FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 15: Rna Processing II: Capping and Polyadenylation

Show Answer

Share

---

All types

Filters

Study Flashcards

Question 1

Multiple Choice

Review LaterAdd Note

Review Later

Which of the following is NOT a function of the mRNA cap?

A) protects the mRNA from degradation
B) enhances translatability of the mRNA
C) enhances transport of the mRNA to the cytoplasm
D) enhances splicing of the mRNA
E) helps regulate expression of the mRNA

Correct Answer

verified

E

Question 2

True/False

Review LaterAdd Note

Review Later

Pre-mRNA processing begins during transcription.

Correct Answer

verified

Show Answer

Question 3

True/False

Review LaterAdd Note

The addition of poly(A)to mRNA seems to be important for its translatability.

Which of the following regions on calf-thymus poly(A) polymerase has been shown experimentally not to be necessary for its activity in vitro?

The poly(A) tail of eukaryotic mRNA is approximately ___________ nucleotides in length.

Which of the following is not required for mammalian cell polyadenylation of pre-mRNA?

Once a mRNA loses its poly(A)tail,it is imported back into the nucleus.

Experiments using yeast as a model have shown that cleavage of the poly(A)tail is necessary for transcription termination.

The 5' cap of mRNA helps protect the mature mRNA from degradation by ________.

Which of the following is the mRNA polyadenylation signal motif found in mammalian cells?

RNA polymerase II transcription of a gene usually stops at the polyadenylation site.

Poly(A) polymerase can be found in the _____________ of a cell.

The function of a nucleotide phosphohydrolase is to ______________ phosphates from its substrate.

Pre-mRNA must be cleaved before it is polyadenylated.

When does capping of the pre-mRNA occur?

At least 5 different cDNAs have been isolated for the enzyme poly(A)polymerase.These cDNAs are a result of alternative ___________ and ______________ of the poly(A)polymerase gene.

___________ RNA is the only type of RNA to get polyadenylated.

Most genes do not encode for a poly(A)tail.

The cap plays a role in the removal of the ___________ intron while poly(A)tail plays a role in the removal of the ____________ intron.

The capping substance for eukaryotic mRNAs is ______________.