California State University, Fullerton » Biology » Biology 251 - Genetics » Spring 2021

Question #1

Modification of bases in tRNAs includes:

A. conversion of uracil to cytosine.

B. conversion of uracil to thymine.

C. conversion of cytosine to thymine.

D. conversion of adenine to guanine.

Question #2

The tRNA 3' end is processed to always have the sequence _______ for attachment of the amino-acid.

A. 5'-ACC-3'

B. 5'-UGA-3'

C. 5'-CAA-3'

D. 5'-CCA-3'

E. 5'-AUG-3'

Question #3

Some tRNAs are spliced, but the splicing mechanism does not involve the spliceosome that is used for mRNA splicing.

A. False

B. True

Question #4

Eukaryotic rRNAs are transcribed and process from a precursor RNA (pre-rRNA) except the ____ rRNA.

A. 5.8S

B. 28S

C. 18S

D. 5S

Question #5

The processing of the pre-rRNA in eukaryotes is assisted by complementary binding to:

A. snoRNAs.

B. guide RNAs.

C. tRNAs.

D. microRNAs.

E. snRNAs.