True or false:
Multiple protein products are often produced from single eukaryotic genes.
true
True or false:
The Shine-Dalgarno box associates with an RNA component in the small subunit of ribosomes.
true
True or false:
The 5? and 3? untranslated regions (UTRs) of processed mRNA molecules are derived from introns.
false
True or false:
Introns are degraded in the cytoplasm
false
True or false:
Promoter sequences are transcribed
true
True or false:
Transcription and translation take place simultaneously in bacterial cells.
true
True or false:
The 3? acceptor stems on tRNAs specify which amino acid is attached.
false
True or false:
Intron cleavage and exon splicing are both mediated by the spliceosome.
true
True or false:
With the rare exception of RNA editing, every nucleotide contained in a processed mRNA molecule is derived from exon sequences
true
True or false:
Eukaryotic gene and protein sequences are generally colinear.
false
True or false:
Ribosomes typically contain about 80% of the total cellular RNA.
true
True or false:
In eukaryotes, genes for rRNA and tRNA are usually present within tandem repeats.
true
True or false:
The spliceosome is a large, ribonucleoprotein complex located in the cytoplasm.
false
True or false:
Ribosomal RNA is processed in both prokaryotes and eukaryotes.
true
True or false:
The number of introns is always less than the number of exons in a gene
True
True or false:
All eukaryotic genes contain an intron
fasle
True or false:
Mitochondrial and chloroplast genes do not contain introns
False
True or false:
UTR stands for untranscribed region
false
True or false:
Introns contain no sequence-specific information
false
True or false:
The poly(A) tails on mRNA molecules are transcribed from DNA templates.
false
All tRNA molecules contain a(n) __ and a single _____.
a. intron
b. anticodon
c. splice site
d. 5?-CCA-3?
e. UTR
(give answer as a,b)
d, b
Splicing of eukaryotic pre-mRNA involves ____ reactions and occurs in the ___.
a. methylation
b. transesterification
c. polyadenylation
d. nucleus
e. cytoplasm
(give answer as a,b)
b, d
Ribosomes typically contain __ % of the total RNA in a cell and consist
of ___proteins and RNA molecules.
a. 80
b. 50
c. more than 500
d. more than 100
e. more than 50
(give answer as a,b)
a, e
The 3' untranslated region affects the __ of mRNA and the __ of the mRNA protein-coding sequence.
a. translation
b. splicing
c. stability
d. transcription
(give answer as a,b)
c, a
The 5? cap on an mRNA is important for all the processes listed below except for the a of an mRNA molecule.
a. transcription
b. intron removal
c. stability
d. initiation of translation
a. transcription
The poly(A) tails found in the 3? end of an mRNA are important for all the processes listed below except for _ and __ .
a. mRNA stability
b. translation
c. intron splicing
d. protein stability
c, d