of snoRNPs involved in rRNA processing in nucleolus. 

The box H/ACA snoRNPs are involved in pseudouridylylation, and box C/D snoRNPs function in 2-O-methylations.

TLS Online TPP Program

#Id: 2400

#Unit 3. Fundamental Processes

Sigma Region 3/4 linker mimics RNA

TLS Online TPP Program

#Id: 2401

#Unit 3. Fundamental Processes

Region ¾ linker of s lies in the middle of the RNA exit channel in the open complex

TLS Online TPP Program

#Id: 2402

#Unit 3. Fundamental Processes

TF11S displays little similarity in sequence or structure to the Gre factors, but it binds to the same part of the enzyme, the RNA polymerase secondary channel (pore).